Fix install button (#3312 )

replace button with link
fix(frontend): address CodeRabbit follow-ups from #3276 and #3303 (#3311 )
2026-11-04 08:42:06 -05:00 · 2026-10-31 08:27:12 -05:00 · 2026-10-31 08:20:44 -05:00 · 2026-10-31 08:17:44 -05:00 · 2026-10-30 19:14:33 -05:00 · 2026-10-30 18:40:10 -05:00
272 changed files with 15030 additions and 2577 deletions
@@ -8,6 +8,7 @@ on:
 jobs:
  test-backend:
    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
@@ -17,6 +18,7 @@ jobs:
        run: go test -race -v ./... -timeout 30s
  lint-backend:
    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
@@ -28,6 +30,7 @@ jobs:
          cd backend && "$GOLANGCI_LINT" run --path-prefix=backend
  format-backend:
    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
@@ -37,6 +40,7 @@ jobs:
        run: go fmt ./...
  lint-frontend:
    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
@@ -46,6 +50,7 @@ jobs:
        run: npm i && npm run lint
  test-frontend:
    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
@@ -55,6 +60,7 @@ jobs:
        run: npm i && npm run test
  check-translations:
    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
@@ -64,6 +70,7 @@ jobs:
        run: npm i && npm run i18n:check
  check-docs:
    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
@@ -73,6 +80,7 @@ jobs:
      - run: git diff --exit-code
  check-icons:
    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
@@ -2,6 +2,67 @@

 All notable changes to this project will be documented in this file. For commit guidelines, please refer to [Standard Version](https://github.com/conventional-changelog/standard-version).

+## v2.1.4
+
+ **Security**:
+ - [Low] `GET /api/settings` and `GET /api/settings?property=auth` no longer return cleartext secrets (`auth.key`, `totpSecret`, `adminPassword`, OIDC `clientSecret`, LDAP bind password, recaptcha secret, OnlyOffice secret); secret fields are replaced with `**hidden**` in the response, and the YAML export now redacts the recaptcha and LDAP secrets whose comments lacked the `secret:` marker (GHSA-892f-9h5p-mfc8) reporter @paulmossman
+
+ **New Features**:
+ - feat(search): sidebar File actions and close button in advanced search (#3303) (#2479) (#3303)
+
+ **Bug Fixes**:
+ - Deleting a directory now releases folder quotas rooted inside it instead of leaving them charged for files that no longer exist; applies to API and WebDAV deletes (#3163) (#3235)
+ - Bulk and public share deletes now release accounted quota usage; nested folder quotas reset when an ancestor is removed (#3163) (#3305)
+ - Directory listings skip entries that return permission denied or not-found on per-entry stat instead of failing the whole folder (e.g. unreadable NTFS junctions on CIFS); skipped entries are omitted from the index like `ls -l` (#3184)
+ - Preview generation for webp broken (#3254) (#3259)
+ - Share banner never shows to public visitors, returns bannerUrl but not banner (#3246) (#3250)
+ - fix html/markdown relative file preview support (#3131) (#3129) (#2355)
+ - fix(archive): extract tar hard links instead of dropping them (#3234)
+ - fix(auth): apply stored permission caps for customized API tokens with no global flags enabled (#3255)
+ - Archive extraction writes regular and hard-link entries at the entry path instead of following an existing symlink at that path (tar and zip) (#3265)
+ - fix(move-copy): require choosing a destination source in advanced search when none can be inferred, instead of silently copying to the source root (#3276)
+ - fix(stream): single-file shares can now stream their own media on Windows by using slash-based path handling (#3270) (#3271)
+ - fix(users): `lockPassword` is now enforced on self-service password changes; non-admins get 403 while admin resets still work (#3279) (#3283)
+ - fix(analytics): the FreeBSD release binary now reports `freebsd` in `system.os` instead of `other` (#3244) (#3284)
+ - fix(frontend): share expiration now reads backend Unix-seconds timestamps correctly instead of showing dates decades off (#3247)
+ - fix(frontend): video on iPhone now uses the native fullscreen player instead of the in-page fallback (#3113) (#3288)
+ - fix(frontend): the video loading spinner no longer stays on for the rest of playback when the fetch stalls but the buffer can continue (#3287) (#3289)
+ - fix(frontend): the share banner is now shown to public visitors, using `bannerUrl` instead of the never-set `banner` field (#3246) (#3250)
+ - fix(preview): camera RAW files (Panasonic `.rw2`/`.raw`/`.rwl`, Olympus `.orf`, `.cr2`/`.dng`) extract embedded previews from TIFF strips/SubIFDs and no longer return 415 when EXIF decoding fails (#3219) (#3243)
+ - fix(indexing): restore lazy listing persistence with atomic folder-size deltas and ancestor propagation, and force a full scan for scanners that missed their slot while the process was down (#3260)
+ - fix(indexing): directory listings skip entries that cannot be accessed or have vanished instead of failing the whole listing; remaining errors still fail and fully-vanished nonempty directories return an error (#3292)
+ - fix(frontend): redirects from `/files` stay inside the files area so a source named "Files" no longer leaves an empty view after login (#3167) (#3304)
+
+## v2.1.3
+
+ **Security**:
+ - [Moderate] Passkey registration and deletion now require the account password when a passkey is already configured, and passkeys cannot be altered through generic user profile PATCH (GHSA-r744-4vm3-2px3) reporter @tonghuaroot
+ - [Medium] Storage quota accounting now records upload byte deltas using the pre-replace file size, and upload paths without size metadata or with resumed chunk offsets cannot skip quota checks (GHSA-m57f-66qj-8jxg) reporter @jayhemnani9910
+ - [High] Sources marked `readOnly` are now enforced on WebDAV writes, server-side archive/unarchive, and OnlyOffice save callbacks (GHSA-4v62-884x-2466) reporter @anpryl
+ - [Moderate] Moving or renaming a folder updates only shares whose paths are under the moved prefix, preserving per-file share roots instead of retargeting unrelated substring matches (GHSA-26fh-r34c-qxh6) reporters @jayhemnani9910 @dylanzonix
+ - [Moderate] WebDAV PUT now requires Create permission when the target path does not yet exist, so Modify-only users cannot create new files (GHSA-8655-2ph3-q7q7) reporter @levanduy181
+ - [Low] Failed-login lockout and auth rate limits now use the rightmost `X-Forwarded-For` hop when proxy headers are trusted, so a client cannot spoof the client IP with a leftmost forwarded value (GHSA-wjp8-g49g-xrhx) reporter @LECOQQ
+ - [Low] Duplicate finder results are cached per requesting user so filtered file names from one account are not served to another (GHSA-4fhx-8pf6-5gmr) reporter @Nazarami
+ - [Moderate] Authenticated `GET /api/resources/view` no longer accepts view tokens minted for a public share when the caller lacks view permission on the requested source (GHSA-wxj5-g3qp-g732) reporter @BlueN0r
+ - [Low] SSE source-update and user-targeted delivery hold the client registry lock through nonblocking sends, preventing concurrent map mutation and send-on-closed-channel panics when Realtime clients connect, disconnect, or shut down (GHSA-p9wm-f5jj-75pj) reporter @tao0845
+ - [High] Incomplete symlink-containment remediation: an authenticated non-admin user could create a relative symlink via archive extraction, relocate it with WebDAV MOVE, and write through it to arbitrary host paths with the service account's privileges (GHSA-3j46-5w28-f8p2) reporter @Saku0512
+ - [Moderate] Source-root containment bypass: create, write, delete, and move operations now resolve symlinks uncached and enforce the caller's scope, closing escapes through pre-existing out-of-source symlinks on upload, PUT, PATCH, delete, and WebDAV endpoints (GHSA-j764-qg3m-rhv7) reporter @chaoming0625
+ - [Moderate] Preview reads resolve symlinks within the caller's scope so authenticated preview cannot follow an out-of-scope symlink target (GHSA-g2q5-r6ch-v25f) reporter @tao0845
+ - [Moderate] Archive downloads and extraction no longer read or write through symlinks that resolve outside the caller's share or user scope; escaping archive-walk entries are skipped (GHSA-qqf3-2wvq-q4w9) reporter @SmokinCaterpillar
+ - [Moderate] Share directory-archive downloads now apply the share owner's access rules to every entry, closing a bypass where anonymous share visitors could download admin-denied content (GHSA-9fcr-gm58-p839) reporter @Tan-JunWei
+ - [Moderate] Access rule paths are stored and matched case-insensitively so rules cannot be bypassed via path casing on case-insensitive filesystems; existing rules are migrated at startup (GHSA-4vrc-935w-xxq2) reporter @FrogApprentice
+
+ **New Features**:
+ - chunked uploads for large files like rclone `--owncloud-chunk-size` (#3112)
+
+ **Bug Fixes**:
+ - keep requested permissions when creating a user (#3130)
+ - add missing file modify logging to activity viewer (#3152)
+ - fix(frontend): restore upload prompt close, tab-reload, and in-app navigation guards while uploads are active (including paused uploads)
+ - fix(frontend): load the default source when browsing `/files/` with a single configured source ([#3178](https://github.com/gtsteffaniak/filebrowser/issues/3178)) (related: [#3143](https://github.com/gtsteffaniak/filebrowser/issues/3143), [#3144](https://github.com/gtsteffaniak/filebrowser/issues/3144))
+ - Path picker list and thumbnails not working in shares in the markdown editor (#3223).
+ - perf(indexing): single statx per Linux directory entry (#1890)
+
 ## v2.1.2

 **Security**:
@@ -28,7 +28,7 @@ require (
 	github.com/OpenPeeDeeP/depguard/v2 v2.2.1 // indirect
 	github.com/air-verse/air v1.67.4 // indirect
 	github.com/alecthomas/chroma/v2 v2.27.0 // indirect
-github.com/alecthomas/go-check-sumtype v0.5.1-0.20260828200218-ae6904d28606 // indirect
+	github.com/alecthomas/go-check-sumtype v0.5.1-0.20260828200218-ae6904d28606 // indirect
 	github.com/alexkohler/nakedret/v2 v2.0.6 // indirect
 	github.com/alexkohler/prealloc v1.1.0 // indirect
 	github.com/alfatraining/structtag v1.0.0 // indirect
@@ -45,7 +45,7 @@ github.com/alecthomas/go-check-sumtype v0.5.1-0.20260828200218-ae6904d28606 // i
 	github.com/blizzy78/varnamelen v0.8.0 // indirect
 	github.com/bombsimon/wsl/v4 v4.7.0 // indirect
 	github.com/bombsimon/wsl/v5 v5.9.0 // indirect
-	github.com/breml/bidichk v0.3.3 // indirect
+	github.com/breml/bidichk v0.3.4 // indirect
 	github.com/breml/errchkjson v0.4.1 // indirect
 	github.com/butuzov/ireturn v0.4.1 // indirect
 	github.com/butuzov/mirror v1.3.3 // indirect
@@ -54,7 +54,7 @@ github.com/alecthomas/go-check-sumtype v0.5.1-0.20260828200218-ae6904d28606 // i
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/charithe/durationcheck v0.0.11 // indirect
 	github.com/charmbracelet/colorprofile v0.4.3 // indirect
-github.com/charmbracelet/ultraviolet v0.0.0-20260922123528-4e49372c11f9 // indirect
+	github.com/charmbracelet/ultraviolet v0.0.0-20260922123528-4e49372c11f9 // indirect
 	github.com/charmbracelet/x/ansi v0.11.8 // indirect
 	github.com/charmbracelet/x/term v0.2.2 // indirect
 	github.com/charmbracelet/x/termios v0.1.1 // indirect
@@ -101,16 +101,16 @@ github.com/charmbracelet/ultraviolet v0.0.0-20260922123528-4e49372c11f9 // indir
 	github.com/gohugoio/hashstructure v1.1.0 // indirect
 	github.com/gohugoio/hugo v0.165.0 // indirect
 	github.com/golangci/asciicheck v0.5.0 // indirect
-	github.com/golangci/canonicalheader v0.0.0-20260827115959-a25c71c521f6 // indirect
+	github.com/golangci/canonicalheader v0.0.0-20260928145534-e18e5c5a078f // indirect
 	github.com/golangci/dupl v0.0.0-20260401084720-c99c5cf5c202 // indirect
 	github.com/golangci/go-printf-func-name v0.1.1 // indirect
 	github.com/golangci/gofmt v0.0.0-20260820135601-e84e05053792 // indirect
-github.com/golangci/golangci-lint/v2 v2.14.0 // indirect
-	github.com/golangci/golines v0.15.0 // indirect
+	github.com/golangci/golangci-lint/v2 v2.15.0 // indirect
+	github.com/golangci/golines v0.16.0 // indirect
 	github.com/golangci/misspell v0.8.0 // indirect
 	github.com/golangci/plugin-module-register v0.1.2 // indirect
 	github.com/golangci/revgrep v0.8.0 // indirect
-	github.com/golangci/rowserrcheck v0.0.0-20260901154044-241134db7241 // indirect
+	github.com/golangci/rowserrcheck v0.0.0-20261005233414-e0740d52dee8 // indirect
 	github.com/golangci/swaggoswag v0.0.0-20250504205917-77f2aca3143e // indirect
 	github.com/golangci/unconvert v0.0.0-20250410112200-a129a6e6413e // indirect
 	github.com/google/go-cmp v0.7.0 // indirect
@@ -129,10 +129,10 @@ github.com/golangci/golangci-lint/v2 v2.14.0 // indirect
 	github.com/joho/godotenv v1.5.1 // indirect
 	github.com/julz/importas v0.2.0 // indirect
 	github.com/karamaru-alpha/copyloopvar v1.2.2 // indirect
-	github.com/kisielk/errcheck v1.20.0 // indirect
+	github.com/kisielk/errcheck v1.30.0 // indirect
 	github.com/kkHAIKE/contextcheck v1.1.6 // indirect
 	github.com/kulti/thelper v0.7.1 // indirect
-	github.com/kunwardeep/paralleltest v1.0.15 // indirect
+	github.com/kunwardeep/paralleltest v1.0.16 // indirect
 	github.com/ldez/exptostd v0.4.5 // indirect
 	github.com/ldez/gomoddirectives v0.10.0 // indirect
 	github.com/ldez/grignotin v0.10.1 // indirect
@@ -147,17 +147,17 @@ github.com/golangci/golangci-lint/v2 v2.14.0 // indirect
 	github.com/maratori/testableexamples v1.0.1 // indirect
 	github.com/maratori/testpackage v1.1.2 // indirect
 	github.com/matoous/godox v1.1.0 // indirect
-	github.com/mattn/go-colorable v0.1.15 // indirect
+	github.com/mattn/go-colorable v0.1.16 // indirect
 	github.com/mattn/go-isatty v0.0.24 // indirect
 	github.com/mattn/go-runewidth v0.0.30 // indirect
-github.com/mgechev/revive v1.17.0 // indirect
+	github.com/mgechev/revive v1.17.1 // indirect
 	github.com/mitchellh/go-homedir v1.1.0 // indirect
 	github.com/moricho/tparallel v0.3.2 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/nakabonne/nestif v0.3.1 // indirect
-	github.com/nishanths/exhaustive v0.13.0 // indirect
-	github.com/nishanths/predeclared v0.2.2 // indirect
+	github.com/nishanths/exhaustive v0.15.0 // indirect
+	github.com/nishanths/predeclared v0.3.0 // indirect
 	github.com/nunnatsa/ginkgolinter v0.24.0 // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/pelletier/go-toml/v2 v2.4.3 // indirect
@@ -200,15 +200,15 @@ github.com/mgechev/revive v1.17.0 // indirect
 	github.com/swaggo/swag v1.16.6 // indirect
 	github.com/tdewolff/parse/v2 v2.8.16 // indirect
 	github.com/tetafro/godot v1.5.6 // indirect
-github.com/timakin/bodyclose v0.0.0-20260923065923-98ded9ab4ef2 // indirect
-	github.com/timonwong/loggercheck v0.12.0 // indirect
-	github.com/tomarrell/wrapcheck/v2 v2.12.0 // indirect
+	github.com/timakin/bodyclose v0.0.0-20260923065923-98ded9ab4ef2 // indirect
+	github.com/timonwong/loggercheck v0.13.0 // indirect
+	github.com/tomarrell/wrapcheck/v2 v2.13.0 // indirect
 	github.com/tommy-muehle/go-mnd/v2 v2.5.1 // indirect
 	github.com/ultraware/funlen v0.2.0 // indirect
 	github.com/ultraware/whitespace v0.2.0 // indirect
 	github.com/urfave/cli/v2 v2.27.7 // indirect
-	github.com/uudashr/gocognit v1.2.1 // indirect
-	github.com/uudashr/iface v1.5.1 // indirect
+	github.com/uudashr/gocognit v1.3.0 // indirect
+	github.com/uudashr/iface v1.5.3 // indirect
 	github.com/xen0n/gosmopolitan v1.3.0 // indirect
 	github.com/xo/terminfo v1.2.0 // indirect
 	github.com/xrash/smetrics v0.0.0-20250705151800-55b8f293f342 // indirect
@@ -225,14 +225,14 @@ github.com/timakin/bodyclose v0.0.0-20260923065923-98ded9ab4ef2 // indirect
 	go.yaml.in/yaml/v2 v2.4.4 // indirect
 	go.yaml.in/yaml/v3 v3.0.5 // indirect
 	golang.org/x/exp/typeparams v0.0.0-20260908205506-85c1c2202aba // indirect
-	golang.org/x/mod v0.41.0 // indirect
-	golang.org/x/sync v0.23.0 // indirect
-	golang.org/x/sys v0.48.0 // indirect
+	golang.org/x/mod v0.42.0 // indirect
+	golang.org/x/sync v0.24.0 // indirect
+	golang.org/x/sys v0.49.0 // indirect
 	golang.org/x/text v0.42.0 // indirect
-	golang.org/x/tools v0.50.0 // indirect
+	golang.org/x/tools v0.52.0 // indirect
 	google.golang.org/protobuf v1.36.12 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	honnef.co/go/tools v0.8.1 // indirect
+	honnef.co/go/tools v0.8.2 // indirect
 	mvdan.cc/gofumpt v0.12.0 // indirect
 	mvdan.cc/unparam v0.0.0-20260823230713-2fa3d841b0c8 // indirect
 	sigs.k8s.io/yaml v1.6.0 // indirect
@@ -124,6 +124,8 @@ github.com/bombsimon/wsl/v5 v5.9.0 h1:WCrgZ7RQnZO5oEwbVTlYgBdU3wL294kR1BSWV8vTfs
 github.com/bombsimon/wsl/v5 v5.9.0/go.mod h1:kjo4HiAV5FDkHC8/uzJq9mBffEEd6WT/nvN7DoMovDM=
 github.com/breml/bidichk v0.3.3 h1:WSM67ztRusf1sMoqH6/c4OBCUlRVTKq+CbSeo0R17sE=
 github.com/breml/bidichk v0.3.3/go.mod h1:ISbsut8OnjB367j5NseXEGGgO/th206dVa427kR8YTE=
+github.com/breml/bidichk v0.3.4 h1:70G6w80G6GDZTUURHTC5gBKVjMLMw2736CzXquSf5Ek=
+github.com/breml/bidichk v0.3.4/go.mod h1:GOHprnh4i0V7HrvWjtbvbpicTUcqoYt9zYESKcJkk4M=
 github.com/breml/errchkjson v0.4.1 h1:keFSS8D7A2T0haP9kzZTi7o26r7kE3vymjZNeNDRDwg=
 github.com/breml/errchkjson v0.4.1/go.mod h1:a23OvR6Qvcl7DG/Z4o0el6BRAjKnaReoPQFciAl9U3s=
 github.com/butuzov/ireturn v0.4.1 h1:vWb3NO4t77iku/sjCQ/2pHTQeOmxEhjIriJqRLg1Y+I=
@@ -288,6 +290,8 @@ github.com/golangci/asciicheck v0.5.0 h1:jczN/BorERZwK8oiFBOGvlGPknhvq0bjnysTj4n
 github.com/golangci/asciicheck v0.5.0/go.mod h1:5RMNAInbNFw2krqN6ibBxN/zfRFa9S6tA1nPdM0l8qQ=
 github.com/golangci/canonicalheader v0.0.0-20260827115959-a25c71c521f6 h1:fVLolA3dG6s0brGetsiDAtcnpMSwVa2LqXJEw/9RJG4=
 github.com/golangci/canonicalheader v0.0.0-20260827115959-a25c71c521f6/go.mod h1:1xo+NFW5S+bEf2DKXhaxuzvcDN5AR6o/KMwvqC5Mkpo=
+github.com/golangci/canonicalheader v0.0.0-20260928145534-e18e5c5a078f h1:pOnwRNeWLPkADfkgqKcCP7RPQAS9OIzffaBaktRsKnk=
+github.com/golangci/canonicalheader v0.0.0-20260928145534-e18e5c5a078f/go.mod h1:aXo+AVSX0pC3TRo2wAfR92YwBKfG6C2eal+omjKXwYw=
 github.com/golangci/dupl v0.0.0-20260401084720-c99c5cf5c202 h1:CbTB8KpqnViI6lIXxp03Oclc4VFHi3K4BWC1TacsZ+A=
 github.com/golangci/dupl v0.0.0-20260401084720-c99c5cf5c202/go.mod h1:NUw9Zr2Sy7+HxzdjIULge71wI6yEg1lWQr7Evcu8K0E=
 github.com/golangci/go-printf-func-name v0.1.1 h1:hIYTFJqAGp1iwoIfsNTpoq1xZAarogrvjO9AfiW3B4U=
@@ -298,8 +302,12 @@ github.com/golangci/golangci-lint/v2 v2.13.2 h1:bCyq3E4vo9qwzifjpzJqYndEt7Ncva80
 github.com/golangci/golangci-lint/v2 v2.13.2/go.mod h1:5xaMd1kAxV7GSBPEyngw8gnnjoRocqW9UVKdBR6627w=
 github.com/golangci/golangci-lint/v2 v2.14.0 h1:ot8QffRa4LzAAEgtvNYrVs9esxQ7xoTwoAv6uhp4ngA=
 github.com/golangci/golangci-lint/v2 v2.14.0/go.mod h1:amHimCzNDP1GfVno3hIiNssjvqXmuW+CPZAHOdR4cIc=
+github.com/golangci/golangci-lint/v2 v2.15.0 h1:w94zf8HAYI7hm3164kwKsvZRuqXvY+YxeFoTbu1OLg8=
+github.com/golangci/golangci-lint/v2 v2.15.0/go.mod h1:/FRI304IxqDVhX2o3ZZ0qp8Vvz8egJdzCY5A4GjvmTU=
 github.com/golangci/golines v0.15.0 h1:Qnph25g8Y1c5fdo1X7GaRDGgnMHgnxh4Gk4VfPTtRx0=
 github.com/golangci/golines v0.15.0/go.mod h1:AZjXd23tbHMpowhtnGlj9KCNsysj72aeZVVHnVcZx10=
+github.com/golangci/golines v0.16.0 h1:xKdwzRvwzLd7V131B/dv90vUiEoTA0vQybdeqperPOg=
+github.com/golangci/golines v0.16.0/go.mod h1:mCMgRQHiCvuALJOeaNtylu09zbzvS9Ka01dfvLLJios=
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@@ -308,6 +316,8 @@ github.com/golangci/revgrep v0.8.0 h1:EZBctwbVd0aMeRnNUsFogoyayvKHyxlV3CdUA46FX2
 github.com/golangci/revgrep v0.8.0/go.mod h1:U4R/s9dlXZsg8uJmaR1GrloUr14D7qDl8gi2iPXJH8k=
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 github.com/golangci/rowserrcheck v0.0.0-20260901154044-241134db7241/go.mod h1:lczq5oJ8PxpMESQG6dO3iFYTQPhpqoMOYw//n2FEnHA=
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@@ -365,6 +375,8 @@ github.com/karamaru-alpha/copyloopvar v1.2.2 h1:yfNQvP9YaGQR7VaWLYcfZUlRP2eo2vhE
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@@ -378,6 +390,8 @@ github.com/kulti/thelper v0.7.1 h1:fI8QITAoFVLx+y+vSyuLBP+rcVIB8jKooNSCT2EiI98=
 github.com/kulti/thelper v0.7.1/go.mod h1:NsMjfQEy6sd+9Kfw8kCP61W1I0nerGSYSFnGaxQkcbs=
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@@ -416,6 +430,8 @@ github.com/matryer/is v1.4.0 h1:sosSmIWwkYITGrxZ25ULNDeKiMNzFSr4V/eqBQP0PeE=
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@@ -424,6 +440,8 @@ github.com/mgechev/revive v1.16.0 h1:9OZVO8xOPUwIYynplHXv7liMllPQ/BTNZLp07sM/Im0
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@@ -444,8 +462,13 @@ github.com/niklasfasching/go-org v1.9.1 h1:/3s4uTPOF06pImGa2Yvlp24yKXZoTYM+nsIlM
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@@ -581,8 +604,12 @@ github.com/timakin/bodyclose v0.0.0-20260923065923-98ded9ab4ef2 h1:HECVafB2AKntW
 github.com/timakin/bodyclose v0.0.0-20260923065923-98ded9ab4ef2/go.mod h1:JLoPVtROtNgJ99yXTIxuGNttvmJa85tkJAO6lr05qBA=
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@@ -593,8 +620,12 @@ github.com/urfave/cli/v2 v2.27.7 h1:bH59vdhbjLv3LAvIu6gd0usJHgoTTPhCFib8qqOwXYU=
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@@ -661,6 +692,8 @@ golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
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 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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@@ -672,6 +705,7 @@ golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
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 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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@@ -681,6 +715,8 @@ golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJ
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 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@@ -696,6 +732,8 @@ golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBc
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 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
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@@ -718,6 +756,8 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
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@@ -736,6 +776,8 @@ gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.8.1 h1:+JKf3xJ1ni4CwrhVg4/pqsfPGP6vNAXcKbMXJodYx3w=
 honnef.co/go/tools v0.8.1/go.mod h1:XA+OnlRA9EDh/ukGvXMNSZNKGwFQJ+5dER0ioUkOxks=
+honnef.co/go/tools v0.8.2 h1:+jPbCzuYxYrcoOvCecYUFDj+XJQRmzIhJmlbpps21Zk=
+honnef.co/go/tools v0.8.2/go.mod h1:xG1Q4n+mg3bKZrO6RWFA9jFlkqplflmDRHGeuexiLDs=
 mvdan.cc/gofumpt v0.12.0 h1:1Lbudkz2kpM9Cjz2pL4M19u7q+GaEhCTNf7N9mfpcho=
 mvdan.cc/gofumpt v0.12.0/go.mod h1:SmBHHrljiZu/uoypeKup3rFzP6eoC9UwCp2iH5E3jZA=
 mvdan.cc/unparam v0.0.0-20260823230713-2fa3d841b0c8 h1:Re1NRyLpiAt9kB+ImaaoapwWiQXrKwER4tY8fLOkDew=
@@ -289,6 +289,9 @@ func migrateUsers(oldDB *storm.DB, sqlStore *sqldb.SQLStore) error {
 		prevVersion := user.Version
 		if len(user.BackendScopes) == 0 {
 			settings.ApplyUserDefaults(user)
+			if !user.Permissions.Admin {
+				settings.ExpandBackendScopesForCreateUserDir(user)
+			}
 		}
 		if prevVersion < users.SourcePermissionsMigrationVersion {
 			// ApplyUserDefaults bumps Version; restore pre-defaults version so legacy global file ops migrate to scopes.
@@ -27,6 +27,9 @@ func TestMigrateUsersFlow_appliesConfigDefaultsAndSourcePermissions(t *testing.T
 	prevVersion := user.Version
 	if len(user.BackendScopes) == 0 {
 		settings.ApplyUserDefaults(user)
+		if !user.Permissions.Admin {
+			settings.ExpandBackendScopesForCreateUserDir(user)
+		}
 	}
 	if prevVersion < users.SourcePermissionsMigrationVersion {
 		user.Version = prevVersion
@@ -50,7 +53,7 @@ func TestMigrateUsersFlow_appliesConfigDefaultsAndSourcePermissions(t *testing.T
 		t.Fatalf("scope permissions after migration: %+v", perms)
 	}
 	if user.BackendScopes[0].Scope != "/legacy-bolt-user" {
-		t.Fatalf("createUserDir scope=%q", user.BackendScopes[0].Scope)
+		t.Fatalf("scope after applying migration defaults=%q", user.BackendScopes[0].Scope)
 	}
 }

@@ -11,7 +11,7 @@ require (
 	github.com/dsoprea/go-exif/v3 v3.0.1
 	github.com/evanoberholster/imagemeta v1.1.0
 	github.com/gen2brain/go-fitz v1.28.2
-	github.com/go-ldap/ldap/v3 v3.4.14
+	github.com/go-ldap/ldap/v3 v3.4.15
 	github.com/go-playground/validator/v10 v10.30.5
 	github.com/go-webauthn/webauthn v0.18.2
 	github.com/goccy/go-yaml v1.19.2
@@ -19,25 +19,25 @@ require (
 	github.com/google/go-cmp v0.7.0
 	github.com/google/uuid v1.6.0
 	github.com/gtsteffaniak/go-cache v1.1.0
-	github.com/gtsteffaniak/go-ffmpeg v1.2.0
+	github.com/gtsteffaniak/go-ffmpeg v1.4.0
 	github.com/gtsteffaniak/go-logger v1.1.0
-	github.com/kovidgoyal/imaging v1.8.23
+	github.com/kovidgoyal/imaging v1.9.0
 	github.com/mattn/go-sqlite3 v1.14.52
 	github.com/pquerna/otp v1.5.0
 	github.com/spf13/afero v1.15.0
 	github.com/stretchr/testify v1.12.1
 	github.com/swaggo/http-swagger v1.3.4
 	github.com/swaggo/swag v1.16.6
-	golang.org/x/crypto v0.57.0
-	golang.org/x/image v0.46.0
-	golang.org/x/mod v0.41.0
-	golang.org/x/net v0.59.0
+	golang.org/x/crypto v0.58.0
+	golang.org/x/image v0.47.0
+	golang.org/x/mod v0.42.0
+	golang.org/x/net v0.61.0
 	golang.org/x/oauth2 v0.37.0
-	golang.org/x/sys v0.48.0
-	golang.org/x/term v0.46.0
-	golang.org/x/text v0.42.0
+	golang.org/x/sys v0.49.0
+	golang.org/x/term v0.47.0
+	golang.org/x/text v0.43.0
 	golang.org/x/time v0.16.0
-	golang.org/x/tools v0.50.0
+	golang.org/x/tools v0.52.0
 	gopkg.in/yaml.v3 v3.0.1
 	modernc.org/sqlite v1.60.1
 )
@@ -49,12 +49,12 @@ require (
 	github.com/dsoprea/go-logging v0.0.0-20200710184922-b02d349568dd // indirect
 	github.com/dsoprea/go-utility/v2 v2.0.0-20221003172846-a3e1774ef349 // indirect
 	github.com/dustin/go-humanize v1.1.0 // indirect
-	github.com/ebitengine/purego v0.11.1 // indirect
-	github.com/fxamacker/cbor/v2 v2.9.4 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.15 // indirect
+	github.com/ebitengine/purego v0.11.2 // indirect
+	github.com/fxamacker/cbor/v2 v2.9.6 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.16 // indirect
 	github.com/go-asn1-ber/asn1-ber v1.5.8 // indirect
 	github.com/go-errors/errors v1.5.1 // indirect
-	github.com/go-jose/go-jose/v4 v4.1.5 // indirect
+	github.com/go-jose/go-jose/v4 v4.1.6 // indirect
 	github.com/go-openapi/jsonpointer v1.0.2 // indirect
 	github.com/go-openapi/jsonreference v1.0.3 // indirect
 	github.com/go-openapi/spec v1.0.1 // indirect
@@ -80,7 +80,7 @@ require (
 	github.com/leodido/go-urn v1.5.0 // indirect
 	github.com/mattn/go-isatty v0.0.24 // indirect
 	github.com/ncruces/go-strftime v1.1.0 // indirect
-	github.com/philhofer/fwd v1.2.0 // indirect
+	github.com/philhofer/fwd v1.2.1 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/rogpeppe/go-internal v1.16.0 // indirect
@@ -90,12 +90,12 @@ require (
 	github.com/x448/float16 v0.8.4 // indirect
 	go.etcd.io/bbolt v1.5.0 // indirect
 	go.yaml.in/yaml/v3 v3.0.5 // indirect
-	golang.org/x/sync v0.23.0 // indirect
+	golang.org/x/sync v0.24.0 // indirect
 	google.golang.org/appengine v1.6.8 // indirect
 	google.golang.org/protobuf v1.36.12 // indirect
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
-	modernc.org/libc v1.77.1 // indirect
+	modernc.org/libc v1.79.0 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
 	modernc.org/memory v1.12.1 // indirect
 )
@@ -47,14 +47,14 @@ github.com/dsoprea/go-utility/v2 v2.0.0-20221003172846-a3e1774ef349 h1:DilThiXje
 github.com/dsoprea/go-utility/v2 v2.0.0-20221003172846-a3e1774ef349/go.mod h1:4GC5sXji84i/p+irqghpPFZBF8tRN/Q7+700G0/DLe8=
 github.com/dustin/go-humanize v1.1.0 h1:dbKTrvD0klcbBV/h4AWJdMuZogJACoMlvWIWZ5b2xWg=
 github.com/dustin/go-humanize v1.1.0/go.mod h1:hc1CvRkJMsgxqjmjMQF3QNRAZBwY8AXBAzKYoSX9sFI=
-github.com/ebitengine/purego v0.11.1 h1:2zpWRSQNVKN4eKsKO9eM1ILDgWfYMY9GwqRmK6XeQ/0=
-github.com/ebitengine/purego v0.11.1/go.mod h1:DCHPP08djqhNSoTfImcnHYQRZmd0qhakvrozqaEYhGQ=
+github.com/ebitengine/purego v0.11.2 h1:WWiTx8rD8zYdOwSj8O/NiNbsOvSAgJMTlyV1XlbUSeU=
+github.com/ebitengine/purego v0.11.2/go.mod h1:DCHPP08djqhNSoTfImcnHYQRZmd0qhakvrozqaEYhGQ=
 github.com/evanoberholster/imagemeta v1.1.0 h1:0iBtgVxLORZTZAlKxRcNodBmjMfHCSFwUh8Asmi83oI=
 github.com/evanoberholster/imagemeta v1.1.0/go.mod h1:nmf6le+qSyoRAXgp2psPbtfkxcEgf/AZGgai9pnN8d0=
-github.com/fxamacker/cbor/v2 v2.9.4 h1:xwjVlxEMR3S605oUlgBjKLTTeGFciYPGYCtF/35LKGo=
-github.com/fxamacker/cbor/v2 v2.9.4/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
-github.com/gabriel-vasile/mimetype v1.4.15 h1:05iP/CYtZ/w455R/KZM6rZ5ieAdh99UPtd+d3YzLmaI=
-github.com/gabriel-vasile/mimetype v1.4.15/go.mod h1:azpTcoLcDZRNgFou5j+APrqQx9HqVPWa6ijYQIIVswQ=
+github.com/fxamacker/cbor/v2 v2.9.6 h1:NHZPxuUjJXQjX9itA785y/5NKSlI4HQ+S7noZsmI7hs=
+github.com/fxamacker/cbor/v2 v2.9.6/go.mod h1:4EaZp6ClVunETjQ4GHmGNzysDK91Lr+r6Yz6tJqzVCw=
+github.com/gabriel-vasile/mimetype v1.4.16 h1:5izNFuvA37st1dDRAcA7TtmngBmRgiIPDmTtiEvjx1E=
+github.com/gabriel-vasile/mimetype v1.4.16/go.mod h1:3oFFwxX8kTklZwzIl2aQEDZT0lKY8xH92ST88bAwba4=
 github.com/gen2brain/go-fitz v1.28.2 h1:845G85N5TUgnq5oDqyYrW0JvehAkeo35UkkK2dJtW1M=
 github.com/gen2brain/go-fitz v1.28.2/go.mod h1:pY2hqAjp9Zy7qfPI2gwbJMHBFAdZpVXOLrRxD82l3Bs=
 github.com/go-asn1-ber/asn1-ber v1.5.8 h1:H9AZkK22UOmfX8J84ubyaZxKJZ3FMHVwn8swoMML7iQ=
@@ -65,10 +65,10 @@ github.com/go-errors/errors v1.1.1/go.mod h1:psDX2osz5VnTOnFWbDeWwS7yejl+uV3FEWE
 github.com/go-errors/errors v1.4.2/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3BopGUQ5a5Og=
 github.com/go-errors/errors v1.5.1 h1:ZwEMSLRCapFLflTpT7NKaAc7ukJ8ZPEjzlxt8rPN8bk=
 github.com/go-errors/errors v1.5.1/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3BopGUQ5a5Og=
-github.com/go-jose/go-jose/v4 v4.1.5 h1:RjgjO2LOtWOJKUC5wpwY9LR3B3vwVAz6JS2YHfYU6eA=
-github.com/go-jose/go-jose/v4 v4.1.5/go.mod h1:x4oUasVrzR7071A4TnHLGSPpNOm2a21K9Kf04k1rs08=
-github.com/go-ldap/ldap/v3 v3.4.14 h1:D6PYdEgsaVzsXyr6w/yDC06Ria4uUhWm+Rb+er8lfAs=
-github.com/go-ldap/ldap/v3 v3.4.14/go.mod h1:S4eJUMUNjDkE0ZJtIZdybwyb03sGGLW6gxXT1Hs8VKA=
+github.com/go-jose/go-jose/v4 v4.1.6 h1:sNRkftxFJxwsILiQukqp5z83QBSmntVwmgRY7AqBDO4=
+github.com/go-jose/go-jose/v4 v4.1.6/go.mod h1:x4oUasVrzR7071A4TnHLGSPpNOm2a21K9Kf04k1rs08=
+github.com/go-ldap/ldap/v3 v3.4.15 h1:eRB4f4Ecn1POL1mO86+uUDlecmyWsdiJwh60bAUS4UY=
+github.com/go-ldap/ldap/v3 v3.4.15/go.mod h1:jeD0c98EdZQCKKKKe4kTWs5aCf6y+j8KuYsYLznZSQk=
 github.com/go-openapi/jsonpointer v1.0.2 h1:NbW7xT2b+l7x+JefiPGDsZWsrLk1ogrz4AHK1TTzMt8=
 github.com/go-openapi/jsonpointer v1.0.2/go.mod h1:N0rI4MbNKD7xAFTiHtB+5Nhrg2j/wwYg7m7Fmb4/jk8=
 github.com/go-openapi/jsonreference v1.0.3 h1:5rDbq+JsjCv6/nUDDJt83nLZoADI4w03uvHXer+4aYQ=
@@ -143,8 +143,8 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gtsteffaniak/go-cache v1.1.0 h1:ni/2cJpCxpGmaMZd92iTDIGOy+yUcMcxQuW7bSKhkCE=
 github.com/gtsteffaniak/go-cache v1.1.0/go.mod h1:rHUZvf4huhMX/bnNK4/oQ3sNAE2fYC2jFpAWZiBPWac=
-github.com/gtsteffaniak/go-ffmpeg v1.2.0 h1:WSFfRL5xVUpEXBNI4D3f2Uz8yxbc3OEqTtjp4Z9yPUo=
-github.com/gtsteffaniak/go-ffmpeg v1.2.0/go.mod h1:FefhoD+KZzHWqBaUpntcKp6lXtUzdFW00F74axnENUQ=
+github.com/gtsteffaniak/go-ffmpeg v1.4.0 h1:XkNFlx6koCCh8cFXn9HxYEEpvLlbnxmIvWX+5HLuN+8=
+github.com/gtsteffaniak/go-ffmpeg v1.4.0/go.mod h1:FefhoD+KZzHWqBaUpntcKp6lXtUzdFW00F74axnENUQ=
 github.com/gtsteffaniak/go-logger v1.1.0 h1:baFds+iibuLLNpNLwygz32bDqdsunI6dGWcdxwMIVKI=
 github.com/gtsteffaniak/go-logger v1.1.0/go.mod h1:rapapTju4D7bwt6h4JOdZNUXDjnp0WkTBd6TN5yWglI=
 github.com/hashicorp/go-uuid v1.0.3 h1:2gKiV6YVmrJ1i2CKKa9obLvRieoRGviZFL26PcT/Co8=
@@ -171,8 +171,8 @@ github.com/kovidgoyal/go-parallel v1.1.1 h1:1OzpNjtrUkBPq3UaqrnvOoB2F9RttSt811ui
 github.com/kovidgoyal/go-parallel v1.1.1/go.mod h1:BJNIbe6+hxyFWv7n6oEDPj3PA5qSw5OCtf0hcVxWJiw=
 github.com/kovidgoyal/go-shm v1.0.0 h1:HJEel9D1F9YhULvClEHJLawoRSj/1u/EDV7MJbBPgQo=
 github.com/kovidgoyal/go-shm v1.0.0/go.mod h1:Yzb80Xf9L3kaoB2RGok9hHwMIt7Oif61kT6t3+VnZds=
-github.com/kovidgoyal/imaging v1.8.23 h1:4WsboyQ/E8tic2kX49P93Rvscg33SPsCwTBG5EZZF54=
-github.com/kovidgoyal/imaging v1.8.23/go.mod h1:k3Iot3H0v2rSWXIxQISfT3e9wIryqzAHLHCuhG7z9lM=
+github.com/kovidgoyal/imaging v1.9.0 h1:TxHvhClPANvDW7eLm7PYDTZU1KE15xbqlFv95DA6DmY=
+github.com/kovidgoyal/imaging v1.9.0/go.mod h1:t2vWMc3uISm/jMP87nBCcZUcAK6EDUdgumwaXSuz0Jc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
@@ -189,8 +189,8 @@ github.com/mattn/go-sqlite3 v1.14.52 h1:wVbm2Qnf4OXkqhBTSPuCRZDRnxfbVrrmiCEroVdo
 github.com/mattn/go-sqlite3 v1.14.52/go.mod h1:6JTjA44L93a0QCyJef5YvlPoKXntQPjzWv5gtm9sB6w=
 github.com/ncruces/go-strftime v1.1.0 h1:vtPmPWMkb539RGV9WpWT9EwJGvrOCKvMNI4obWL47Hk=
 github.com/ncruces/go-strftime v1.1.0/go.mod h1:yVaq7iwCN09vHRrKBrrflXT0M9tTMG2KmZ9Fj7xeG/g=
-github.com/philhofer/fwd v1.2.0 h1:e6DnBTl7vGY+Gz322/ASL4Gyp1FspeMvx1RNDoToZuM=
-github.com/philhofer/fwd v1.2.0/go.mod h1:RqIHx9QI14HlwKwm98g9Re5prTQ6LdeRQn+gXJFxsJM=
+github.com/philhofer/fwd v1.2.1 h1:UtpS73q8bFgy/yH3gCq8LSNvj5gv/FowNOiWZa7uKwQ=
+github.com/philhofer/fwd v1.2.1/go.mod h1:RqIHx9QI14HlwKwm98g9Re5prTQ6LdeRQn+gXJFxsJM=
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -233,13 +233,13 @@ go.yaml.in/yaml/v3 v3.0.5 h1:N6y/pJk8buWs9NY5ERU2HSMfm+IuD/OtfdAnq6kESPw=
 go.yaml.in/yaml/v3 v3.0.5/go.mod h1:HVTZu1O7/Vkt2N+BFy8Zza+lnLsABggaTM2ZpNIGuKg=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.57.0 h1:3ZVCjf8Ggz7zneR/EHRVx68Ctf+2pmIMP2UFhh9cC6M=
-golang.org/x/crypto v0.57.0/go.mod h1:Fdz0i5U6CoizGwLda9DttjSk6qlZo25zYNtR+ycvuZA=
-golang.org/x/image v0.46.0 h1:b1+oYj0Jbp6K5MDT4i4/eZpYlk3V8SJhhDKh6LBHAyQ=
-golang.org/x/image v0.46.0/go.mod h1:3B3W05VGVQyuXucLINLjXKrqISASfi4Xj+iCVkLMwew=
+golang.org/x/crypto v0.58.0 h1:COkYLr4k7nDI4r6QtMML2AfzeIswWHAJthLS6K/M/54=
+golang.org/x/crypto v0.58.0/go.mod h1:Xh+kl5A+M0gMiWDytH2Hhr5Z7WbNCpv/eB/EFgfSk+w=
+golang.org/x/image v0.47.0 h1:za/8gVz++PPZqmZJBNSISICN5Rrj5zixP/8K++fgmqo=
+golang.org/x/image v0.47.0/go.mod h1:IkN5o4A7vq55vXN8FWjjnhg9Rs2GOtffqsSi9mWAKYE=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.41.0 h1:qJmnOUb4YB+FsEuM3HcWucdZASCPGhsX6uljO6pog0c=
-golang.org/x/mod v0.41.0/go.mod h1:Ek9pY8RKWXwsWvd3rQiHYtMqkjSUV+s1Rj7j4H5Ur6o=
+golang.org/x/mod v0.42.0 h1:ICeL3t2L30ljSPHHxDnR4fqVcBt/zR2zJAb9juavmQg=
+golang.org/x/mod v0.42.0/go.mod h1:u5fzIrRInkL8MaO1cbRkUHT64v303YIT5KEqpNr7jRs=
 golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20191105084925-a882066a44e0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -251,14 +251,14 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.0.0-20221002022538-bcab6841153b/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
 golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
-golang.org/x/net v0.59.0 h1:5zfYln+w5XCxwrnMMJPufRgNoXEaGxl0wo5GqPXyues=
-golang.org/x/net v0.59.0/go.mod h1:2DA/G1UfVbCpQPeWTmMPGY7Cs2PkBkwu743bVX5PIVg=
+golang.org/x/net v0.61.0 h1:RR+6j/BTBCrggOLugxa+66R8FvoN6MHlzDlZIbN9YFw=
+golang.org/x/net v0.61.0/go.mod h1:WgDCOTH8iwtB66T4/GfI94AHo/hhdb7Hah9NDseQfiI=
 golang.org/x/oauth2 v0.37.0 h1:JUlcxA8oAtauLfiH8FX2/FkAWHAdi0QtGCGc+hofE98=
 golang.org/x/oauth2 v0.37.0/go.mod h1:IxwZNxUULJmpBFf9K/9NTMSIfZZuvuTy1gGxhigP/58=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.23.0 h1:KameEIfc1IkluZyXWLn39Wd4tURc6GbCiISGiZm2bQk=
-golang.org/x/sync v0.23.0/go.mod h1:sUUOizhqBxiL6pEWpqNLUiaJn1ShEbZ6BBqskPbjZm0=
+golang.org/x/sync v0.24.0 h1:iqiDrGoDgyuvAKrhLQthUEzU/R378N78gXbBjxed7oA=
+golang.org/x/sync v0.24.0/go.mod h1:sUUOizhqBxiL6pEWpqNLUiaJn1ShEbZ6BBqskPbjZm0=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -270,28 +270,28 @@ golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.48.0 h1:bbX/i/6MgT9BVLM9RT1thmxL04yeTAhbEz4SyadbXoo=
-golang.org/x/sys v0.48.0/go.mod h1:hNLxWAXmnKAxqDtdwIYC4bM9oQPEecfsnNMuSxOs3og=
+golang.org/x/sys v0.49.0 h1:XbzkgYJHdqh/8m2Uu0W/dQv8nktxx4BFHp1M0gROTXA=
+golang.org/x/sys v0.49.0/go.mod h1:hNLxWAXmnKAxqDtdwIYC4bM9oQPEecfsnNMuSxOs3og=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/term v0.46.0 h1:3+OXuTbaKDgwk8jTi3aSLHRlmWqHEUDUtxnbFigO4YE=
-golang.org/x/term v0.46.0/go.mod h1:+K02xbkittuwc0Am4abfA3Fc+XRGXkvBXNO88NCXPoc=
+golang.org/x/term v0.47.0 h1:cpyOwQkr2Nzxe2p6KnrTG7Ei2wtzjsuSjhpXXepZ/BM=
+golang.org/x/term v0.47.0/go.mod h1:efAfAuG6RKABvg1ArGebRkvX6LXul14SM67o2e4mUCY=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.42.0 h1:JbOZXgfeCPU9gacVtYliJqOhD+zhrEqK4LfdpmlUZqI=
-golang.org/x/text v0.42.0/go.mod h1:ojzP1Z+2QtioaF8DTtO8K5q7JWVVYwZKenzujK0Zd0E=
+golang.org/x/text v0.43.0 h1:1QivrlhwAsnMOcqgOdl9my7s9OyZl8O5/UGUTJVXoWc=
+golang.org/x/text v0.43.0/go.mod h1:hbSIYA/amXcRXTFSZqh8tWHEoqRvvbKPJ2uz/KU+a+s=
 golang.org/x/time v0.16.0 h1:vMb6ptszcQMkcwiRTAuNNU50gom6++Q/6gY2hDM6VDE=
 golang.org/x/time v0.16.0/go.mod h1:rVKOqvZeKvrDKTQiAHJ7wmwP0RzleSphoEA9RcdLA0s=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.50.0 h1:c2ifzfcuY7L90lZ2aKd8S4K2NpASF08SZx9ZuJkHmSU=
-golang.org/x/tools v0.50.0/go.mod h1:7ulVMw3831Mwi5EZD6RomGyffr4VFjuNYXf2BbCEAV0=
+golang.org/x/tools v0.52.0 h1:ryxg4U63oaUYk7uOLTF37n43f4qgtGvqV4Ioit1BaEs=
+golang.org/x/tools v0.52.0/go.mod h1:ItcP5UNaVGG+Yc4eIYmaFLNJ4soEopkx5Y2d4lcEurs=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
@@ -311,20 +311,20 @@ gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-modernc.org/cc/v4 v4.29.7 h1:q+NXGJ0bK3b4TXFYQQVr9pYETGnmwFWkrUzJnMya/Tg=
-modernc.org/cc/v4 v4.29.7/go.mod h1:OnovgIhbbMXMu1aISnJ0wvVD1KnW+cAUJkIrAWh+kVI=
-modernc.org/ccgo/v4 v4.36.1 h1:ZNIUZAryN0UgnJwtyxrdEzcFc3yD4Cu4AzjfPXsLsIE=
-modernc.org/ccgo/v4 v4.36.1/go.mod h1:rrtGc2QkS239nYb/mQNuBMyjq3/y3ZXWbBjPoV3wqzA=
+modernc.org/cc/v4 v4.30.3 h1:aDq8gIX1X7+VFgO/JYYji6pLWL2H4tv3g8WatT3KCys=
+modernc.org/cc/v4 v4.30.3/go.mod h1:OnovgIhbbMXMu1aISnJ0wvVD1KnW+cAUJkIrAWh+kVI=
+modernc.org/ccgo/v4 v4.37.0 h1:BAuJCUtIHIxFIYaFhqXIw5YaoMBlNCUlFovejHfMip4=
+modernc.org/ccgo/v4 v4.37.0/go.mod h1:/8627VhwWtAbqUXmPORxFQU5SgLrAx2jl9seLw9GBhY=
 modernc.org/fileutil v1.4.0 h1:j6ZzNTftVS054gi281TyLjHPp6CPHr2KCxEXjEbD6SM=
 modernc.org/fileutil v1.4.0/go.mod h1:EqdKFDxiByqxLk8ozOxObDSfcVOv/54xDs/DUHdvCUU=
 modernc.org/gc/v2 v2.6.5 h1:nyqdV8q46KvTpZlsw66kWqwXRHdjIlJOhG6kxiV/9xI=
 modernc.org/gc/v2 v2.6.5/go.mod h1:YgIahr1ypgfe7chRuJi2gD7DBQiKSLMPgBQe9oIiito=
-modernc.org/gc/v3 v3.1.5 h1:21ldfPfRYE31Tb7B3mwAK8gy1AxP4+dKjrOQPfqakoc=
-modernc.org/gc/v3 v3.1.5/go.mod h1:HFK/6AGESC7Ex+EZJhJ2Gni6cTaYpSMmU/cT9RmlfYY=
+modernc.org/gc/v3 v3.2.0 h1:/Y3LGDMQaoYf55PebP1qsZ5FDGgAZyG1RYKEHeQzh1o=
+modernc.org/gc/v3 v3.2.0/go.mod h1:HFK/6AGESC7Ex+EZJhJ2Gni6cTaYpSMmU/cT9RmlfYY=
 modernc.org/goabi0 v0.2.0 h1:HvEowk7LxcPd0eq6mVOAEMai46V+i7Jrj13t4AzuNks=
 modernc.org/goabi0 v0.2.0/go.mod h1:CEFRnnJhKvWT1c1JTI3Avm+tgOWbkOu5oPA8eH8LnMI=
-modernc.org/libc v1.77.1 h1:Ct8j47QtiZ1Enj2DtFXQtUqrPCAjdCmPjtCuvrYQ0Hs=
-modernc.org/libc v1.77.1/go.mod h1:87/pZ4L6nD1zqW4nItuS12YO7hN1igAah34xjnQo/W0=
+modernc.org/libc v1.79.0 h1:9Dvvv++bAMSkSuBzuOFAatbTV5OIoq6Y6FohmD3e7q8=
+modernc.org/libc v1.79.0/go.mod h1:uT3kR61NsbeKJSLqq83GJwSnZMVLlSjyAz4DfTaBy1M=
 modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
 modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
 modernc.org/memory v1.12.1 h1:nFMiWrpStgZczNl6XI9GnIk/rWhYIyHGUaR04pGbp9g=
@@ -163,8 +163,18 @@ func RecordPatchItem(r *http.Request, actor *Actor, action string, item MoveCopy
 	RecordUser(r, actor, entry)
 }

+// recordFileEvent records a file operation. Anonymous share visitors have no user ID,
+// so their uploads and deletes are attributed to the share owner.
+func recordFileEvent(r *http.Request, actor *Actor, entry activitydb.Entry) {
+	if actor != nil && actor.Share.Hash != "" && (actor.User == nil || actor.User.ID == 0) {
+		RecordShareOwner(r, actor, entry)
+		return
+	}
+	RecordUser(r, actor, entry)
+}
+
 func RecordDelete(r *http.Request, actor *Actor, source, path string) {
-	RecordUser(r, actor, activitydb.Entry{
+	recordFileEvent(r, actor, activitydb.Entry{
 		EventType: activitydb.EventDelete,
 		Source:    source,
 		Path:      path,
@@ -198,7 +208,7 @@ func RecordBulkDelete(r *http.Request, actor *Actor, succeeded []BulkDeleteItem)
 		entry.Details.Source = succeeded[0].Source
 		entry.Details.Path = succeeded[0].Path
 	}
-	RecordUser(r, actor, entry)
+	recordFileEvent(r, actor, entry)
 }

 func RecordUpload(r *http.Request, actor *Actor, source, path string, isDir bool) {
@@ -210,7 +220,7 @@ func RecordUpload(r *http.Request, actor *Actor, source, path string, isDir bool
 		Source: source,
 		Path:   pathLabel,
 	}
-	RecordUser(r, actor, activitydb.Entry{
+	recordFileEvent(r, actor, activitydb.Entry{
 		EventType: activitydb.EventUpload,
 		Source:    source,
 		Path:      pathLabel,
@@ -218,6 +228,20 @@ func RecordUpload(r *http.Request, actor *Actor, source, path string, isDir bool
 	})
 }

+// RecordFileModify appends an audit row for an in-place file content update (PUT).
+func RecordFileModify(r *http.Request, actor *Actor, source, path string) {
+	entry := activitydb.Entry{
+		EventType: activitydb.EventFileModify,
+		Source:    source,
+		Path:      path,
+		Details: activitydb.Details{
+			Source: source,
+			Path:   path,
+		},
+	}
+	recordFileEvent(r, actor, entry)
+}
+
 func RecordShareMutation(r *http.Request, actor *Actor, eventType activitydb.EventType, hash, sourceName, path string, changes []activitydb.FieldChange) {
 	details := activitydb.Details{
 		Source:    sourceName,
@@ -1,9 +1,13 @@
 package activity

 import (
+	"net/http/httptest"
 	"testing"
+	"time"

 	activitydb "github.com/gtsteffaniak/filebrowser/backend/internal/database/activity"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/share"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
 )

 func TestAccessRuleCreateChanges(t *testing.T) {
@@ -28,6 +32,86 @@ func TestAccessRuleDeleteChanges(t *testing.T) {
 	assertFieldChange(t, changes[4], "count", "", "3")
 }

+func TestShareFileEventsRecordedForShareOwner(t *testing.T) {
+	store := &mockActivityStore{}
+	globalMu.Lock()
+	old := globalRecorder
+	globalMu.Unlock()
+	defer func() {
+		globalMu.Lock()
+		globalRecorder = old
+		globalMu.Unlock()
+	}()
+
+	rec := &Recorder{
+		store:         store,
+		buffer:        make([]activitydb.Entry, 0, 4),
+		flushCh:       make(chan struct{}, 1),
+		stopCh:        make(chan struct{}),
+		doneCh:        make(chan struct{}),
+		maxBuffer:     10000,
+		flushInterval: time.Hour,
+		enabled:       true,
+	}
+	globalMu.Lock()
+	globalRecorder = rec
+	globalMu.Unlock()
+	go rec.loop()
+
+	actor := &Actor{
+		User:  &users.User{FrontendUser: users.FrontendUser{Username: "anonymous"}},
+		Share: share.Share{Hash: "share-hash", UserID: 7},
+	}
+	r := httptest.NewRequest("POST", "/public/api/resources", nil)
+	RecordUpload(r, actor, "main", "/pub/new.txt", false)
+	RecordDelete(r, actor, "main", "/pub/old.txt")
+	RecordBulkDelete(r, actor, []BulkDeleteItem{{Source: "main", Path: "/pub/a.txt"}})
+	loggedIn := &Actor{
+		User:  &users.User{ID: 5, FrontendUser: users.FrontendUser{Username: "bob"}},
+		Share: share.Share{Hash: "share-hash", UserID: 7},
+	}
+	RecordUpload(r, loggedIn, "main", "/pub/bob.txt", false)
+	RecordFileModify(r, loggedIn, "main", "/pub/edited.txt")
+	RecordFileModify(r, actor, "main", "/pub/anon-edit.txt")
+	rec.Stop()
+
+	var got []activitydb.Entry
+	for _, batch := range store.inserts {
+		got = append(got, batch...)
+	}
+	want := []activitydb.EventType{
+		activitydb.EventUpload,
+		activitydb.EventDelete,
+		activitydb.EventBulkDelete,
+		activitydb.EventUpload,
+		activitydb.EventFileModify,
+		activitydb.EventFileModify,
+	}
+	if len(got) != len(want) {
+		t.Fatalf("expected %d entries, got %d: %+v", len(want), len(got), got)
+	}
+	for i, e := range got {
+		if e.EventType != want[i] {
+			t.Fatalf("entry %d: event type %q, want %q", i, e.EventType, want[i])
+		}
+	}
+	for i := 0; i < 3; i++ {
+		e := got[i]
+		if e.UserID != 7 || e.Details.ShareHash != "share-hash" {
+			t.Fatalf("anonymous share entry %d: userID=%d shareHash=%q", i, e.UserID, e.Details.ShareHash)
+		}
+	}
+	if got[3].UserID != 5 {
+		t.Fatalf("logged-in share visitor upload: userID=%d, want 5", got[3].UserID)
+	}
+	if got[4].UserID != 5 {
+		t.Fatalf("logged-in share visitor modify: userID=%d, want 5", got[4].UserID)
+	}
+	if got[5].UserID != 7 || got[5].Details.ShareHash != "share-hash" {
+		t.Fatalf("anonymous share modify: userID=%d shareHash=%q", got[5].UserID, got[5].Details.ShareHash)
+	}
+}
+
 func assertFieldChange(t *testing.T, change activitydb.FieldChange, field, from, to string) {
 	t.Helper()
 	if change.Field != field || change.From != from || change.To != to {
@@ -3,7 +3,6 @@ package activity
 import (
 	"net"
 	"net/http"
-	"strings"

 	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 )
@@ -11,14 +10,19 @@ import (
 func remoteIP(r *http.Request) string {
 	cfg := &settings.Config

+	// Forwarded client headers are only honored when the socket peer is a
+	// configured trusted proxy; otherwise a direct client could spoof its IP.
+	trustedPeer := cfg.Http.TrustProxyHeaders && settings.IsTrustedProxyPeer(r)
+
 	xff := r.Header.Get("X-Forwarded-For")
-	if cfg.Http.TrustProxyHeaders && xff != "" {
-		ips := strings.Split(xff, ",")
-		return strings.TrimSpace(ips[0])
+	if trustedPeer && xff != "" {
+		if ip := settings.TrustedProxyClientIP(xff); ip != "" {
+			return ip
+		}
 	}

 	xri := r.Header.Get("X-Real-IP")
-	if cfg.Http.TrustProxyHeaders && xri != "" {
+	if trustedPeer && xri != "" {
 		return xri
 	}

@@ -12,11 +12,11 @@ import (
 	"time"

 	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
-	liberrors "github.com/gtsteffaniak/filebrowser/backend/internal/errors"
-	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 	dbsql "github.com/gtsteffaniak/filebrowser/backend/internal/database/sql"
+	liberrors "github.com/gtsteffaniak/filebrowser/backend/internal/errors"
 	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing"
 	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing/iteminfo"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 )

 func Test_GetRealPath(t *testing.T) {
@@ -129,7 +129,7 @@ func TestWriteFilePreservesExecutableBit(t *testing.T) {
 	waitForScannerReady(t, idx)

 	indexPath := "/" + scriptName
-	if err := WriteFile(sourceName, indexPath, strings.NewReader("#!/bin/sh\necho bye\n")); err != nil {
+	if err := WriteFile(sourceName, "", indexPath, strings.NewReader("#!/bin/sh\necho bye\n")); err != nil {
 		t.Fatalf("WriteFile: %v", err)
 	}

@@ -182,7 +182,7 @@ func TestWriteFileRejectsExistingDirectory(t *testing.T) {
 	defer stopPoll()
 	waitForScannerReady(t, idx)

-	err := WriteFile(sourceName, "/"+dirName, strings.NewReader("file content"))
+	err := WriteFile(sourceName, "", "/"+dirName, strings.NewReader("file content"))
 	if err == nil {
 		t.Fatal("expected error when path is an existing directory")
 	}
@@ -571,7 +571,7 @@ func TestDeleteFilesRootProtection(t *testing.T) {
 	}

 	// Test: Attempting to delete the root directory should return an error
-	err := DeleteFiles("test_root_protection", realTmpDir, true)
+	err := DeleteFiles("test_root_protection", "", "/", true)
 	if err == nil {
 		t.Error("DeleteFiles should return an error when trying to delete root directory")
 	}
@@ -583,13 +583,13 @@ func TestDeleteFilesRootProtection(t *testing.T) {
 	}

 	// Test with trailing slash - should still be blocked
-	err = DeleteFiles("test_root_protection", realTmpDir+"/", true)
+	err = DeleteFiles("test_root_protection", "", "/", true)
 	if err == nil {
 		t.Error("DeleteFiles should return an error for root directory with trailing slash")
 	}

 	// Test with cleaned path variations
-	err = DeleteFiles("test_root_protection", realTmpDir+"/.", true)
+	err = DeleteFiles("test_root_protection", "", "/", true)
 	if err == nil {
 		t.Error("DeleteFiles should return an error for root directory with /. suffix")
 	}
@@ -670,7 +670,7 @@ func runDeleteFilesSubfolderWithRaceStress(t *testing.T, iter int) {

 	waitForScannerReady(t, idx)

-	err := DeleteFiles(sourceName, subfolderPath, true)
+	err := DeleteFiles(sourceName, "", "/"+subfolderName, true)
 	stopPolling()

 	t.Logf("iteration %d: DeleteFiles finished in %s (err=%v)", iter, time.Since(start), err)
@@ -694,13 +694,130 @@ func runDeleteFilesSubfolderWithRaceStress(t *testing.T, iter int) {
 	t.Logf("iteration %d: cleaned scanners and indices", iter)
 }

+// TestDeleteFiles_RemovesSymlinkNotTarget verifies that deleting a symlink leaf
+// removes the link itself and never follows it to the target.
+func TestDeleteFiles_RemovesSymlinkNotTarget(t *testing.T) {
+	root := t.TempDir()
+	outside := filepath.Join(filepath.Dir(root), "outside-victim.txt")
+	if err := os.WriteFile(outside, []byte("keep me"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink(outside, filepath.Join(root, "link")); err != nil {
+		t.Fatal(err)
+	}
+
+	sourceName := "test_delete_symlink"
+	indexing.SetTestIndex(sourceName, root)
+	t.Cleanup(indexing.ClearTestIndices)
+	idx := indexing.GetIndex(sourceName)
+	idx.Config.ResolvedRules.IndexingDisabled = true
+
+	if err := DeleteFiles(sourceName, "", "/link", false); err != nil {
+		t.Fatalf("DeleteFiles: %v", err)
+	}
+	if _, err := os.Lstat(filepath.Join(root, "link")); !os.IsNotExist(err) {
+		t.Fatal("symlink should have been removed")
+	}
+	got, err := os.ReadFile(outside)
+	if err != nil || string(got) != "keep me" {
+		t.Fatalf("delete followed the symlink and removed the target: %v %q", err, got)
+	}
+}
+
+// TestDeleteFiles_RejectsEscapingIntermediate verifies a delete under an
+// intermediate symlink escaping the source is refused.
+func TestDeleteFiles_RejectsEscapingIntermediate(t *testing.T) {
+	root := t.TempDir()
+	outsideDir := filepath.Join(filepath.Dir(root), "outside-dir")
+	if err := os.MkdirAll(outsideDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink(outsideDir, filepath.Join(root, "evil")); err != nil {
+		t.Fatal(err)
+	}
+	victim := filepath.Join(outsideDir, "victim.txt")
+	if err := os.WriteFile(victim, []byte("keep"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	sourceName := "test_delete_escape"
+	indexing.SetTestIndex(sourceName, root)
+	t.Cleanup(indexing.ClearTestIndices)
+	idx := indexing.GetIndex(sourceName)
+	idx.Config.ResolvedRules.IndexingDisabled = true
+
+	err := DeleteFiles(sourceName, "", "/evil/victim.txt", false)
+	if !errors.Is(err, liberrors.ErrPathEscapesScope) {
+		t.Fatalf("expected ErrPathEscapesScope, got %v", err)
+	}
+	if _, err := os.Stat(victim); err != nil {
+		t.Fatal("delete escaped the bound and removed the outside file")
+	}
+}
+
+// TestWriteFile_RejectsSymlinkEscape verifies a write through a symlink leaf
+// resolving outside the source is refused before any bytes are written.
+func TestWriteFile_RejectsSymlinkEscape(t *testing.T) {
+	root := t.TempDir()
+	outside := filepath.Join(filepath.Dir(root), "outside.txt")
+	if err := os.WriteFile(outside, []byte("original"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink(outside, filepath.Join(root, "evil")); err != nil {
+		t.Fatal(err)
+	}
+
+	sourceName := "test_write_symlink"
+	indexing.SetTestIndex(sourceName, root)
+	t.Cleanup(indexing.ClearTestIndices)
+	idx := indexing.GetIndex(sourceName)
+	idx.Config.ResolvedRules.IndexingDisabled = true
+
+	err := WriteFile(sourceName, "", "/evil", strings.NewReader("pwned"))
+	if !errors.Is(err, liberrors.ErrPathEscapesScope) {
+		t.Fatalf("expected ErrPathEscapesScope, got %v", err)
+	}
+	got, _ := os.ReadFile(outside)
+	if string(got) != "original" {
+		t.Fatal("write went through the symlink")
+	}
+}
+
+// TestWriteFile_RejectsMissingLeafUnderEscapingParent verifies the j764/3j46
+// primitive: writing a new file under a symlinked directory that escapes the
+// source is refused even though the leaf does not exist yet.
+func TestWriteFile_RejectsMissingLeafUnderEscapingParent(t *testing.T) {
+	root := t.TempDir()
+	outsideDir := filepath.Join(filepath.Dir(root), "outside-parent")
+	if err := os.MkdirAll(outsideDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink(outsideDir, filepath.Join(root, "evil_dir")); err != nil {
+		t.Fatal(err)
+	}
+
+	sourceName := "test_write_escape_parent"
+	indexing.SetTestIndex(sourceName, root)
+	t.Cleanup(indexing.ClearTestIndices)
+	idx := indexing.GetIndex(sourceName)
+	idx.Config.ResolvedRules.IndexingDisabled = true
+
+	err := WriteFile(sourceName, "", "/evil_dir/hack.txt", strings.NewReader("pwned"))
+	if !errors.Is(err, liberrors.ErrPathEscapesScope) {
+		t.Fatalf("expected ErrPathEscapesScope, got %v", err)
+	}
+	if _, err := os.Lstat(filepath.Join(outsideDir, "hack.txt")); !os.IsNotExist(err) {
+		t.Fatal("write landed outside the source through the symlinked parent")
+	}
+}
+
 func waitForScannerReady(t *testing.T, idx *indexing.Index) {
 	t.Helper()
 	// Give the scanners a moment to initialize, but don't wait for full "ready" status
 	// The initial scan can take longer than the test timeout, but DeleteFiles will work
 	// as long as the scanners are initialized and running
 	time.Sleep(500 * time.Millisecond)
-	
+
 	// Verify scanners exist
 	status := idx.GetScannerStatus()
 	if totalScanners, ok := status["totalScanners"].(int); !ok || totalScanners == 0 {
@@ -71,13 +71,18 @@ func processDirectoryMetadata(response *iteminfo.ExtendedFileInfo, idx *indexing
 	}
 	var wg sync.WaitGroup

-	wg.Go(func() {
-		indexPath := idx.MakeIndexPath(response.Path, true).String()
-		err := idx.RefreshDirectory(indexPath, false)
-		if err != nil {
-			logger.Debugf("Failed to refresh directory for folder size update: %v", err)
-		}
-	})
+	// Expanded listings already persisted index rows and the folder size from
+	// the freshly read directory (persistDirectoryListing); only unexpanded
+	// directory requests still need a refresh walk.
+	if !opts.Expand {
+		wg.Go(func() {
+			indexPath := idx.MakeIndexPath(response.Path, true).String()
+			err := idx.RefreshDirectory(indexPath, false)
+			if err != nil {
+				logger.Debugf("Failed to refresh directory for folder size update: %v", err)
+			}
+		})
+	}

 	if opts.Metadata && metadataCount > 0 {
 		addMetadataToChildren(response, opts, &wg)
@@ -330,6 +335,15 @@ func fileInfoFasterImpl(opts utils.FileOptions, user *users.User, s *Service) (*
 		if info.Type == "directory" && opts.HideFileExt != "" {
 			response.Files = filterFilesByExt(response.Files, opts.HideFileExt)
 		}
+		if info.Type == "directory" && opts.Expand {
+			// Expanded listings without extended attrs skip persistDirectoryListing
+			// (their placeholder preview values must not overwrite index rows), so
+			// refresh the index lazily — otherwise folder sizes here never update.
+			// Capture indexPath now: the deferred finalizeResponse strips the user
+			// scope from response.Path before returning.
+			// Coalesced per path so repeated listings do not run parallel refreshes.
+			idx.RefreshDirectoryAsync(idx.MakeIndexPath(response.Path, true).String())
+		}
 		return response, nil
 	}
 	// Process directory metadata if requested
@@ -629,47 +643,53 @@ func extractVideoMetadata(ctx context.Context, item *iteminfo.ExtendedItemInfo,
 	return nil
 }

-func DeleteFiles(source, absPath string, isDir bool) error {
+// DeleteFiles deletes the file or directory at indexPath. boundIndexPath limits
+// symlink resolution to the caller's scope ("" or "/" = source root only). The
+// entry itself is removed: a symlink leaf is deleted, never followed, and an
+// intermediate symlinked component cannot carry the delete outside the bound.
+func DeleteFiles(source, boundIndexPath, indexPath string, isDir bool) error {
 	index := indexing.GetIndex(source)
 	if index == nil {
 		return fmt.Errorf("could not get index: %v ", source)
 	}
-	// Safety guard: never allow deletion of the source root directory itself
-	cleanAbs := filepath.Clean(absPath)
-	if cleanAbs == filepath.Clean(index.Path) {
-		return fmt.Errorf("refusing to delete source root directory: %s", absPath)
+	if utils.CleanIndexPathSegment(indexPath) == "" {
+		return fmt.Errorf("refusing to delete source root directory: %s", indexPath)
 	}
-
-	if !index.Config.ResolvedRules.IndexingDisabled {
-		indexPath := index.MakeIndexPath(absPath, isDir).String()
-
-		// Perform the physical deletion
-		err := os.RemoveAll(absPath)
-		if err != nil {
-			return err
-		}
-
-		// Clear cache entries
-		indexing.RealPathCache.Delete(absPath)
-		indexing.IsDirCache.Delete(absPath + ":isdir")
-
-		// Remove metadata from index
-		deleteSuccess := index.DeleteMetadata(indexPath, isDir, isDir)
-		if !deleteSuccess {
-			logger.Errorf("Failed to delete metadata from index for %s, but filesystem deletion succeeded", indexPath)
-		}
-
-		// Refresh the parent directory to recalculate sizes and update counts
-		refreshConfig := utils.FileOptions{
-			Path:  index.MakeIndexPath(filepath.Dir(absPath), true).String(),
-			IsDir: true,
-		}
-		err = index.RefreshFileInfo(refreshConfig)
+	realPath, err := index.GetRealPathForRemoval(boundIndexPath, indexPath)
+	if err != nil {
 		return err
 	}

-	// Indexing disabled, just delete the file
-	return os.RemoveAll(absPath)
+	if index.Config.ResolvedRules.IndexingDisabled {
+		// Indexing disabled, just delete the file
+		return os.RemoveAll(realPath)
+	}
+
+	indexPath = index.MakeIndexPath(indexPath, isDir).String()
+
+	// Perform the physical deletion
+	err = os.RemoveAll(realPath)
+	if err != nil {
+		return err
+	}
+
+	// Clear cache entries
+	indexing.RealPathCache.Delete(realPath)
+	indexing.IsDirCache.Delete(realPath + ":isdir")
+
+	// Remove metadata from index
+	deleteSuccess := index.DeleteMetadata(indexPath, isDir, isDir)
+	if !deleteSuccess {
+		logger.Errorf("Failed to delete metadata from index for %s, but filesystem deletion succeeded", indexPath)
+	}
+
+	// Refresh the parent directory to recalculate sizes and update counts
+	refreshConfig := utils.FileOptions{
+		Path:  index.MakeIndexPath(filepath.Dir(strings.TrimSuffix(indexPath, "/")), true).String(),
+		IsDir: true,
+	}
+	err = index.RefreshFileInfo(refreshConfig)
+	return err
 }

 func RefreshIndex(source string, path string, isDir bool, recursive bool) error {
@@ -896,15 +916,19 @@ func CopyResource(isSrcDir bool, sourceIndex, destIndex, realsrc, realdst string
 	return nil
 }

-func WriteDirectory(opts utils.FileOptions) error {
+// WriteDirectory creates a directory at opts.Path. boundIndexPath limits symlink
+// resolution to the caller's scope ("" or "/" = source root only).
+func WriteDirectory(boundIndexPath string, opts utils.FileOptions) error {
 	idx := indexing.GetIndex(opts.Source)
 	if idx == nil {
 		return fmt.Errorf("could not get index: %v ", opts.Source)
 	}
-	realPath, _, _ := idx.GetRealPath(opts.Path)
+	realPath, err := idx.GetRealPathForMutation(boundIndexPath, opts.Path)
+	if err != nil {
+		return err
+	}

 	var stat os.FileInfo
-	var err error
 	// Check if the destination exists and is a file
 	if stat, err = os.Stat(realPath); err == nil && !stat.IsDir() {
 		// If it's a file and we're trying to create a directory, remove the file first
@@ -948,21 +972,24 @@ func WriteDirectory(opts utils.FileOptions) error {
 // WriteFileFunc is a variable that can be mocked in tests
 var WriteFileFunc = writeFile

-func WriteFile(source, path string, in io.Reader) error {
-	return WriteFileFunc(source, path, in)
+// WriteFile writes stream contents to the file at index path path. boundIndexPath
+// limits symlink resolution to the caller's scope ("" or "/" = source root only).
+func WriteFile(source, boundIndexPath, path string, in io.Reader) error {
+	return WriteFileFunc(source, boundIndexPath, path, in)
 }

-func writeFile(source, path string, in io.Reader) error {
+func writeFile(source, boundIndexPath, path string, in io.Reader) error {
 	idx := indexing.GetIndex(source)
 	if idx == nil {
 		return fmt.Errorf("could not get index: %v ", source)
 	}
-	realPath, _, _ := idx.GetRealPath(path)
-	// Strip trailing slash from realPath if it's meant to be a file
-	realPath = strings.TrimRight(realPath, "/")
+	realPath, err := idx.GetRealPathForMutation(boundIndexPath, path)
+	if err != nil {
+		return err
+	}
 	// Ensure the parent directories exist
 	parentDir := filepath.Dir(realPath)
-	err := os.MkdirAll(parentDir, fileutils.PermDir)
+	err = os.MkdirAll(parentDir, fileutils.PermDir)
 	if err != nil {
 		return err
 	}
@@ -5,8 +5,8 @@ import (
 	"os"
 	"path/filepath"

-	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 	"github.com/gtsteffaniak/go-logger/logger"
 )

@@ -19,11 +19,13 @@ func MakeUserDir(fullPath string) error {
 }

 func MakeUserDirs(u *users.User, createDir bool) error {
+	if u.Permissions.Admin {
+		return nil
+	}
 	cleanedUserName := users.CleanUsername(u.Username)
 	if cleanedUserName == "" || cleanedUserName == "-" || cleanedUserName == "." {
 		return fmt.Errorf("MakeUserDirs: invalid user for home dir creation: [%s]", u.Username)
 	}
-	settings.ExpandBackendScopesForCreateUserDir(u)
 	for i, scope := range u.BackendScopes {
 		source, ok := settings.Config.Server.SourceMap[scope.Path]
 		if !ok {
@@ -0,0 +1,54 @@
+package files
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+)
+
+func TestMakeUserDirsSkipsAdmins(t *testing.T) {
+	root := t.TempDir()
+	saved := settings.Config
+	t.Cleanup(func() { settings.Config = saved })
+	settings.Config = settings.Settings{
+		Server: settings.Server{
+			Sources: []*settings.Source{{
+				Path: root,
+				Config: settings.SourceConfig{
+					CreateUserDir: true,
+				},
+			}},
+			SourceMap: map[string]*settings.Source{
+				root: {
+					Path: root,
+					Config: settings.SourceConfig{
+						CreateUserDir: true,
+					},
+				},
+			},
+		},
+	}
+
+	u := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username: "admin",
+			Permissions: users.Permissions{
+				Admin: true,
+			},
+		},
+		BackendScopes: []users.BackendScope{{Path: root, Scope: "/"}},
+	}
+
+	if err := MakeUserDirs(u, true); err != nil {
+		t.Fatalf("MakeUserDirs: %v", err)
+	}
+	if got := u.BackendScopes[0].Scope; got != "/" {
+		t.Fatalf("scope=%q want /", got)
+	}
+	if _, err := os.Stat(filepath.Join(root, "admin")); !os.IsNotExist(err) {
+		t.Fatalf("admin directory stat error=%v, want not-exist", err)
+	}
+}
@@ -55,6 +55,22 @@ func unixModeToFileMode(u uint32) os.FileMode {
 	return m
 }

+// removeDestinationSymlinkIfPresent deletes dest when it is a symlink so a copy or
+// cross-device move replaces the link entry instead of writing through it.
+func removeDestinationSymlinkIfPresent(dest string) error {
+	info, err := os.Lstat(dest)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	if info.Mode()&os.ModeSymlink != 0 {
+		return os.Remove(dest)
+	}
+	return nil
+}
+
 // MoveFile moves a file from src to dst.
 // By default, the rename system call is used. If src and dst are on different volumes,
 // CopyFile is used as a fallback and the source is removed synchronously on success.
@@ -134,6 +150,10 @@ func copySingleFile(source, dest string) error {
 		return err
 	}

+	if err = removeDestinationSymlinkIfPresent(dest); err != nil {
+		return err
+	}
+
 	// Create the destination file with source permissions
 	dst, err := os.OpenFile(dest, os.O_RDWR|os.O_CREATE|os.O_TRUNC, sourcePerms)
 	if err != nil {
@@ -356,6 +356,74 @@ func TestCopySymlinkReplacesExistingDestination(t *testing.T) {
 	}
 }

+func TestCopyFile_ReplacesDestinationSymlinkWithoutFollowingTarget(t *testing.T) {
+	dir := t.TempDir()
+	outside := filepath.Join(filepath.Dir(dir), "outside-victim.txt")
+	if err := os.WriteFile(outside, []byte("keep me"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	link := filepath.Join(dir, "link")
+	if err := os.Symlink(outside, link); err != nil {
+		t.Fatal(err)
+	}
+	src := filepath.Join(dir, "src.txt")
+	if err := os.WriteFile(src, []byte("copied"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := CopyFile(src, link); err != nil {
+		t.Fatalf("CopyFile: %v", err)
+	}
+	info, err := os.Lstat(link)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.Mode()&os.ModeSymlink != 0 {
+		t.Fatal("destination should be a regular file replacing the symlink entry")
+	}
+	got, err := os.ReadFile(outside)
+	if err != nil || string(got) != "keep me" {
+		t.Fatalf("copy followed the symlink target: %v %q", err, got)
+	}
+	if body, err := os.ReadFile(link); err != nil || string(body) != "copied" {
+		t.Fatalf("link path content = %q, err=%v", body, err)
+	}
+}
+
+func TestMoveFile_ReplacesDestinationSymlinkWithoutFollowingTarget(t *testing.T) {
+	dir := t.TempDir()
+	outside := filepath.Join(filepath.Dir(dir), "outside-victim.txt")
+	if err := os.WriteFile(outside, []byte("keep me"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	link := filepath.Join(dir, "link")
+	if err := os.Symlink(outside, link); err != nil {
+		t.Fatal(err)
+	}
+	src := filepath.Join(dir, "src.txt")
+	if err := os.WriteFile(src, []byte("moved"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := MoveFile(src, link); err != nil {
+		t.Fatalf("MoveFile: %v", err)
+	}
+	if _, err := os.Lstat(src); !os.IsNotExist(err) {
+		t.Fatal("source should be gone after move")
+	}
+	info, err := os.Lstat(link)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.Mode()&os.ModeSymlink != 0 {
+		t.Fatal("destination should be a regular file replacing the symlink entry")
+	}
+	got, err := os.ReadFile(outside)
+	if err != nil || string(got) != "keep me" {
+		t.Fatalf("move followed the symlink target: %v %q", err, got)
+	}
+}
+
 func TestCopyFileContentsFallsBackAfterCopyFileRangeBadFileDescriptor(t *testing.T) {
 	const content = "complete file contents"
 	src := struct{ io.Reader }{bytes.NewBufferString(content)}
@@ -301,7 +301,7 @@ func detectRuntime() string {

 func mapSystemOS(goos string) string {
 	switch goos {
-	case "linux", "windows", "darwin":
+	case "linux", "windows", "darwin", "freebsd":
 		return goos
 	default:
 		return "other"
@@ -0,0 +1,25 @@
+package analytics
+
+import "testing"
+
+func TestMapSystemOS(t *testing.T) {
+	tests := []struct {
+		name string
+		goos string
+		want string
+	}{
+		{name: "linux", goos: "linux", want: "linux"},
+		{name: "windows", goos: "windows", want: "windows"},
+		{name: "darwin", goos: "darwin", want: "darwin"},
+		{name: "freebsd release build", goos: "freebsd", want: "freebsd"},
+		{name: "unsupported goos", goos: "plan9", want: "other"},
+		{name: "empty", goos: "", want: "other"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := mapSystemOS(tt.goos); got != tt.want {
+				t.Errorf("mapSystemOS(%q) = %q, want %q", tt.goos, got, tt.want)
+			}
+		})
+	}
+}
@@ -57,6 +57,7 @@ func MakeSignedTokenAPI(user *users.User, name string, duration time.Duration, p
 			},
 		},
 	}
+	claim.Minimal = &minimal
 	if !minimal {
 		claim.Permissions = users.SanitizeTokenPermissions(perms)
 	}
@@ -3,7 +3,6 @@ package access
 import (
 	"fmt"
 	"maps"
-	"path/filepath"
 	"slices"
 	"sort"
 	"strings"
@@ -125,6 +124,9 @@ type RuleUpsert struct {
 type SQLPersister interface {
 	SaveAccessRule(source, path string, rule *AccessRule) error
 	DeleteAccessRule(source, path string) error
+	MigrateAccessRulePathsLowercase(source string, oldPaths []string, newRules RuleMap) error
+	AccessRulesLowercaseMigrated() (bool, error)
+	SetAccessRulesLowercaseMigrated() error
 	SaveGroup(name string, members StringSet) error
 	DeleteGroup(name string) error
 	DeleteGroupWithRules(name string, save []RuleUpsert, remove []RuleKey) error
@@ -264,7 +266,7 @@ func (s *Storage) restoreRuleSQLNL(key RuleKey, rule *AccessRule) error {

 // RemoveRuleByPath removes a rule by normalized index path.
 func (s *Storage) RemoveRuleByPath(sourcePath string, indexPath utils.IndexPath) {
-	s.RemoveRuleByPathKey(sourcePath, ruleKey(indexPath))
+	s.RemoveRuleByPathKey(sourcePath, s.ruleKeyForNL(sourcePath, indexPath))
 }

 // RemoveRuleByPathKey removes a rule by its exact storage key (for legacy migration paths).
@@ -277,6 +279,7 @@ func (s *Storage) RemoveRuleByPathKey(sourcePath, pathKey string) {
 		return
 	}

+	pathKey = strings.ToLower(pathKey)
 	if _, exists := rulesBySource[pathKey]; !exists {
 		return
 	}
@@ -289,7 +292,7 @@ func (s *Storage) RemoveRuleByPathKey(sourcePath, pathKey string) {
 	if s.sqlStore != nil {
 		_ = s.sqlStore.DeleteAccessRule(sourcePath, pathKey)
 		normalized := utils.AddTrailingSlashIfNotExists(pathKey)
-		if normalized != pathKey {
+		if normalized != pathKey && rulesBySource[normalized] == nil {
 			_ = s.sqlStore.DeleteAccessRule(sourcePath, normalized)
 		}
 	}
@@ -298,7 +301,7 @@ func (s *Storage) RemoveRuleByPathKey(sourcePath, pathKey string) {
 // getOrCreateRuleNL ensures a rule exists for the given source and index path.
 // The caller must hold the lock.
 func (s *Storage) getOrCreateRuleNL(sourcePath string, indexPath utils.IndexPath) *AccessRule {
-	normalizedPath := ruleKey(indexPath)
+	normalizedPath := s.ruleKeyForNL(sourcePath, indexPath)
 	if _, ok := s.AllRules[sourcePath]; !ok {
 		s.AllRules[sourcePath] = make(RuleMap)
 	}
@@ -309,6 +312,19 @@ func (s *Storage) getOrCreateRuleNL(sourcePath string, indexPath utils.IndexPath
 			Allow: RuleSet{Users: make(StringSet), Groups: make(StringSet)},
 		}
 		s.AllRules[sourcePath][normalizedPath] = rule
+	} else {
+		if rule.Deny.Users == nil {
+			rule.Deny.Users = make(StringSet)
+		}
+		if rule.Deny.Groups == nil {
+			rule.Deny.Groups = make(StringSet)
+		}
+		if rule.Allow.Users == nil {
+			rule.Allow.Users = make(StringSet)
+		}
+		if rule.Allow.Groups == nil {
+			rule.Allow.Groups = make(StringSet)
+		}
 	}
 	return rule
 }
@@ -324,7 +340,7 @@ func (s *Storage) DenyUser(sourcePath string, indexPath utils.IndexPath, usernam
 	}
 	rule.Deny.Users[username] = struct{}{}
 	s.clearAllCaches()
-	s.persistRuleSQLNL(sourcePath, ruleKey(indexPath))
+	s.persistRuleSQLNL(sourcePath, s.ruleKeyForNL(sourcePath, indexPath))
 	return nil
 }

@@ -339,7 +355,7 @@ func (s *Storage) AllowUser(sourcePath string, indexPath utils.IndexPath, userna
 	}
 	rule.Allow.Users[username] = struct{}{}
 	s.clearAllCaches()
-	s.persistRuleSQLNL(sourcePath, ruleKey(indexPath))
+	s.persistRuleSQLNL(sourcePath, s.ruleKeyForNL(sourcePath, indexPath))
 	return nil
 }

@@ -357,7 +373,7 @@ func (s *Storage) DenyGroup(sourcePath string, indexPath utils.IndexPath, groupn
 	}
 	rule.Deny.Groups[groupname] = struct{}{}
 	s.clearAllCaches()
-	s.persistRuleSQLNL(sourcePath, ruleKey(indexPath))
+	s.persistRuleSQLNL(sourcePath, s.ruleKeyForNL(sourcePath, indexPath))
 	return nil
 }

@@ -375,7 +391,7 @@ func (s *Storage) AllowGroup(sourcePath string, indexPath utils.IndexPath, group
 	}
 	rule.Allow.Groups[groupname] = struct{}{}
 	s.clearAllCaches()
-	s.persistRuleSQLNL(sourcePath, ruleKey(indexPath))
+	s.persistRuleSQLNL(sourcePath, s.ruleKeyForNL(sourcePath, indexPath))
 	return nil
 }

@@ -389,13 +405,13 @@ func (s *Storage) DenyAll(sourcePath string, indexPath utils.IndexPath) error {
 	}
 	rule.DenyAll = true
 	s.clearAllCaches()
-	s.persistRuleSQLNL(sourcePath, ruleKey(indexPath))
+	s.persistRuleSQLNL(sourcePath, s.ruleKeyForNL(sourcePath, indexPath))
 	return nil
 }

 // Permitted checks if a username is permitted for a given sourcePath and indexPath, recursively checking parent directories.
 func (s *Storage) Permitted(sourcePath string, indexPath utils.IndexPath, username string) bool {
-	indexPath = checkPath(indexPath)
+	indexPath = s.checkPathForSource(sourcePath, indexPath)
 	pathStr := indexPath.String()

 	// Get current version for the sourcePath
@@ -468,7 +484,7 @@ func (s *Storage) getRuleAtExactPath(sourcePath string, indexPath utils.IndexPat
 	if !ok {
 		return nil, false
 	}
-	rule, ok := rulesBySource[ruleKey(indexPath)]
+	rule, ok := rulesBySource[s.ruleKeyForNL(sourcePath, indexPath)]
 	return rule, ok
 }

@@ -527,7 +543,7 @@ func (s *Storage) GetFrontendRules(sourcePath string, indexPath utils.IndexPath)
 	}

 	// Check if path exists on filesystem
-	pathExists := utils.CheckPathExists(filepath.Join(sourcePath, indexPath.String()))
+	pathExists := checkRulePathExists(sourcePath, indexPath.String())

 	frontendRules := FrontendAccessRule{
 		SourceDenyDefault: sourceDenyDefault,
@@ -545,7 +561,7 @@ func (s *Storage) GetFrontendRules(sourcePath string, indexPath utils.IndexPath)
 	if !ok {
 		return frontendRules, false
 	}
-	rule, ok := rulesBySource[ruleKey(indexPath)]
+	rule, ok := rulesBySource[s.ruleKeyForNL(sourcePath, indexPath)]
 	if !ok || rule == nil {
 		return frontendRules, false
 	}
@@ -592,7 +608,7 @@ func (s *Storage) GetAllRules(sourcePath string) (map[string]FrontendAccessRule,
 		frontendPath := indexPath

 		// Check if path exists on filesystem
-		pathExists := utils.CheckPathExists(filepath.Join(sourcePath, indexPath))
+		pathExists := checkRulePathExists(sourcePath, indexPath)

 		// Convert AccessRule to FrontendAccessRule
 		frontendRules[frontendPath] = FrontendAccessRule{
@@ -1020,7 +1036,7 @@ func (s *Storage) RenameUserInRules(oldName, newName string) error {
 func (s *Storage) RemoveAllowUser(sourcePath string, indexPath utils.IndexPath, username string) (bool, error) {
 	s.mux.Lock()
 	defer s.mux.Unlock()
-	normalizedPath := ruleKey(indexPath)
+	normalizedPath := s.ruleKeyForNL(sourcePath, indexPath)
 	rule, ok := s.AllRules[sourcePath][normalizedPath]
 	if !ok {
 		return false, nil
@@ -1031,11 +1047,8 @@ func (s *Storage) RemoveAllowUser(sourcePath string, indexPath utils.IndexPath,
 	}
 	removed := exists
 	// If rule is now empty, remove it
-	if len(rule.Allow.Users) == 0 && len(rule.Allow.Groups) == 0 && len(rule.Deny.Users) == 0 && len(rule.Deny.Groups) == 0 {
-		delete(s.AllRules[sourcePath], normalizedPath)
-		if len(s.AllRules[sourcePath]) == 0 {
-			delete(s.AllRules, sourcePath)
-		}
+	if !accessRuleHasPayload(rule) {
+		s.deleteStoredRuleNL(sourcePath, normalizedPath)
 	}
 	if removed {
 		s.clearAllCaches()
@@ -1049,7 +1062,7 @@ func (s *Storage) RemoveAllowUser(sourcePath string, indexPath utils.IndexPath,
 func (s *Storage) RemoveAllowGroup(sourcePath string, indexPath utils.IndexPath, groupname string) (bool, error) {
 	s.mux.Lock()
 	defer s.mux.Unlock()
-	normalizedPath := ruleKey(indexPath)
+	normalizedPath := s.ruleKeyForNL(sourcePath, indexPath)
 	rule, ok := s.AllRules[sourcePath][normalizedPath]
 	if !ok {
 		return false, nil
@@ -1060,11 +1073,8 @@ func (s *Storage) RemoveAllowGroup(sourcePath string, indexPath utils.IndexPath,
 	}
 	removed := exists
 	// If rule is now empty, remove it
-	if len(rule.Allow.Users) == 0 && len(rule.Allow.Groups) == 0 && len(rule.Deny.Users) == 0 && len(rule.Deny.Groups) == 0 {
-		delete(s.AllRules[sourcePath], normalizedPath)
-		if len(s.AllRules[sourcePath]) == 0 {
-			delete(s.AllRules, sourcePath)
-		}
+	if !accessRuleHasPayload(rule) {
+		s.deleteStoredRuleNL(sourcePath, normalizedPath)
 	}
 	if removed {
 		s.clearAllCaches()
@@ -1078,7 +1088,7 @@ func (s *Storage) RemoveAllowGroup(sourcePath string, indexPath utils.IndexPath,
 func (s *Storage) RemoveDenyUser(sourcePath string, indexPath utils.IndexPath, username string) (bool, error) {
 	s.mux.Lock()
 	defer s.mux.Unlock()
-	normalizedPath := ruleKey(indexPath)
+	normalizedPath := s.ruleKeyForNL(sourcePath, indexPath)
 	rule, ok := s.AllRules[sourcePath][normalizedPath]
 	if !ok {
 		return false, nil
@@ -1089,11 +1099,8 @@ func (s *Storage) RemoveDenyUser(sourcePath string, indexPath utils.IndexPath, u
 	}
 	removed := exists
 	// If rule is now empty, remove it
-	if len(rule.Allow.Users) == 0 && len(rule.Allow.Groups) == 0 && len(rule.Deny.Users) == 0 && len(rule.Deny.Groups) == 0 {
-		delete(s.AllRules[sourcePath], normalizedPath)
-		if len(s.AllRules[sourcePath]) == 0 {
-			delete(s.AllRules, sourcePath)
-		}
+	if !accessRuleHasPayload(rule) {
+		s.deleteStoredRuleNL(sourcePath, normalizedPath)
 	}
 	if removed {
 		s.clearAllCaches()
@@ -1107,7 +1114,7 @@ func (s *Storage) RemoveDenyUser(sourcePath string, indexPath utils.IndexPath, u
 func (s *Storage) RemoveDenyGroup(sourcePath string, indexPath utils.IndexPath, groupname string) (bool, error) {
 	s.mux.Lock()
 	defer s.mux.Unlock()
-	normalizedPath := ruleKey(indexPath)
+	normalizedPath := s.ruleKeyForNL(sourcePath, indexPath)
 	rule, ok := s.AllRules[sourcePath][normalizedPath]
 	if !ok {
 		return false, nil
@@ -1118,11 +1125,8 @@ func (s *Storage) RemoveDenyGroup(sourcePath string, indexPath utils.IndexPath,
 	}
 	removed := exists
 	// If rule is now empty, remove it
-	if len(rule.Allow.Users) == 0 && len(rule.Allow.Groups) == 0 && len(rule.Deny.Users) == 0 && len(rule.Deny.Groups) == 0 {
-		delete(s.AllRules[sourcePath], normalizedPath)
-		if len(s.AllRules[sourcePath]) == 0 {
-			delete(s.AllRules, sourcePath)
-		}
+	if !accessRuleHasPayload(rule) {
+		s.deleteStoredRuleNL(sourcePath, normalizedPath)
 	}
 	if removed {
 		s.clearAllCaches()
@@ -1136,7 +1140,7 @@ func (s *Storage) RemoveDenyGroup(sourcePath string, indexPath utils.IndexPath,
 func (s *Storage) RemoveDenyAll(sourcePath string, indexPath utils.IndexPath) (bool, error) {
 	s.mux.Lock()
 	defer s.mux.Unlock()
-	normalizedPath := ruleKey(indexPath)
+	normalizedPath := s.ruleKeyForNL(sourcePath, indexPath)
 	rule, ok := s.AllRules[sourcePath][normalizedPath]
 	if !ok {
 		return false, nil
@@ -1147,11 +1151,8 @@ func (s *Storage) RemoveDenyAll(sourcePath string, indexPath utils.IndexPath) (b
 		removed = true
 	}
 	// If rule is now empty, remove it
-	if len(rule.Allow.Users) == 0 && len(rule.Allow.Groups) == 0 && len(rule.Deny.Users) == 0 && len(rule.Deny.Groups) == 0 {
-		delete(s.AllRules[sourcePath], normalizedPath)
-		if len(s.AllRules[sourcePath]) == 0 {
-			delete(s.AllRules, sourcePath)
-		}
+	if !accessRuleHasPayload(rule) {
+		s.deleteStoredRuleNL(sourcePath, normalizedPath)
 	}
 	if removed {
 		s.clearAllCaches()
@@ -1193,10 +1194,7 @@ func (s *Storage) RemoveAllRulesForUser(username string) error {
 		if rule.DenyAll || len(rule.Allow.Users) > 0 || len(rule.Allow.Groups) > 0 || len(rule.Deny.Users) > 0 || len(rule.Deny.Groups) > 0 {
 			continue
 		}
-		delete(s.AllRules[key.Source], key.Path)
-		if len(s.AllRules[key.Source]) == 0 {
-			delete(s.AllRules, key.Source)
-		}
+		s.deleteStoredRuleNL(key.Source, key.Path)
 	}
 	var persisted []RuleKey
 	for _, key := range keys {
@@ -1240,10 +1238,7 @@ func (s *Storage) removeAllRulesForGroupNL(groupname string) ([]RuleKey, map[Rul
 			delete(rule.Deny.Groups, groupname)
 			// A rule left with only DenyAll must stay, otherwise removing the group would open the path.
 			if !accessRuleHasPayload(rule) {
-				delete(s.AllRules[sourcePath], indexPath)
-				if len(s.AllRules[sourcePath]) == 0 {
-					delete(s.AllRules, sourcePath)
-				}
+				s.deleteStoredRuleNL(sourcePath, indexPath)
 			}
 			touched = append(touched, key)
 		}
@@ -1485,7 +1480,7 @@ func (s *Storage) RemoveUserCascade(sourcePath string, indexPath utils.IndexPath
 	s.mux.Lock()
 	defer s.mux.Unlock()

-	normalizedPath := ruleKey(indexPath)
+	normalizedPath := s.ruleKeyForNL(sourcePath, indexPath)
 	rulesBySource, ok := s.AllRules[sourcePath]
 	if !ok {
 		return 0, nil
@@ -1521,7 +1516,7 @@ func (s *Storage) RemoveUserCascade(sourcePath string, indexPath utils.IndexPath
 			// If rule is now empty, mark it for deletion
 			if len(rule.Allow.Users) == 0 && len(rule.Allow.Groups) == 0 &&
 				len(rule.Deny.Users) == 0 && len(rule.Deny.Groups) == 0 && !rule.DenyAll {
-				delete(s.AllRules[sourcePath], rulePath)
+				s.deleteStoredRuleNL(sourcePath, rulePath)
 				pathChanged = true
 			}
 			if pathChanged {
@@ -1530,11 +1525,6 @@ func (s *Storage) RemoveUserCascade(sourcePath string, indexPath utils.IndexPath
 		}
 	}

-	// If no rules left for this source, remove the source entry
-	if len(s.AllRules[sourcePath]) == 0 {
-		delete(s.AllRules, sourcePath)
-	}
-
 	if changed {
 		s.clearAllCaches()
 		for rp := range touchedPaths {
@@ -1553,7 +1543,7 @@ func (s *Storage) RemoveGroupCascade(sourcePath string, indexPath utils.IndexPat
 	s.mux.Lock()
 	defer s.mux.Unlock()

-	normalizedPath := ruleKey(indexPath)
+	normalizedPath := s.ruleKeyForNL(sourcePath, indexPath)
 	rulesBySource, ok := s.AllRules[sourcePath]
 	if !ok {
 		return 0, nil
@@ -1589,7 +1579,7 @@ func (s *Storage) RemoveGroupCascade(sourcePath string, indexPath utils.IndexPat
 			// If rule is now empty, mark it for deletion
 			if len(rule.Allow.Users) == 0 && len(rule.Allow.Groups) == 0 &&
 				len(rule.Deny.Users) == 0 && len(rule.Deny.Groups) == 0 && !rule.DenyAll {
-				delete(s.AllRules[sourcePath], rulePath)
+				s.deleteStoredRuleNL(sourcePath, rulePath)
 				pathChanged = true
 			}
 			if pathChanged {
@@ -1598,11 +1588,6 @@ func (s *Storage) RemoveGroupCascade(sourcePath string, indexPath utils.IndexPat
 		}
 	}

-	// If no rules left for this source, remove the source entry
-	if len(s.AllRules[sourcePath]) == 0 {
-		delete(s.AllRules, sourcePath)
-	}
-
 	if changed {
 		s.clearAllCaches()
 		for rp := range touchedPaths {
@@ -1625,11 +1610,15 @@ func (s *Storage) UpdateRules(sourcePath string, oldPath, newPath utils.IndexPat
 		return 0, nil // No rules for this source, not an error
 	}

-	oldKey := ruleKey(oldPath)
-	newKey := ruleKey(newPath)
+	oldKey := s.ruleKeyForNL(sourcePath, oldPath)
+	newKey := s.ruleKeyForNL(sourcePath, newPath)
+	if oldKey == newKey {
+		return 0, nil
+	}

 	updated := 0
 	rulesToUpdate := make(map[string]string) // old path -> new path
+	movedRules := make(map[string]*AccessRule)

 	// Find all rules that need to be updated
 	for rulePath := range rulesBySource {
@@ -1641,11 +1630,20 @@ func (s *Storage) UpdateRules(sourcePath string, oldPath, newPath utils.IndexPat
 		}
 	}

-	// Update all matched rules
-	for oldRulePath, newRulePath := range rulesToUpdate {
-		rule := rulesBySource[oldRulePath]
+	// Remove all matched rules first so overlapping moves cannot clobber each other
+	for oldRulePath := range rulesToUpdate {
+		movedRules[oldRulePath] = rulesBySource[oldRulePath]
 		delete(rulesBySource, oldRulePath)
-		rulesBySource[newRulePath] = rule
+	}
+
+	// Insert or merge into target paths
+	for oldRulePath, newRulePath := range rulesToUpdate {
+		rule := movedRules[oldRulePath]
+		if existing, exists := rulesBySource[newRulePath]; exists {
+			mergeAccessRulesInPlace(existing, rule)
+		} else {
+			rulesBySource[newRulePath] = rule
+		}
 		logger.Info("access rule updated", "source", sourcePath, "fromPath", oldRulePath, "toPath", newRulePath)
 		updated++
 	}
@@ -1653,7 +1651,7 @@ func (s *Storage) UpdateRules(sourcePath string, oldPath, newPath utils.IndexPat
 	if updated > 0 {
 		s.clearAllCaches()
 		for oldRulePath := range rulesToUpdate {
-			if s.sqlStore != nil {
+			if s.sqlStore != nil && rulesBySource[oldRulePath] == nil {
 				_ = s.sqlStore.DeleteAccessRule(sourcePath, oldRulePath)
 			}
 		}
@@ -1670,8 +1668,8 @@ func (s *Storage) UpdateRulePath(sourcePath string, oldPath, newPath utils.Index
 	s.mux.Lock()
 	defer s.mux.Unlock()

-	oldKey := ruleKey(oldPath)
-	newKey := ruleKey(newPath)
+	oldKey := s.ruleKeyForNL(sourcePath, oldPath)
+	newKey := s.ruleKeyForNL(sourcePath, newPath)

 	rulesBySource, ok := s.AllRules[sourcePath]
 	if !ok {
@@ -1682,9 +1680,16 @@ func (s *Storage) UpdateRulePath(sourcePath string, oldPath, newPath utils.Index
 	if !ok {
 		return fmt.Errorf("no rule found for path: %s", oldKey)
 	}
+	if oldKey == newKey {
+		return nil
+	}

 	delete(rulesBySource, oldKey)
-	rulesBySource[newKey] = rule
+	if existing, exists := rulesBySource[newKey]; exists {
+		mergeAccessRulesInPlace(existing, rule)
+	} else {
+		rulesBySource[newKey] = rule
+	}
 	s.clearAllCaches()
 	if s.sqlStore != nil {
 		_ = s.sqlStore.DeleteAccessRule(sourcePath, oldKey)
@@ -16,6 +16,11 @@ type stubGroupSQL struct {

 func (s *stubGroupSQL) SaveAccessRule(string, string, *access.AccessRule) error { return nil }
 func (s *stubGroupSQL) DeleteAccessRule(string, string) error                  { return nil }
+func (s *stubGroupSQL) AccessRulesLowercaseMigrated() (bool, error) { return false, nil }
+func (s *stubGroupSQL) SetAccessRulesLowercaseMigrated() error      { return nil }
+func (s *stubGroupSQL) MigrateAccessRulePathsLowercase(string, []string, access.RuleMap) error {
+	return nil
+}
 func (s *stubGroupSQL) SaveGroup(string, access.StringSet) error {
 	return s.saveErr
 }
@@ -43,6 +48,11 @@ type recordingGroupSQL struct {

 func (s *recordingGroupSQL) SaveAccessRule(string, string, *access.AccessRule) error { return nil }
 func (s *recordingGroupSQL) DeleteAccessRule(string, string) error                  { return nil }
+func (s *recordingGroupSQL) AccessRulesLowercaseMigrated() (bool, error) { return false, nil }
+func (s *recordingGroupSQL) SetAccessRulesLowercaseMigrated() error      { return nil }
+func (s *recordingGroupSQL) MigrateAccessRulePathsLowercase(string, []string, access.RuleMap) error {
+	return nil
+}
 func (s *recordingGroupSQL) SaveGroup(name string, members access.StringSet) error {
 	if s.groups == nil {
 		s.groups = make(map[string]access.StringSet)
@@ -0,0 +1,192 @@
+package access
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+	"github.com/gtsteffaniak/go-logger/logger"
+)
+
+// Access rules are stored and matched using lowercase path keys (strings.ToLower).
+
+// checkRulePathExists reports whether rulePath exists under sourcePath, matching
+// path segments case-insensitively when the exact path is not found on case-sensitive filesystems.
+func checkRulePathExists(sourcePath, rulePath string) bool {
+	if utils.CheckPathExists(filepath.Join(sourcePath, rulePath)) {
+		return true
+	}
+	rel := strings.Trim(strings.TrimSpace(rulePath), "/")
+	if rel == "" {
+		return utils.CheckPathExists(sourcePath)
+	}
+	current := sourcePath
+	for _, part := range strings.Split(rel, "/") {
+		if part == "" {
+			continue
+		}
+		candidate := filepath.Join(current, part)
+		if utils.CheckPathExists(candidate) {
+			current = candidate
+			continue
+		}
+		entries, err := os.ReadDir(current)
+		if err != nil {
+			return false
+		}
+		partLower := strings.ToLower(part)
+		matched := ""
+		for _, e := range entries {
+			if strings.ToLower(e.Name()) == partLower {
+				matched = e.Name()
+				break
+			}
+		}
+		if matched == "" {
+			return false
+		}
+		current = filepath.Join(current, matched)
+	}
+	return true
+}
+
+// ruleKeyForNL returns the storage key; caller must hold s.mux.
+func (s *Storage) ruleKeyForNL(_ string, indexPath utils.IndexPath) string {
+	return strings.ToLower(ruleKey(indexPath))
+}
+
+// ruleKeyFor returns the storage/lookup key for a rule path on this source.
+func (s *Storage) ruleKeyFor(sourcePath string, indexPath utils.IndexPath) string {
+	s.mux.RLock()
+	defer s.mux.RUnlock()
+	return s.ruleKeyForNL(sourcePath, indexPath)
+}
+
+func (s *Storage) checkPathForSourceNL(_ string, indexPath utils.IndexPath) utils.IndexPath {
+	p := checkPath(indexPath)
+	return utils.IndexPathFromNormalized(strings.ToLower(p.String()), p.IsDir)
+}
+
+// checkPathForSource normalizes an index path for permission checks on a source.
+func (s *Storage) checkPathForSource(sourcePath string, indexPath utils.IndexPath) utils.IndexPath {
+	s.mux.RLock()
+	defer s.mux.RUnlock()
+	return s.checkPathForSourceNL(sourcePath, indexPath)
+}
+
+// StartupMigrateAccessRuleKeys lowercases existing rule keys in memory and SQL,
+// merging colliding paths. Idempotent when keys are already lowercase.
+func (s *Storage) StartupMigrateAccessRuleKeys() error {
+	s.mux.Lock()
+	defer s.mux.Unlock()
+
+	for sourcePath := range s.AllRules {
+		if err := s.migrateSourceRulesLowercaseNL(sourcePath); err != nil {
+			return err
+		}
+	}
+	if s.sqlStore == nil {
+		return nil
+	}
+	migrated, err := s.sqlStore.AccessRulesLowercaseMigrated()
+	if err != nil {
+		return err
+	}
+	if migrated {
+		return nil
+	}
+	return s.sqlStore.SetAccessRulesLowercaseMigrated()
+}
+
+func (s *Storage) migrateSourceRulesLowercaseNL(sourcePath string) error {
+	rulesBySource, ok := s.AllRules[sourcePath]
+	if !ok || len(rulesBySource) == 0 {
+		return nil
+	}
+
+	if !rulesNeedLowercaseMigration(rulesBySource) {
+		return nil
+	}
+
+	oldPaths := make([]string, 0, len(rulesBySource))
+	newRules := make(RuleMap)
+
+	for path, rule := range rulesBySource {
+		oldPaths = append(oldPaths, path)
+		lower := strings.ToLower(path)
+		if existing, exists := newRules[lower]; exists {
+			logger.Infof("access rules: merging colliding paths %q into %q on source %s", path, lower, sourcePath)
+			mergeAccessRulesInPlace(existing, rule)
+			continue
+		}
+		fresh := &AccessRule{}
+		mergeAccessRulesInPlace(fresh, rule)
+		newRules[lower] = fresh
+		if lower != path {
+			logger.Infof("access rules: migrated rule path %q -> %q on source %s", path, lower, sourcePath)
+		}
+	}
+
+	s.AllRules[sourcePath] = newRules
+
+	if s.sqlStore == nil {
+		return nil
+	}
+	return s.sqlStore.MigrateAccessRulePathsLowercase(sourcePath, oldPaths, newRules)
+}
+
+func rulesNeedLowercaseMigration(rules RuleMap) bool {
+	byLower := make(map[string]string)
+	for path := range rules {
+		lower := strings.ToLower(path)
+		if path != lower {
+			return true
+		}
+		if other, ok := byLower[lower]; ok && other != path {
+			return true
+		}
+		byLower[lower] = path
+	}
+	return false
+}
+
+func mergeAccessRulesInPlace(dst, src *AccessRule) {
+	if src == nil || dst == nil {
+		return
+	}
+	if src.DenyAll {
+		dst.DenyAll = true
+	}
+	if dst.Deny.Users == nil {
+		dst.Deny.Users = StringSet{}
+	}
+	if dst.Deny.Groups == nil {
+		dst.Deny.Groups = StringSet{}
+	}
+	if dst.Allow.Users == nil {
+		dst.Allow.Users = StringSet{}
+	}
+	if dst.Allow.Groups == nil {
+		dst.Allow.Groups = StringSet{}
+	}
+	for u := range src.Deny.Users {
+		dst.Deny.Users[u] = struct{}{}
+	}
+	for g := range src.Deny.Groups {
+		dst.Deny.Groups[g] = struct{}{}
+	}
+	for u := range src.Allow.Users {
+		dst.Allow.Users[u] = struct{}{}
+	}
+	for g := range src.Allow.Groups {
+		dst.Allow.Groups[g] = struct{}{}
+	}
+}
+
+func (s *Storage) deleteStoredRuleNL(sourcePath, rulePath string) {
+	delete(s.AllRules[sourcePath], rulePath)
+	if len(s.AllRules[sourcePath]) == 0 {
+		delete(s.AllRules, sourcePath)
+	}
+}
@@ -0,0 +1,67 @@
+package access_test
+
+import (
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/access"
+)
+
+func TestStartupMigrationMergesCollidingRules(t *testing.T) {
+	store, userStore, sqlStore := createTestStorageWithSQL(t)
+	_ = store
+	_ = userStore
+
+	ruleA := &access.AccessRule{
+		Deny: access.RuleSet{Users: map[string]struct{}{"alice": {}}},
+	}
+	ruleB := &access.AccessRule{
+		Deny: access.RuleSet{Users: map[string]struct{}{"bob": {}}},
+	}
+	if err := sqlStore.SaveAccessRule("/src", "/Private/", ruleA); err != nil {
+		t.Fatal(err)
+	}
+	if err := sqlStore.SaveAccessRule("/src", "/private/", ruleB); err != nil {
+		t.Fatal(err)
+	}
+
+	s := access.NewStorage(nil)
+	rules, err := sqlStore.GetAllAccessRules()
+	if err != nil {
+		t.Fatal(err)
+	}
+	s.AllRules = rules
+	s.SetSQLStore(sqlStore)
+
+	if startErr := s.StartupMigrateAccessRuleKeys(); startErr != nil {
+		t.Fatal(startErr)
+	}
+	byPath, err := sqlStore.GetAccessRulesBySource("/src")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(byPath) != 1 {
+		t.Fatalf("expected one merged rule row, got %d", len(byPath))
+	}
+	merged := byPath["/private/"]
+	if merged == nil {
+		t.Fatal("expected merged rule at lowercase key")
+	}
+	if _, ok := merged.Deny.Users["alice"]; !ok {
+		t.Fatal("missing alice from merge")
+	}
+	if _, ok := merged.Deny.Users["bob"]; !ok {
+		t.Fatal("missing bob from merge")
+	}
+
+	migrated, err := sqlStore.AccessRulesLowercaseMigrated()
+	if err != nil || !migrated {
+		t.Fatal("marker should be set after first migration")
+	}
+	byPath2, err := sqlStore.GetAccessRulesBySource("/src")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(byPath2) != 1 {
+		t.Fatal("rules should remain after marker is set without re-running migration")
+	}
+}
@@ -0,0 +1,152 @@
+package access_test
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/access"
+)
+
+type migrateCallCounter struct {
+	access.SQLPersister
+	calls int
+}
+
+func (m *migrateCallCounter) MigrateAccessRulePathsLowercase(source string, oldPaths []string, newRules access.RuleMap) error {
+	m.calls++
+	return m.SQLPersister.MigrateAccessRulePathsLowercase(source, oldPaths, newRules)
+}
+
+type failAccessRuleMigratePersister struct {
+	access.SQLPersister
+}
+
+func (failAccessRuleMigratePersister) MigrateAccessRulePathsLowercase(string, []string, access.RuleMap) error {
+	return errors.New("simulated migration failure")
+}
+
+func TestFreshDBSetsAccessRulesLowercaseMarker(t *testing.T) {
+	s, _, sqlStore := createTestStorageWithSQL(t)
+	s.SetSQLStore(sqlStore)
+
+	if err := s.StartupMigrateAccessRuleKeys(); err != nil {
+		t.Fatal(err)
+	}
+	ok, err := sqlStore.AccessRulesLowercaseMigrated()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !ok {
+		t.Fatal("expected migration marker on empty database")
+	}
+}
+
+func TestUpgradeMigratesAndSetsMarker(t *testing.T) {
+	_, _, sqlStore := createTestStorageWithSQL(t)
+
+	rule := &access.AccessRule{
+		Deny: access.RuleSet{Users: map[string]struct{}{"alice": {}}},
+	}
+	if err := sqlStore.SaveAccessRule("/src", "/Private/", rule); err != nil {
+		t.Fatal(err)
+	}
+
+	s := access.NewStorage(nil)
+	rules, err := sqlStore.GetAllAccessRules()
+	if err != nil {
+		t.Fatal(err)
+	}
+	s.AllRules = rules
+	counter := &migrateCallCounter{SQLPersister: sqlStore}
+	s.SetSQLStore(counter)
+
+	if err = s.StartupMigrateAccessRuleKeys(); err != nil {
+		t.Fatal(err)
+	}
+	if counter.calls != 1 {
+		t.Fatalf("expected one SQL migration, got %d", counter.calls)
+	}
+	ok, err := sqlStore.AccessRulesLowercaseMigrated()
+	if err != nil || !ok {
+		t.Fatalf("marker should be set after upgrade, ok=%v err=%v", ok, err)
+	}
+	byPath, err := sqlStore.GetAccessRulesBySource("/src")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if byPath["/private/"] == nil {
+		t.Fatal("expected lowercased rule row")
+	}
+}
+
+func TestSecondStartupSkipsAccessRulesMigration(t *testing.T) {
+	_, _, sqlStore := createTestStorageWithSQL(t)
+	if err := sqlStore.SaveAccessRule("/src", "/Private/", &access.AccessRule{
+		Deny: access.RuleSet{Users: map[string]struct{}{"u": {}}},
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	s := access.NewStorage(nil)
+	rules, err := sqlStore.GetAllAccessRules()
+	if err != nil {
+		t.Fatal(err)
+	}
+	s.AllRules = rules
+	counter := &migrateCallCounter{SQLPersister: sqlStore}
+	s.SetSQLStore(counter)
+
+	if err = s.StartupMigrateAccessRuleKeys(); err != nil {
+		t.Fatal(err)
+	}
+	if counter.calls != 1 {
+		t.Fatalf("first startup: expected 1 migrate call, got %d", counter.calls)
+	}
+
+	already, err := sqlStore.AccessRulesLowercaseMigrated()
+	if err != nil || !already {
+		t.Fatal("marker should be set after first startup")
+	}
+
+	s2 := access.NewStorage(nil)
+	rules2, err := sqlStore.GetAllAccessRules()
+	if err != nil {
+		t.Fatal(err)
+	}
+	s2.AllRules = rules2
+	s2.SetSQLStore(counter)
+	if err = s2.StartupMigrateAccessRuleKeys(); err != nil {
+		t.Fatal(err)
+	}
+	if counter.calls != 1 {
+		t.Fatalf("second startup must not invoke SQL migration, got %d calls", counter.calls)
+	}
+}
+
+func TestMigrationFailureDoesNotSetMarker(t *testing.T) {
+	_, _, sqlStore := createTestStorageWithSQL(t)
+	if err := sqlStore.SaveAccessRule("/src", "/Private/", &access.AccessRule{
+		Deny: access.RuleSet{Users: map[string]struct{}{"u": {}}},
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	s := access.NewStorage(nil)
+	rules, err := sqlStore.GetAllAccessRules()
+	if err != nil {
+		t.Fatal(err)
+	}
+	s.AllRules = rules
+	s.SetSQLStore(failAccessRuleMigratePersister{SQLPersister: sqlStore})
+
+	if err = s.StartupMigrateAccessRuleKeys(); err == nil {
+		t.Fatal("expected migration failure")
+	}
+	ok, err := sqlStore.AccessRulesLowercaseMigrated()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if ok {
+		t.Fatal("marker must not be set when migration fails")
+	}
+}
@@ -0,0 +1,211 @@
+package access
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+)
+
+func TestPermittedDenyCaseVariant(t *testing.T) {
+	settings.Config = settings.Settings{
+		Server: settings.Server{
+			SourceMap: map[string]*settings.Source{
+				"/data": {Path: "/data", Config: settings.SourceConfig{DenyByDefault: false}},
+			},
+		},
+	}
+	s := NewStorage(nil)
+	if err := s.DenyUser("/data", utils.IndexPathFromNormalized("/private/secret.txt", false), "alice"); err != nil {
+		t.Fatal(err)
+	}
+	key := s.ruleKeyFor("/data", utils.IndexPathFromNormalized("/private/secret.txt", false))
+	if key != "/private/secret.txt/" {
+		t.Fatalf("stored key %q", key)
+	}
+	if s.Permitted("/data", utils.IndexPathFromNormalized("/PRIVATE/secret.txt", false), "alice") {
+		t.Fatal("case variant must hit deny rule")
+	}
+}
+
+func TestRemoveRuleByPathKeyCaseVariant(t *testing.T) {
+	settings.Config = settings.Settings{
+		Server: settings.Server{
+			SourceMap: map[string]*settings.Source{
+				"/data": {Path: "/data", Config: settings.SourceConfig{DenyByDefault: false}},
+			},
+		},
+	}
+	s := NewStorage(nil)
+	if err := s.DenyUser("/data", utils.IndexPathFromNormalized("/private/x", false), "alice"); err != nil {
+		t.Fatal(err)
+	}
+	s.RemoveRuleByPathKey("/data", "/PRIVATE/x/")
+	if !s.Permitted("/data", utils.IndexPathFromNormalized("/private/x", false), "alice") {
+		t.Fatal("rule should be removed when key casing differs")
+	}
+}
+
+func TestPermittedHotPathNoFilesystemAccess(t *testing.T) {
+	settings.Config = settings.Settings{
+		Server: settings.Server{
+			SourceMap: map[string]*settings.Source{
+				"/data": {Path: "/data", Config: settings.SourceConfig{DenyByDefault: false}},
+			},
+		},
+	}
+	s := NewStorage(nil)
+	_ = s.DenyUser("/data", utils.IndexPathFromNormalized("/a/b", false), "u")
+	if !s.Permitted("/data", utils.IndexPathFromNormalized("/A/B", false), "other") {
+		t.Fatal("expected permitted for non-denied user")
+	}
+}
+
+func BenchmarkPermittedLowercaseNoFS(b *testing.B) {
+	settings.Config = settings.Settings{
+		Server: settings.Server{
+			SourceMap: map[string]*settings.Source{
+				"/data": {Path: "/data", Config: settings.SourceConfig{DenyByDefault: false}},
+			},
+		},
+	}
+	s := NewStorage(nil)
+	_ = s.DenyUser("/data", utils.IndexPathFromNormalized("/x/y", false), "u")
+	path := utils.IndexPathFromNormalized("/X/Y", false)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		s.Permitted("/data", path, "bob")
+	}
+}
+
+func TestRulesNeedLowercaseMigration(t *testing.T) {
+	if rulesNeedLowercaseMigration(RuleMap{"/ok/": {}}) {
+		t.Fatal("already lowercase")
+	}
+	if !rulesNeedLowercaseMigration(RuleMap{"/Private/": {}}) {
+		t.Fatal("uppercase segment should need migration")
+	}
+	if !rulesNeedLowercaseMigration(RuleMap{"/Private/": {}, "/private/": {}}) {
+		t.Fatal("case collision should need migration")
+	}
+}
+
+func TestCheckRulePathExistsMixedCase(t *testing.T) {
+	root := t.TempDir()
+	mixedDir := filepath.Join(root, "MyFolder", "SubDir")
+	if err := os.MkdirAll(mixedDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	mixedFile := filepath.Join(mixedDir, "Readme.MD")
+	if err := os.WriteFile(mixedFile, []byte("ok"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	settings.Config = settings.Settings{
+		Server: settings.Server{
+			SourceMap: map[string]*settings.Source{
+				root: {Path: root, Config: settings.SourceConfig{DenyByDefault: false}},
+			},
+		},
+	}
+	s := NewStorage(nil)
+	if err := s.DenyUser(root, utils.IndexPathFromNormalized("/MyFolder/SubDir/Readme.MD", false), "alice"); err != nil {
+		t.Fatal(err)
+	}
+
+	all, err := s.GetAllRules(root)
+	if err != nil {
+		t.Fatal(err)
+	}
+	rule, ok := all["/myfolder/subdir/readme.md/"]
+	if !ok {
+		t.Fatalf("expected lowercased rule key in GetAllRules, got %v", all)
+	}
+	if !rule.PathExists {
+		t.Fatal("expected PathExists=true for mixed-case path on disk")
+	}
+
+	feRule, ok := s.GetFrontendRules(root, utils.IndexPathFromNormalized("/myfolder/subdir/readme.md", false))
+	if !ok {
+		t.Fatal("expected rule from GetFrontendRules with lowercase query")
+	}
+	if !feRule.PathExists {
+		t.Fatal("expected PathExists=true in GetFrontendRules")
+	}
+
+	if checkRulePathExists(root, "/myfolder/subdir/nonexistent.txt/") {
+		t.Fatal("expected false for missing path")
+	}
+}
+
+func TestUpdateRulesAndUpdateRulePathCaseOnlyAndCollision(t *testing.T) {
+	settings.Config = settings.Settings{
+		Server: settings.Server{
+			SourceMap: map[string]*settings.Source{
+				"/data": {Path: "/data", Config: settings.SourceConfig{DenyByDefault: false}},
+			},
+		},
+	}
+	s := NewStorage(nil)
+	if err := s.DenyUser("/data", utils.IndexPathFromNormalized("/MyFolder", true), "alice"); err != nil {
+		t.Fatal(err)
+	}
+
+	// Case-only rename is a no-op and preserves the rule.
+	updated, err := s.UpdateRules("/data", utils.IndexPathFromNormalized("/MyFolder", true), utils.IndexPathFromNormalized("/myfolder", true))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if updated != 0 {
+		t.Fatalf("expected 0 updated for case-only rename, got %d", updated)
+	}
+	if s.Permitted("/data", utils.IndexPathFromNormalized("/MyFolder", true), "alice") {
+		t.Fatal("rule should still deny alice after case-only rename")
+	}
+
+	if err := s.UpdateRulePath("/data", utils.IndexPathFromNormalized("/MyFolder", true), utils.IndexPathFromNormalized("/myfolder", true)); err != nil {
+		t.Fatal(err)
+	}
+	if s.Permitted("/data", utils.IndexPathFromNormalized("/myfolder", true), "alice") {
+		t.Fatal("rule should still deny alice after case-only UpdateRulePath")
+	}
+
+	// Colliding target rule merges entries instead of overwriting.
+	if err := s.DenyUser("/data", utils.IndexPathFromNormalized("/Archive", true), "bob"); err != nil {
+		t.Fatal(err)
+	}
+	if err := s.UpdateRulePath("/data", utils.IndexPathFromNormalized("/MyFolder", true), utils.IndexPathFromNormalized("/archive", true)); err != nil {
+		t.Fatal(err)
+	}
+	if s.Permitted("/data", utils.IndexPathFromNormalized("/archive", true), "alice") ||
+		s.Permitted("/data", utils.IndexPathFromNormalized("/archive", true), "bob") {
+		t.Fatal("expected merged rule at /archive/ to deny both alice and bob")
+	}
+}
+
+func TestRemoveAllowUserPreservesDenyAll(t *testing.T) {
+	settings.Config = settings.Settings{
+		Server: settings.Server{
+			SourceMap: map[string]*settings.Source{
+				"/data": {Path: "/data", Config: settings.SourceConfig{DenyByDefault: false}},
+			},
+		},
+	}
+	s := NewStorage(nil)
+	p := utils.IndexPathFromNormalized("/Secret", true)
+	if err := s.DenyAll("/data", p); err != nil {
+		t.Fatal(err)
+	}
+	if err := s.AllowUser("/data", p, "alice"); err != nil {
+		t.Fatal(err)
+	}
+	removed, err := s.RemoveAllowUser("/data", p, "alice")
+	if err != nil || !removed {
+		t.Fatalf("RemoveAllowUser failed: removed=%v err=%v", removed, err)
+	}
+	if s.Permitted("/data", p, "bob") {
+		t.Fatal("DenyAll must remain active after removing the last allowed user")
+	}
+}
@@ -14,6 +14,11 @@ type failingRevokePersister struct{}

 func (failingRevokePersister) SaveAccessRule(string, string, *access.AccessRule) error { return nil }
 func (failingRevokePersister) DeleteAccessRule(string, string) error                   { return nil }
+func (failingRevokePersister) AccessRulesLowercaseMigrated() (bool, error) { return false, nil }
+func (failingRevokePersister) SetAccessRulesLowercaseMigrated() error      { return nil }
+func (failingRevokePersister) MigrateAccessRulePathsLowercase(string, []string, access.RuleMap) error {
+	return nil
+}
 func (failingRevokePersister) SaveGroup(string, access.StringSet) error                { return nil }
 func (failingRevokePersister) DeleteGroup(string) error                                { return nil }
 func (failingRevokePersister) DeleteGroupWithRules(string, []access.RuleUpsert, []access.RuleKey) error {
@@ -6,34 +6,35 @@ import "fmt"
 type EventType string

 const (
-	EventDownload      EventType = "download"
-	EventMove          EventType = "move"
-	EventCopy          EventType = "copy"
-	EventRename        EventType = "rename"
-	EventUpload        EventType = "upload"
-	EventDelete        EventType = "delete"
-	EventBulkDelete    EventType = "bulkDelete"
-	EventArchive       EventType = "archive"
-	EventUnarchive     EventType = "unarchive"
-	EventShareCreate   EventType = "shareCreate"
-	EventShareUpdate   EventType = "shareUpdate"
-	EventShareDelete   EventType = "shareDelete"
-	EventUserCreate    EventType = "userCreate"
-	EventUserUpdate    EventType = "userUpdate"
-	EventUserDelete    EventType = "userDelete"
-	EventAccessUpdate  EventType = "accessUpdate"
-	EventAccessCreate  EventType = "accessCreate"
-	EventAccessDelete  EventType = "accessDelete"
-	EventQuotaCreate   EventType = "quotaCreate"
-	EventQuotaUpdate   EventType = "quotaUpdate"
-	EventQuotaDelete   EventType = "quotaDelete"
-	EventLogin             EventType = "login"
-	EventLogout            EventType = "logout"
-	EventSignup            EventType = "signup"
-	EventPasskeyRegister   EventType = "passkeyRegister"
-	EventPasskeyDelete     EventType = "passkeyDelete"
-	EventTokenCreate       EventType = "tokenCreate"
-	EventTokenDelete       EventType = "tokenDelete"
+	EventDownload        EventType = "download"
+	EventMove            EventType = "move"
+	EventCopy            EventType = "copy"
+	EventRename          EventType = "rename"
+	EventUpload          EventType = "upload"
+	EventFileModify      EventType = "fileModify"
+	EventDelete          EventType = "delete"
+	EventBulkDelete      EventType = "bulkDelete"
+	EventArchive         EventType = "archive"
+	EventUnarchive       EventType = "unarchive"
+	EventShareCreate     EventType = "shareCreate"
+	EventShareUpdate     EventType = "shareUpdate"
+	EventShareDelete     EventType = "shareDelete"
+	EventUserCreate      EventType = "userCreate"
+	EventUserUpdate      EventType = "userUpdate"
+	EventUserDelete      EventType = "userDelete"
+	EventAccessUpdate    EventType = "accessUpdate"
+	EventAccessCreate    EventType = "accessCreate"
+	EventAccessDelete    EventType = "accessDelete"
+	EventQuotaCreate     EventType = "quotaCreate"
+	EventQuotaUpdate     EventType = "quotaUpdate"
+	EventQuotaDelete     EventType = "quotaDelete"
+	EventLogin           EventType = "login"
+	EventLogout          EventType = "logout"
+	EventSignup          EventType = "signup"
+	EventPasskeyRegister EventType = "passkeyRegister"
+	EventPasskeyDelete   EventType = "passkeyDelete"
+	EventTokenCreate     EventType = "tokenCreate"
+	EventTokenDelete     EventType = "tokenDelete"
 	EventDuplicateFinder EventType = "duplicateFinder"
 )

@@ -44,6 +45,7 @@ var AllEventTypes = []EventType{
 	EventCopy,
 	EventRename,
 	EventUpload,
+	EventFileModify,
 	EventDelete,
 	EventBulkDelete,
 	EventArchive,
@@ -77,6 +79,7 @@ var FileEventTypes = []EventType{
 	EventCopy,
 	EventRename,
 	EventUpload,
+	EventFileModify,
 	EventDelete,
 	EventBulkDelete,
 	EventArchive,
@@ -155,7 +158,7 @@ func intersectEventTypes(requested, allowed []EventType) []EventType {
 func (e EventType) Valid() bool {
 	switch e {
 	case EventDownload, EventMove, EventCopy, EventRename,
-		EventUpload, EventDelete, EventBulkDelete,
+		EventUpload, EventFileModify, EventDelete, EventBulkDelete,
 		EventArchive, EventUnarchive,
 		EventShareCreate, EventShareUpdate, EventShareDelete,
 		EventUserCreate, EventUserUpdate, EventUserDelete, EventAccessUpdate, EventAccessCreate, EventAccessDelete,
@@ -145,15 +145,20 @@ func (s *Storage) UpdateShares(oldSource, oldPath, newSource, newPath string) (i
 		if l == nil || l.SourcePath != oldSource {
 			continue
 		}
+		shareWasDir := strings.HasSuffix(l.Path, "/")
 		l.Path = utils.AddTrailingSlashIfNotExists(l.Path)

-		pos := strings.Index(l.Path, oldPath)
-		if pos < 0 {
+		norm := utils.AddTrailingSlashIfNotExists(l.Path)
+		if !strings.HasPrefix(norm, oldPath) {
 			continue
 		}

 		l.SourcePath = newSource
-		l.Path = newPath
+		suffix := strings.TrimPrefix(norm, oldPath)
+		l.Path = strings.TrimSuffix(newPath+suffix, "/")
+		if shareWasDir {
+			l.Path = utils.AddTrailingSlashIfNotExists(l.Path)
+		}

 		if err := s.back.Save(l); err != nil {
 			logger.Error("failed to save updated share", "hash", l.Hash, "error", err)
@@ -6,11 +6,13 @@ import (
 	"time"

 	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
-	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/testutil"
 	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing/iteminfo"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 )

 func TestMain(m *testing.M) {
+	testutil.QuietLogging()
 	if fileutils.PermDir == 0 {
 		fileutils.SetFsPermissions(0o644, 0o755)
 	}
@@ -3,11 +3,32 @@ package sqldb
 import (
 	"database/sql"
 	"encoding/json"
+	"errors"
 	"fmt"

 	"github.com/gtsteffaniak/filebrowser/backend/internal/database/access"
 )

+// settingAccessRulesLowercaseMigrated marks that access rule paths were normalized to lowercase.
+const settingAccessRulesLowercaseMigrated = "access_rules_lowercase_migrated"
+
+// AccessRulesLowercaseMigrated reports whether the one-time lowercase migration has completed.
+func (s *SQLStore) AccessRulesLowercaseMigrated() (bool, error) {
+	_, err := s.GetSetting(settingAccessRulesLowercaseMigrated)
+	if err != nil {
+		if errors.Is(err, ErrSettingNotFound) {
+			return false, nil
+		}
+		return false, err
+	}
+	return true, nil
+}
+
+// SetAccessRulesLowercaseMigrated records that the lowercase migration finished (empty DBs too).
+func (s *SQLStore) SetAccessRulesLowercaseMigrated() error {
+	return s.SaveSetting(settingAccessRulesLowercaseMigrated, true)
+}
+
 // Access rules SQL operations

 // GetAccessRulesBySource retrieves all access rules for a source
@@ -121,6 +142,42 @@ func (s *SQLStore) SaveAccessRule(source, path string, rule *access.AccessRule)
 	return nil
 }

+// MigrateAccessRulePathsLowercase rewrites rule paths to lowercase in one transaction.
+func (s *SQLStore) MigrateAccessRulePathsLowercase(source string, oldPaths []string, newRules access.RuleMap) error {
+	tx, err := s.BeginTx()
+	if err != nil {
+		return fmt.Errorf("failed to begin access rule migration: %w", err)
+	}
+	rollback := func(cause error) error {
+		if rbErr := tx.Rollback(); rbErr != nil {
+			return fmt.Errorf("%w (rollback also failed: %v)", cause, rbErr)
+		}
+		return cause
+	}
+
+	for path, rule := range newRules {
+		ruleDataJSON, err := json.Marshal(rule)
+		if err != nil {
+			return rollback(fmt.Errorf("failed to marshal rule data: %w", err))
+		}
+		if _, err := tx.Exec(`INSERT OR REPLACE INTO access_rules (source, path, rule_data) VALUES (?, ?, ?)`, source, path, ruleDataJSON); err != nil {
+			return rollback(fmt.Errorf("failed to save access rule: %w", err))
+		}
+	}
+	for _, old := range oldPaths {
+		if _, kept := newRules[old]; kept {
+			continue
+		}
+		if _, err := tx.Exec(`DELETE FROM access_rules WHERE source = ? AND path = ?`, source, old); err != nil {
+			return rollback(fmt.Errorf("failed to delete access rule: %w", err))
+		}
+	}
+	if err := tx.Commit(); err != nil {
+		return fmt.Errorf("failed to commit access rule migration: %w", err)
+	}
+	return nil
+}
+
 // DeleteAccessRule deletes an access rule
 func (s *SQLStore) DeleteAccessRule(source, path string) error {
 	query := `DELETE FROM access_rules WHERE source = ? AND path = ?`
@@ -0,0 +1,43 @@
+package sqldb
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/access"
+)
+
+// The lowercase marker is set by StartupMigrateAccessRuleKeys after all
+// sources migrate, not inside the per-source migration transaction.
+func TestMigrateAccessRulePathsLowercaseRewritesPaths(t *testing.T) {
+	store, _, err := NewSQLStore(filepath.Join(t.TempDir(), "test.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { store.Close() })
+
+	rule := &access.AccessRule{
+		Allow: access.RuleSet{Users: map[string]struct{}{"bob": {}}},
+	}
+	if err = store.SaveAccessRule("src", "/Old/", rule); err != nil {
+		t.Fatal(err)
+	}
+
+	newRules := access.RuleMap{
+		"/old/": rule,
+	}
+	if err = store.MigrateAccessRulePathsLowercase("src", []string{"/Old/"}, newRules); err != nil {
+		t.Fatal(err)
+	}
+
+	rules, err := store.GetAccessRulesBySource("src")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if rules["/old/"] == nil {
+		t.Fatal("expected lowercased rule row")
+	}
+	if rules["/Old/"] != nil {
+		t.Fatal("expected old rule path to be deleted")
+	}
+}
@@ -0,0 +1,73 @@
+package users
+
+import (
+	"encoding/json"
+	"strings"
+)
+
+// GlobalPermissionsFieldMask records which global permission JSON keys were present
+// on a create-user request (admin, api, share, realtime). Omitted keys should receive
+// userDefaults; present keys keep the caller's value, including explicit false.
+type GlobalPermissionsFieldMask struct {
+	Admin    bool
+	Api      bool
+	Share    bool
+	Realtime bool
+}
+
+// Any reports whether at least one global permission key was explicitly present.
+func (m GlobalPermissionsFieldMask) Any() bool {
+	return m.Admin || m.Api || m.Share || m.Realtime
+}
+
+// GlobalPermissionsFieldMaskFromJSON builds a mask from a permissions object JSON value.
+// A nil or JSON null value yields an empty mask (no keys explicitly set).
+func GlobalPermissionsFieldMaskFromJSON(raw json.RawMessage) GlobalPermissionsFieldMask {
+	if len(raw) == 0 || string(raw) == "null" {
+		return GlobalPermissionsFieldMask{}
+	}
+	var obj map[string]json.RawMessage
+	if err := json.Unmarshal(raw, &obj); err != nil {
+		return GlobalPermissionsFieldMask{}
+	}
+	var mask GlobalPermissionsFieldMask
+	for key := range obj {
+		switch strings.ToLower(key) {
+		case "admin":
+			mask.Admin = true
+		case "api":
+			mask.Api = true
+		case "share":
+			mask.Share = true
+		case "realtime":
+			mask.Realtime = true
+		}
+	}
+	return mask
+}
+
+// MergeGlobalPermissionsOnCreate combines defaults with caller-supplied global permissions.
+// When mask is empty, any true global flag on requested preserves the full requested struct
+// (programmatic create paths). Otherwise only masked fields override defaults.
+func MergeGlobalPermissionsOnCreate(defaults, requested Permissions, mask GlobalPermissionsFieldMask) Permissions {
+	if !mask.Any() {
+		if requested.Admin || requested.Api || requested.Share || requested.Realtime {
+			return requested
+		}
+		return defaults
+	}
+	out := defaults
+	if mask.Admin {
+		out.Admin = requested.Admin
+	}
+	if mask.Api {
+		out.Api = requested.Api
+	}
+	if mask.Share {
+		out.Share = requested.Share
+	}
+	if mask.Realtime {
+		out.Realtime = requested.Realtime
+	}
+	return out
+}
@@ -0,0 +1,68 @@
+package users
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestGlobalPermissionsFieldMaskFromJSON(t *testing.T) {
+	tests := []struct {
+		name string
+		raw  string
+		want GlobalPermissionsFieldMask
+	}{
+		{name: "empty object", raw: `{}`, want: GlobalPermissionsFieldMask{}},
+		{name: "null", raw: `null`, want: GlobalPermissionsFieldMask{}},
+		{name: "admin only", raw: `{"admin":true}`, want: GlobalPermissionsFieldMask{Admin: true}},
+		{name: "partial mixed case", raw: `{"Share":false,"api":true}`, want: GlobalPermissionsFieldMask{Api: true, Share: true}},
+		{name: "explicit false still present", raw: `{"share":false}`, want: GlobalPermissionsFieldMask{Share: true}},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			got := GlobalPermissionsFieldMaskFromJSON(json.RawMessage(tc.raw))
+			if got != tc.want {
+				t.Fatalf("got %+v, want %+v", got, tc.want)
+			}
+		})
+	}
+}
+
+func TestMergeGlobalPermissionsOnCreate(t *testing.T) {
+	defaults := Permissions{Admin: false, Api: true, Share: true, Realtime: true}
+
+	t.Run("omitted permissions keep defaults", func(t *testing.T) {
+		requested := Permissions{}
+		got := MergeGlobalPermissionsOnCreate(defaults, requested, GlobalPermissionsFieldMask{})
+		if got != defaults {
+			t.Fatalf("got %+v, want defaults %+v", got, defaults)
+		}
+	})
+
+	t.Run("partial mask merges only present keys", func(t *testing.T) {
+		requested := Permissions{Admin: true, Api: false}
+		mask := GlobalPermissionsFieldMask{Admin: true, Api: true}
+		got := MergeGlobalPermissionsOnCreate(defaults, requested, mask)
+		want := Permissions{Admin: true, Api: false, Share: true, Realtime: true}
+		if got != want {
+			t.Fatalf("got %+v, want %+v", got, want)
+		}
+	})
+
+	t.Run("explicit false on masked field", func(t *testing.T) {
+		requested := Permissions{Share: false}
+		mask := GlobalPermissionsFieldMask{Share: true}
+		got := MergeGlobalPermissionsOnCreate(defaults, requested, mask)
+		want := Permissions{Admin: false, Api: true, Share: false, Realtime: true}
+		if got != want {
+			t.Fatalf("got %+v, want %+v", got, want)
+		}
+	})
+
+	t.Run("programmatic all true without mask", func(t *testing.T) {
+		requested := Permissions{Admin: true, Api: true, Share: true, Realtime: true}
+		got := MergeGlobalPermissionsOnCreate(defaults, requested, GlobalPermissionsFieldMask{})
+		if got != requested {
+			t.Fatalf("got %+v, want %+v", got, requested)
+		}
+	})
+}
@@ -1,6 +1,68 @@
 package users

-import "testing"
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestPermissionsUnmarshalJSONMarksConfigured(t *testing.T) {
+	t.Parallel()
+
+	var p Permissions
+	if err := json.Unmarshal([]byte(`{"admin":false,"share":false,"api":false,"realtime":false}`), &p); err != nil {
+		t.Fatal(err)
+	}
+	if !p.Configured {
+		t.Fatal("expected Configured after unmarshaling an explicit permissions object")
+	}
+	if p.Admin || p.Share || p.Api || p.Realtime {
+		t.Fatalf("expected all-false permissions, got %+v", p)
+	}
+
+	var u struct {
+		Permissions Permissions `json:"permissions"`
+	}
+	if err := json.Unmarshal([]byte(`{}`), &u); err != nil {
+		t.Fatal(err)
+	}
+	if u.Permissions.Configured {
+		t.Fatal("omitted permissions must not set Configured")
+	}
+
+	var nullWrap struct {
+		Permissions Permissions `json:"permissions"`
+	}
+	if err := json.Unmarshal([]byte(`{"permissions":null}`), &nullWrap); err != nil {
+		t.Fatal(err)
+	}
+	if nullWrap.Permissions.Configured {
+		t.Fatal("permissions null must not set Configured")
+	}
+	if nullWrap.Permissions.GlobalPermissionsFieldMaskFromPermissions().Any() {
+		t.Fatal("permissions null must not set global key mask")
+	}
+}
+
+func TestPermissionsUnmarshalJSONPartialKeys(t *testing.T) {
+	t.Parallel()
+
+	var u struct {
+		Permissions Permissions `json:"permissions"`
+	}
+	if err := json.Unmarshal([]byte(`{"permissions":{"admin":true}}`), &u); err != nil {
+		t.Fatal(err)
+	}
+	if !u.Permissions.Configured {
+		t.Fatal("expected Configured for explicit permissions object")
+	}
+	mask := u.Permissions.GlobalPermissionsFieldMaskFromPermissions()
+	if !mask.Admin || mask.Api || mask.Share || mask.Realtime {
+		t.Fatalf("mask = %+v, want admin only", mask)
+	}
+	if !u.Permissions.Admin {
+		t.Fatal("expected admin true")
+	}
+}

 func TestSourceFilePermissionsIsUnset(t *testing.T) {
 	t.Parallel()
@@ -24,7 +24,11 @@ func HasAnyGlobalPermission(p Permissions) bool {
 }

 // IsMinimalApiToken reports whether the token inherits the owner's globals at auth time
-// rather than embedding its own global permission caps in the JWT.
+// rather than applying stored global permission caps.
 func IsMinimalApiToken(t AuthToken) bool {
+	if t.Minimal != nil {
+		return *t.Minimal
+	}
+	// Legacy tokens lack minimal; empty stored global caps implied minimal (WebDAV-style).
 	return !HasAnyGlobalPermission(t.Permissions)
 }
@@ -45,6 +45,14 @@ func TestIsMinimalApiToken(t *testing.T) {
 		t.Fatal("custom token with global caps should not be minimal")
 	}
 	if !IsMinimalApiToken(AuthToken{Permissions: Permissions{Modify: true}}) {
-		t.Fatal("token without global caps should be minimal")
+		t.Fatal("legacy token without global caps should be minimal")
+	}
+	minimal := true
+	if !IsMinimalApiToken(AuthToken{Minimal: &minimal}) {
+		t.Fatal("explicit minimal token should be minimal")
+	}
+	customized := false
+	if IsMinimalApiToken(AuthToken{Minimal: &customized}) {
+		t.Fatal("explicit customized token with empty caps should not be minimal")
 	}
 }
@@ -1,6 +1,7 @@
 package users

 import (
+	"encoding/json"
 	"fmt"
 	"strings"

@@ -104,6 +105,8 @@ type AuthToken struct {
 	BelongsTo   uint64      `json:"belongsTo,omitempty"` // legacy stored metadata only, never trusted for auth; identity is always the hashed_tokens lookup
 	IssuedAt    int64       `json:"issuedAt,omitempty"`
 	ExpiresAt   int64       `json:"expiresAt,omitempty"`
+	// Minimal distinguishes owner-inheriting tokens from customized caps. Nil means legacy (infer from stored permissions).
+	Minimal     *bool       `json:"minimal,omitempty"`
 	Permissions Permissions `json:"Permissions,omitempty"`
 }

@@ -113,15 +116,65 @@ type MinimalAuthToken struct {
 }

 type Permissions struct {
-	Api      bool `json:"api"`                // allow api access
-	Admin    bool `json:"admin"`              // allow admin access
-	Modify   bool `json:"modify,omitempty"`   // deprecated: legacy user migration only; not used for API tokens
-	Share    bool `json:"share"`              // allow sharing files
-	Realtime bool `json:"realtime"`           // allow realtime updates
-	Delete   bool `json:"delete,omitempty"`   // deprecated: legacy user migration only; not used for API tokens
-	Create   bool `json:"create,omitempty"`   // deprecated: legacy user migration only; not used for API tokens
-	Download bool `json:"download,omitempty"` // deprecated: legacy user migration only; not used for API tokens
-	View     bool `json:"view,omitempty"`     // deprecated: legacy user migration only; not used for API tokens
+	Api        bool `json:"api"`                // allow api access
+	Admin      bool `json:"admin"`              // allow admin access
+	Modify     bool `json:"modify,omitempty"`   // deprecated: legacy user migration only; not used for API tokens
+	Share      bool `json:"share"`              // allow sharing files
+	Realtime   bool `json:"realtime"`           // allow realtime updates
+	Delete     bool `json:"delete,omitempty"`   // deprecated: legacy user migration only; not used for API tokens
+	Create     bool `json:"create,omitempty"`   // deprecated: legacy user migration only; not used for API tokens
+	Download   bool `json:"download,omitempty"` // deprecated: legacy user migration only; not used for API tokens
+	View       bool `json:"view,omitempty"`     // deprecated: legacy user migration only; not used for API tokens
+	Configured bool `json:"-"`                  // true when explicitly set on create (allows intentional deny-all); not persisted or API-visible
+
+	PresentGlobalKeys GlobalPermissionsFieldMask `json:"-"` // JSON keys present on create-user permissions object
+}
+
+// MarkPermissionsConfigured marks account permissions as explicitly set (including all-false).
+func MarkPermissionsConfigured(p Permissions) Permissions {
+	p.Configured = true
+	return p
+}
+
+// GlobalPermissionsFieldMaskFromPermissions returns keys recorded during Permissions JSON decode.
+func (p Permissions) GlobalPermissionsFieldMaskFromPermissions() GlobalPermissionsFieldMask {
+	return p.PresentGlobalKeys
+}
+
+// UnmarshalJSON sets Configured so an explicit all-false permissions object is distinct from omission.
+// JSON null and absent permissions do not set Configured.
+func (p *Permissions) UnmarshalJSON(data []byte) error {
+	trimmed := strings.TrimSpace(string(data))
+	if trimmed == "" || trimmed == "null" {
+		*p = Permissions{}
+		return nil
+	}
+	var obj map[string]json.RawMessage
+	if err := json.Unmarshal(data, &obj); err != nil {
+		return err
+	}
+	type plain Permissions
+	var tmp plain
+	if err := json.Unmarshal(data, &tmp); err != nil {
+		return err
+	}
+	*p = Permissions(tmp)
+	p.Configured = true
+	p.PresentGlobalKeys = GlobalPermissionsFieldMaskFromJSON(data)
+	return nil
+}
+
+// EffectiveGlobalPermissionsMask combines the caller-supplied field mask and the key
+// presence recorded by Permissions.UnmarshalJSON.
+func (u *User) EffectiveGlobalPermissionsMask() GlobalPermissionsFieldMask {
+	fromPerms := u.Permissions.GlobalPermissionsFieldMaskFromPermissions()
+	m := u.PermissionsFieldMask
+	return GlobalPermissionsFieldMask{
+		Admin:    m.Admin || fromPerms.Admin,
+		Api:      m.Api || fromPerms.Api,
+		Share:    m.Share || fromPerms.Share,
+		Realtime: m.Realtime || fromPerms.Realtime,
+	}
 }

 // SourceFilePermissions holds per-source file operation permissions (v4+).
@@ -206,6 +259,10 @@ type UserLegacyFields struct {
 type User struct {
 	FrontendUser
 	ID uint64 `json:"id,omitempty"`
+	// PermissionsFieldMask marks global permission keys a programmatic create caller
+	// explicitly supplied; not persisted. JSON create requests record key presence on
+	// Permissions.PresentGlobalKeys during decode instead.
+	PermissionsFieldMask GlobalPermissionsFieldMask `json:"-"`
 	// BackendScopes is the authoritative, persisted access list (SourceScope.Name = backend source path).
 	// SQLite stores this inside user_data JSON under the key "scopes" (see sqldb.UserData).
 	BackendScopes            []BackendScope                   `json:"backendScopes,omitempty"`
@@ -41,15 +41,13 @@ func handleUserEvents() {
 	for ue := range userEventChan {
 		for _, user := range ue.users {
 			userClientsMu.RLock()
-			conns := userClients[user]
-			userClientsMu.RUnlock()
-
-			for _, ch := range conns {
+			for _, ch := range userClients[user] {
 				select {
 				case ch <- ue.event:
 				default:
 				}
 			}
+			userClientsMu.RUnlock()
 		}
 	}
 }
@@ -135,28 +133,14 @@ func DebouncedBroadcast(eventType, message string) {
 func handleSourceUpdates() {
 	for update := range sourceUpdateChan {
 		sourceClientsMu.RLock()
-		clients := sourceClients[update.source]
-		clientCount := len(clients)
-		sourceClientsMu.RUnlock()
-
-		if clientCount == 0 {
-			// No clients registered for this source - this is normal if no one is connected
-			continue
-		}
-
-		sentCount := 0
-		for ch := range clients {
+		for ch := range sourceClients[update.source] {
 			select {
 			case ch <- update.event:
-				sentCount++
 			default:
 				// Channel full, message dropped
 			}
 		}
-		// Log if we have clients but couldn't send to all
-		//if sentCount < clientCount {
-		//	// Some messages were dropped due to full channels
-		//}
+		sourceClientsMu.RUnlock()
 	}
 }

@@ -0,0 +1,74 @@
+package events
+
+import (
+	"sync"
+	"testing"
+	"time"
+)
+
+func TestConcurrentRegisterUnregisterSourceUpdates(t *testing.T) {
+	stop := make(chan struct{})
+	go func() {
+		for {
+			select {
+			case <-stop:
+				return
+			default:
+				ch := Register("stress-user", []string{"stress-source"})
+				Unregister("stress-user", ch)
+			}
+		}
+	}()
+
+	for i := 0; i < 200; i++ {
+		SendSourceUpdate("stress-source", "tick")
+	}
+	close(stop)
+	time.Sleep(50 * time.Millisecond)
+}
+
+func TestConcurrentSSEClientLifecycleRace(t *testing.T) {
+	stop := make(chan struct{})
+	var wg sync.WaitGroup
+
+	for i := 0; i < 4; i++ {
+		wg.Add(1)
+		go func(id int) {
+			defer wg.Done()
+			user := "race-user-" + string(rune('a'+id))
+			source := "race-source-" + string(rune('a'+id%2))
+			for {
+				select {
+				case <-stop:
+					return
+				default:
+					ch := Register(user, []string{source, "shared-source"})
+					SendSourceUpdate(source, "tick")
+					SendSourceUpdate("shared-source", "tick")
+					SendToUsers("ping", "msg", []string{user})
+					Unregister(user, ch)
+				}
+			}
+		}(i)
+	}
+
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		for {
+			select {
+			case <-stop:
+				return
+			default:
+				SendSourceUpdate("shared-source", "broadcast")
+				SendToUsers("broadcast", "all", []string{"race-user-a", "race-user-b"})
+			}
+		}
+	}()
+
+	time.Sleep(100 * time.Millisecond)
+	close(stop)
+	wg.Wait()
+	Shutdown()
+	time.Sleep(50 * time.Millisecond)
+}
@@ -13,8 +13,8 @@ import (
 	"strings"

 	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
-	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/preview"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 	"github.com/gtsteffaniak/go-logger/logger"
 	"github.com/kovidgoyal/imaging"
 )
@@ -209,7 +209,7 @@ func generateMaskableIcon(sourceData []byte, icon iconSize) error {
 	// Android adaptive-icon content ratio (72/108 ≈ 2/3) keeps square art inside every mask shape
 	inner := icon.size * 2 / 3
 	art := imaging.Fit(img, inner, inner, imaging.Lanczos)
-	canvas := imaging.PasteCenter(imaging.New(icon.size, icon.size, maskableBackground(img)), art)
+	canvas := imaging.OverlayCenter(imaging.New(icon.size, icon.size, maskableBackground(img)), art, 1)

 	outputPath := filepath.Join(settings.PWAIconsCacheDir(), icon.name)
 	outFile, err := os.Create(outputPath)
@@ -1,13 +1,94 @@
 package icons

 import (
+	"bytes"
 	"image"
 	"image/color"
+	"image/png"
+	"os"
+	"path/filepath"
 	"testing"

 	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+	"github.com/kovidgoyal/imaging"
 )

+func TestGenerateMaskableIconKeepsCanvasOpaque(t *testing.T) {
+	originalCacheDir := settings.Config.Server.CacheDir
+	settings.Config.Server.CacheDir = t.TempDir()
+	t.Cleanup(func() { settings.Config.Server.CacheDir = originalCacheDir })
+	if err := os.MkdirAll(settings.PWAIconsCacheDir(), 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	tests := []struct {
+		name       string
+		background color.Color
+		source     func(*image.RGBA)
+	}{
+		{
+			name:       "transparent padding",
+			background: color.White,
+			source: func(img *image.RGBA) {
+				img.Set(5, 5, color.RGBA{R: 20, G: 40, B: 200, A: 255})
+			},
+		},
+		{
+			name:       "opaque edge",
+			background: color.NRGBA{R: 200, G: 100, B: 50, A: 255},
+			source: func(img *image.RGBA) {
+				for x := 0; x < 12; x++ {
+					img.Set(x, 0, color.RGBA{R: 200, G: 100, B: 50, A: 255})
+				}
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			source := image.NewRGBA(image.Rect(0, 0, 12, 12))
+			tt.source(source)
+			var sourceData bytes.Buffer
+			if err := png.Encode(&sourceData, source); err != nil {
+				t.Fatal(err)
+			}
+
+			const size = 96
+			icon := iconSize{size: size, name: "maskable.png", maskable: true}
+			if err := generateMaskableIcon(sourceData.Bytes(), icon); err != nil {
+				t.Fatal(err)
+			}
+			output, err := imaging.Open(filepath.Join(settings.PWAIconsCacheDir(), icon.name))
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if output.Bounds().Dx() != size || output.Bounds().Dy() != size {
+				t.Fatalf("got bounds %v, want %dx%d", output.Bounds(), size, size)
+			}
+			want, ok := color.NRGBAModel.Convert(tt.background).(color.NRGBA)
+			if !ok {
+				t.Fatalf("background color %#v is not NRGBA", tt.background)
+			}
+			for y := 0; y < size; y++ {
+				for x := 0; x < size; x++ {
+					outsideArt := x < 16 || x >= 80 || y < 16 || y >= 80
+					got, ok := color.NRGBAModel.Convert(output.At(x, y)).(color.NRGBA)
+					if !ok {
+						t.Fatalf("pixel (%d,%d) is not NRGBA", x, y)
+					}
+					if got.A != 255 {
+						t.Fatalf("pixel (%d,%d) has alpha %d, want opaque", x, y, got.A)
+					}
+					if outsideArt && got != want {
+						t.Fatalf("pixel (%d,%d) got %#v, want background %#v", x, y, got, want)
+					}
+				}
+			}
+		})
+	}
+}
+
 func TestMaskableBackgroundOpaqueCorner(t *testing.T) {
 	img := image.NewRGBA(image.Rect(0, 0, 12, 12))
 	img.Set(0, 0, color.RGBA{R: 10, G: 20, B: 30, A: 255})
@@ -78,12 +78,10 @@ func extractTIFFEmbeddedPreview(f *os.File) ([]byte, error) {
 		return nil, err
 	}

-	ex, err := extimagemeta.Decode(f)
-	if err != nil {
-		return nil, err
+	var candidates []previewCandidate
+	if ex, err := extimagemeta.Decode(f); err == nil {
+		candidates = previewCandidates(ex)
 	}
-
-	candidates := previewCandidates(ex)
 	if scanCandidates, scanErr := collectTIFFPreviewCandidates(f); scanErr == nil {
 		candidates = append(candidates, scanCandidates...)
 	}
@@ -115,6 +113,9 @@ func previewCandidates(ex exif.Exif) []previewCandidate {
 			out = append(out, previewCandidate{offset: ifd.ImageOffset, length: ifd.ImageLength})
 		}
 	}
+	for _, sub := range ex.SubIFDs {
+		appendIFD(sub)
+	}
 	appendIFD(ex.IFD1)
 	appendIFD(ex.IFD2)

@@ -47,15 +47,16 @@ func GetOrientation(ctx context.Context, path string) string {
 	default:
 		ex, err = extimagemeta.Decode(f)
 	}
-	if err != nil {
-		return ""
-	}
 	if ctx.Err() != nil {
 		return ""
 	}
-
-	if ex.IFD0.Orientation == 0 {
-		return ""
+	if err == nil && ex.IFD0.Orientation != 0 {
+		return tag.ValueNameFor(tag.IFD0, tag.TagOrientation, uint32(ex.IFD0.Orientation))
 	}
-	return tag.ValueNameFor(tag.IFD0, tag.TagOrientation, uint32(ex.IFD0.Orientation))
+	if !isHEICExtension(ext) {
+		if orient := extractTIFFOrientation(f); orient != 0 {
+			return tag.ValueNameFor(tag.IFD0, tag.TagOrientation, uint32(orient))
+		}
+	}
+	return ""
 }
@@ -9,11 +9,18 @@ import (
 )

 const (
+	tiffTagStripOffsets       = 0x0111
+	tiffTagOrientation        = 0x0112
+	tiffTagStripByteCounts    = 0x0117
 	tiffTagSubIFDs            = 0x014a
 	tiffTagJpgFromRaw         = 0x002e
 	tiffTagJPEGInterchange    = 0x0201
 	tiffTagJPEGInterchangeLen = 0x0202
 	tiffIFDScanLimit          = 4 * 1024 * 1024
+	tiffMagicStandard         = 42
+	tiffMagicPanasonicRW2     = 0x0055
+	tiffMagicOlympusORF1      = 0x4f52
+	tiffMagicOlympusORF2      = 0x5352
 	tiffTypeByte              = 1
 	tiffTypeASCII             = 2
 	tiffTypeShort             = 3
@@ -36,30 +43,47 @@ type tiffTag struct {
 	valueOffset uint32
 }

-// collectTIFFPreviewCandidates walks TIFF IFDs (including SubIFDs) for embedded
-// JPEG preview offset/length pairs that imagemeta does not surface.
-func collectTIFFPreviewCandidates(f *os.File) ([]previewCandidate, error) {
+// readTIFFScanWindow reads the bounded IFD scan window (up to tiffIFDScanLimit bytes) of f.
+// It validates the 8-byte TIFF header first, so non-TIFF files such as JPEGs are rejected
+// without allocating or reading the full window. ok is false for non-TIFF or too-short files.
+func readTIFFScanWindow(f *os.File) (header []byte, order binary.ByteOrder, ifd0 uint32, ok bool, err error) {
 	info, err := f.Stat()
 	if err != nil {
-		return nil, err
+		return nil, nil, 0, false, err
 	}
 	scanSize := info.Size()
 	if scanSize > tiffIFDScanLimit {
 		scanSize = tiffIFDScanLimit
 	}
 	if scanSize < 8 {
-		return nil, nil
+		return nil, nil, 0, false, nil
 	}
-	header := make([]byte, scanSize)
+	var magic [8]byte
+	if _, err = f.ReadAt(magic[:], 0); err != nil {
+		if err == io.EOF {
+			return nil, nil, 0, false, nil
+		}
+		return nil, nil, 0, false, err
+	}
+	if _, _, ok = tiffHeaderIFD0(magic[:]); !ok {
+		return nil, nil, 0, false, nil
+	}
+	header = make([]byte, scanSize)
 	n, err := f.ReadAt(header, 0)
 	if err != nil && err != io.EOF {
-		return nil, err
+		return nil, nil, 0, false, err
 	}
 	header = header[:n]
+	order, ifd0, ok = tiffHeaderIFD0(header)
+	return header, order, ifd0, ok, nil
+}

-	order, ifd0, ok := tiffHeaderIFD0(header)
-	if !ok {
-		return nil, nil
+// collectTIFFPreviewCandidates walks TIFF IFDs (including SubIFDs) for embedded
+// JPEG preview offset/length pairs that imagemeta does not surface.
+func collectTIFFPreviewCandidates(f *os.File) ([]previewCandidate, error) {
+	header, order, ifd0, ok, err := readTIFFScanWindow(f)
+	if err != nil || !ok {
+		return nil, err
 	}

 	seen := make(map[uint32]struct{})
@@ -97,6 +121,7 @@ func collectTIFFPreviewCandidates(f *os.File) ([]previewCandidate, error) {
 	for _, ifd := range ifds {
 		out = appendPreviewCandidates(out, jpgFromRawCandidates(ifd))
 		out = appendPreviewCandidates(out, jpegInterchangeCandidates(ifd))
+		out = appendPreviewCandidates(out, stripPreviewCandidates(ifd, order))
 		if len(out) >= maxTIFFPreviewCandidates {
 			break
 		}
@@ -104,6 +129,24 @@ func collectTIFFPreviewCandidates(f *os.File) ([]previewCandidate, error) {
 	return out, nil
 }

+// extractTIFFOrientation reads standard TIFF IFD0 Orientation (0x0112) as a fallback
+// when full EXIF decoding fails.
+func extractTIFFOrientation(f *os.File) uint16 {
+	header, order, ifd0, ok, err := readTIFFScanWindow(f)
+	if err != nil || !ok || ifd0 == 0 {
+		return 0
+	}
+	ifd, _, _, err := parseTIFFIFD(header, order, ifd0)
+	if err != nil {
+		return 0
+	}
+	tag, ok := ifd.tags[tiffTagOrientation]
+	if !ok || tag.count == 0 {
+		return 0
+	}
+	return tiffTagFirstUint16(tag, order)
+}
+
 func appendPreviewCandidates(dst, src []previewCandidate) []previewCandidate {
 	remaining := maxTIFFPreviewCandidates - len(dst)
 	if remaining <= 0 {
@@ -144,6 +187,48 @@ func jpegInterchangeCandidates(ifd tiffIFD) []previewCandidate {
 	return []previewCandidate{{offset: offset, length: length}}
 }

+func stripPreviewCandidates(ifd tiffIFD, order binary.ByteOrder) []previewCandidate {
+	offTag, okOff := ifd.tags[tiffTagStripOffsets]
+	lenTag, okLen := ifd.tags[tiffTagStripByteCounts]
+	if !okOff || !okLen || offTag.count != 1 || lenTag.count != 1 {
+		return nil
+	}
+	offset := tiffTagScalarUint32(offTag, order)
+	length := tiffTagScalarUint32(lenTag, order)
+	if offset == 0 || length <= 4 || length > maxPreviewReadSize {
+		return nil
+	}
+	return []previewCandidate{{offset: offset, length: length}}
+}
+
+func tiffTagScalarUint32(t tiffTag, order binary.ByteOrder) uint32 {
+	switch t.typ {
+	case tiffTypeLong, tiffTypeIFD:
+		return t.valueOffset
+	case tiffTypeShort:
+		return uint32(tiffTagFirstUint16(t, order))
+	default:
+		return 0
+	}
+}
+
+func tiffTagFirstUint16(t tiffTag, order binary.ByteOrder) uint16 {
+	switch t.typ {
+	case tiffTypeShort:
+		if order == binary.BigEndian {
+			return uint16(t.valueOffset >> 16)
+		}
+		return uint16(t.valueOffset & 0xffff)
+	case tiffTypeLong:
+		if t.valueOffset > 0xffff {
+			return 0
+		}
+		return uint16(t.valueOffset)
+	default:
+		return 0
+	}
+}
+
 func tiffHeaderIFD0(data []byte) (binary.ByteOrder, uint32, bool) {
 	if len(data) < 8 {
 		return nil, 0, false
@@ -157,7 +242,9 @@ func tiffHeaderIFD0(data []byte) (binary.ByteOrder, uint32, bool) {
 	default:
 		return nil, 0, false
 	}
-	if order.Uint16(data[2:4]) != 42 {
+	switch order.Uint16(data[2:4]) {
+	case tiffMagicStandard, tiffMagicPanasonicRW2, tiffMagicOlympusORF1, tiffMagicOlympusORF2:
+	default:
 		return nil, 0, false
 	}
 	return order, order.Uint32(data[4:8]), true
@@ -62,7 +62,7 @@ func TestCollectTIFFPreviewCandidatesIgnoresMalformedOffsets(t *testing.T) {
 func TestCollectTIFFPreviewCandidatesIgnoresMalformedSubIFDOffset(t *testing.T) {
 	data := buildSyntheticTIFF(tiffFixture{
 		thumbnailJPEG: smallJPEG,
-		subIFDJPEG:  largeJPEG,
+		subIFDJPEG:    largeJPEG,
 		badJpgFromRaw: true,
 	})
 	f := openBytesFile(t, data)
@@ -114,6 +114,138 @@ func TestTiffTagUint32sSupportsIFDType(t *testing.T) {
 	}
 }

+func TestExtractEmbeddedPreviewFallbackWhenDecodeFails(t *testing.T) {
+	// Synthetic ARW where SubIFD offset is placed after IFD2, and a SubIFD tag
+	// points past EOF so extimagemeta.Decode fails with EOF, while IFD2 holds a
+	// valid JPEGInterchangeFormat preview.
+	order := binary.LittleEndian
+	buf := make([]byte, 32*1024)
+	copy(buf[0:2], []byte("II"))
+	order.PutUint16(buf[2:4], tiffMagicStandard)
+	ifd0Off := uint32(8)
+	order.PutUint32(buf[4:8], ifd0Off)
+
+	thumbOff := uint32(4096)
+	copy(buf[thumbOff:], smallJPEG)
+	largeOff := uint32(8192)
+	copy(buf[largeOff:], largeJPEG)
+
+	ifd1Off := uint32(256)
+	ifd2Off := uint32(512)
+	subIFDOff := uint32(768)
+
+	writeIFD := func(offset uint32, entries []tiffEntry, next uint32) {
+		off := int(offset)
+		order.PutUint16(buf[off:off+2], uint16(len(entries)))
+		entryBase := off + 2
+		for i, entry := range entries {
+			pos := entryBase + i*12
+			order.PutUint16(buf[pos:pos+2], entry.tag)
+			order.PutUint16(buf[pos+2:pos+4], entry.typ)
+			order.PutUint32(buf[pos+4:pos+8], entry.count)
+			order.PutUint32(buf[pos+8:pos+12], entry.value)
+		}
+		order.PutUint32(buf[entryBase+len(entries)*12:entryBase+len(entries)*12+4], next)
+	}
+
+	writeIFD(ifd0Off, []tiffEntry{
+		{tag: tiffTagOrientation, typ: tiffTypeShort, count: 1, value: 6},
+		{tag: tiffTagSubIFDs, typ: tiffTypeLong, count: 1, value: subIFDOff},
+		{tag: tiffTagJPEGInterchange, typ: tiffTypeLong, count: 1, value: thumbOff},
+		{tag: tiffTagJPEGInterchangeLen, typ: tiffTypeLong, count: 1, value: uint32(len(smallJPEG))},
+	}, ifd1Off)
+
+	writeIFD(ifd1Off, []tiffEntry{
+		{tag: tiffTagJPEGInterchange, typ: tiffTypeLong, count: 1, value: thumbOff},
+		{tag: tiffTagJPEGInterchangeLen, typ: tiffTypeLong, count: 1, value: uint32(len(smallJPEG))},
+	}, ifd2Off)
+
+	writeIFD(ifd2Off, []tiffEntry{
+		{tag: tiffTagJPEGInterchange, typ: tiffTypeLong, count: 1, value: largeOff},
+		{tag: tiffTagJPEGInterchangeLen, typ: tiffTypeLong, count: 1, value: uint32(len(largeJPEG))},
+	}, 0)
+
+	// SubIFD has a StripOffsets tag with count=2 pointing beyond file end so Decode fails with EOF.
+	writeIFD(subIFDOff, []tiffEntry{
+		{tag: tiffTagStripOffsets, typ: tiffTypeLong, count: 2, value: uint32(len(buf) + 4096)},
+	}, 0)
+
+	path := filepath.Join(t.TempDir(), "sample.arw")
+	if err := os.WriteFile(path, buf[:int(largeOff)+len(largeJPEG)], 0o600); err != nil {
+		t.Fatal(err)
+	}
+
+	preview, err := ExtractEmbeddedPreview(t.Context(), path)
+	if err != nil {
+		t.Fatalf("ExtractEmbeddedPreview() err = %v", err)
+	}
+	if len(preview) != len(largeJPEG) {
+		t.Fatalf("ExtractEmbeddedPreview() len = %d, want %d", len(preview), len(largeJPEG))
+	}
+	if got := GetOrientation(t.Context(), path); got != "Rotate 90 CW" {
+		t.Fatalf("GetOrientation() = %q, want %q", got, "Rotate 90 CW")
+	}
+}
+
+func TestExtractEmbeddedPreviewSupportsRW2AndStripPreview(t *testing.T) {
+	order := binary.LittleEndian
+	buf := make([]byte, 16*1024)
+	copy(buf[0:2], []byte("II"))
+	order.PutUint16(buf[2:4], tiffMagicPanasonicRW2)
+	ifd0Off := uint32(8)
+	order.PutUint32(buf[4:8], ifd0Off)
+
+	largeOff := uint32(4096)
+	copy(buf[largeOff:], largeJPEG)
+
+	entries := []tiffEntry{
+		{tag: tiffTagStripOffsets, typ: tiffTypeLong, count: 1, value: largeOff},
+		{tag: tiffTagStripByteCounts, typ: tiffTypeLong, count: 1, value: uint32(len(largeJPEG))},
+	}
+	order.PutUint16(buf[ifd0Off:ifd0Off+2], uint16(len(entries)))
+	for i, entry := range entries {
+		pos := int(ifd0Off) + 2 + i*12
+		order.PutUint16(buf[pos:pos+2], entry.tag)
+		order.PutUint16(buf[pos+2:pos+4], entry.typ)
+		order.PutUint32(buf[pos+4:pos+8], entry.count)
+		order.PutUint32(buf[pos+8:pos+12], entry.value)
+	}
+
+	path := filepath.Join(t.TempDir(), "sample.rw2")
+	if err := os.WriteFile(path, buf[:int(largeOff)+len(largeJPEG)], 0o600); err != nil {
+		t.Fatal(err)
+	}
+
+	preview, err := ExtractEmbeddedPreview(t.Context(), path)
+	if err != nil {
+		t.Fatalf("ExtractEmbeddedPreview() err = %v", err)
+	}
+	if len(preview) != len(largeJPEG) {
+		t.Fatalf("ExtractEmbeddedPreview() len = %d, want %d", len(preview), len(largeJPEG))
+	}
+}
+
+func TestExtractEmbeddedPreviewDSC02672(t *testing.T) {
+	path := "/Users/steffag/Downloads/DSC02672-first-4MB.ARW"
+	if _, err := os.Stat(path); err != nil {
+		t.Skip(path)
+	}
+
+	got, err := ExtractEmbeddedPreview(t.Context(), path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !IsJPEG(got) {
+		t.Fatalf("expected JPEG preview, got %d bytes", len(got))
+	}
+	if len(got) != 2954147 {
+		t.Fatalf("preview size = %d, want 2954147", len(got))
+	}
+	if orient := GetOrientation(t.Context(), path); orient != "Horizontal (normal)" {
+		t.Fatalf("GetOrientation() = %q, want Horizontal (normal)", orient)
+	}
+}
+
 type tiffFixture struct {
 	thumbnailJPEG   []byte
 	subIFDJPEG      []byte
@@ -195,8 +327,8 @@ func buildSyntheticTIFF(fix tiffFixture) []byte {
 }

 type tiffEntry struct {
-	tag, typ       uint16
-	count, value   uint32
+	tag, typ     uint16
+	count, value uint32
 }

 func buildChainedTIFF(chainLen int) []byte {
@@ -218,3 +350,22 @@ func buildChainedTIFF(chainLen int) []byte {
 	}
 	return buf
 }
+
+// Non-TIFF files (e.g. a JPEG reaching the orientation fallback) must be rejected from the
+// 8-byte header, not after reading the whole scan window.
+func TestReadTIFFScanWindowRejectsNonTIFFFromHeader(t *testing.T) {
+	jpeg := append([]byte{0xff, 0xd8, 0xff, 0xe0}, make([]byte, 1<<20)...)
+	header, _, _, ok, err := readTIFFScanWindow(openBytesFile(t, jpeg))
+	if err != nil || ok || header != nil {
+		t.Fatalf("got header=%d bytes ok=%v err=%v, want nil/false/nil", len(header), ok, err)
+	}
+	if got := extractTIFFOrientation(openBytesFile(t, jpeg)); got != 0 {
+		t.Fatalf("orientation = %d, want 0", got)
+	}
+
+	tiff := buildSyntheticTIFF(tiffFixture{thumbnailJPEG: smallJPEG})
+	header, _, ifd0, ok, err := readTIFFScanWindow(openBytesFile(t, tiff))
+	if err != nil || !ok || ifd0 == 0 || len(header) != len(tiff) {
+		t.Fatalf("tiff: header=%d ok=%v ifd0=%d err=%v", len(header), ok, ifd0, err)
+	}
+}
@@ -76,6 +76,18 @@ func (x Format) toImaging() imaging.Format {
 	}
 }

+// encodable reports whether imaging can encode this format.
+// imaging only encodes JPEG, PNG, GIF, TIFF and BMP; webp and the netpbm
+// formats are decode-only, so previews for them must be written as JPEG.
+func (x Format) encodable() bool {
+	switch x {
+	case FormatJpeg, FormatPng, FormatGif, FormatTiff, FormatBmp:
+		return true
+	default:
+		return false
+	}
+}
+
 /*
 ENUM(
 high
@@ -203,7 +215,9 @@ func (s *Service) resizeWithSize(in io.Reader, out io.Writer, fileSize int64, op
 	var wrappedReader = in
 	var err error

-	if opts.Format == FormatHeic {
+	// HEIC has no encoder and webp/netpbm are decode-only in imaging; fall back
+	// to JPEG so preview generation does not fail with ErrUnsupportedFormat.
+	if !opts.Format.encodable() {
 		opts.Format = FormatJpeg
 	}
 	// Ensure JPEG quality is set based on quality setting
@@ -13,6 +13,7 @@ import (
 	"testing"

 	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/testutil"
 	"github.com/spf13/afero"
 	"github.com/stretchr/testify/require"
 	"golang.org/x/image/bmp"
@@ -20,6 +21,7 @@ import (
 )

 func TestMain(m *testing.M) {
+	testutil.QuietLogging()
 	// Ensure fileutils permissions are set (needed by NewPreviewGenerator)
 	if fileutils.PermDir == 0 {
 		fileutils.SetFsPermissions(0644, 0755)
@@ -159,6 +161,14 @@ func TestService_Resize(t *testing.T) {
 			},
 			matcher: sizeMatcher(100, 100),
 		},
+		"resize webp falls back to jpeg": {
+			options: ResizeOptions{Width: 100, Height: 100, ResizeMode: ResizeModeFill, Format: FormatWebp},
+			source: func(t *testing.T) afero.File {
+				t.Helper()
+				return openFile(t, "testdata/gray-sample.webp")
+			},
+			matcher: formatMatcher(FormatJpeg),
+		},
 		"resize with high quality": {
 			options: ResizeOptions{Width: 100, Height: 100, ResizeMode: ResizeModeFill, Quality: QualityHigh},
 			source: func(t *testing.T) afero.File {
@@ -272,15 +272,6 @@ func (s *Service) generateRawPreview(ctx context.Context, file iteminfo.Extended
 	case previewTypeImage:
 		ext := strings.ToLower(filepath.Ext(file.Name))
 		if iteminfo.IsRawImage(ext) {
-			if s.ffmpegService != nil {
-				previewBytes, err := s.convertImageWithFFmpeg(ctx, file.RealPath, previewSize)
-				if err == nil && len(previewBytes) >= minPreviewSize {
-					return previewBytes, nil
-				}
-				if ctx.Err() != nil {
-					return nil, ctx.Err()
-				}
-			}
 			return nil, ErrUnsupportedFormat
 		}
 		return s.generateImagePreview(ctx, file, previewSize)
@@ -21,6 +21,8 @@ type UploadContext struct {
 	SessionID       string
 	TotalSize       int64
 	HasKnownSize    bool
+	PriorFileSize   int64
+	HasPriorFileSize bool
 }

 // CheckUploadLength verifies size is known when quotas apply.
@@ -90,7 +92,9 @@ func uploadCommitDelta(ctx UploadContext) int64 {
 		return 0
 	}
 	oldSize := int64(0)
-	if ctx.DestRealPath != "" {
+	if ctx.HasPriorFileSize {
+		oldSize = ctx.PriorFileSize
+	} else if ctx.DestRealPath != "" {
 		if stat, err := os.Stat(ctx.DestRealPath); err == nil && !stat.IsDir() {
 			oldSize = stat.Size()
 		}
@@ -1,49 +1,27 @@
 package quota

-import (
-	"os"
-	"path/filepath"
-	"testing"
+import "testing"

-	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
-)
-
-func TestUploadCommitDelta_shrinkReturnsNegative(t *testing.T) {
-	dir := t.TempDir()
-	dest := filepath.Join(dir, "file.bin")
-	if err := os.WriteFile(dest, make([]byte, 100), 0644); err != nil {
-		t.Fatal(err)
-	}
+func TestUploadCommitDeltaTreatsMissingDestAsZeroPrior(t *testing.T) {
 	ctx := UploadContext{
-		Principal:    &users.User{},
-		DestRealPath: dest,
-		TotalSize:    50,
-		HasKnownSize: true,
+		TotalSize:        50,
+		HasKnownSize:     true,
+		HasPriorFileSize: true,
+		PriorFileSize:    0,
 	}
-	if got := UploadCommitDelta(ctx); got != -50 {
-		t.Fatalf("UploadCommitDelta shrink: got %d want -50", got)
-	}
-	if got := uploadReserveDelta(ctx); got != 0 {
-		t.Fatalf("uploadReserveDelta shrink: got %d want 0", got)
+	if delta := uploadCommitDelta(ctx); delta != 50 {
+		t.Fatalf("delta = %d, want 50", delta)
 	}
 }

-func TestUploadCommitDelta_growthPositive(t *testing.T) {
-	dir := t.TempDir()
-	dest := filepath.Join(dir, "file.bin")
-	if err := os.WriteFile(dest, make([]byte, 40), 0644); err != nil {
-		t.Fatal(err)
-	}
+func TestUploadCommitDeltaUsesPriorFileSize(t *testing.T) {
 	ctx := UploadContext{
-		Principal:    &users.User{},
-		DestRealPath: dest,
-		TotalSize:    100,
-		HasKnownSize: true,
+		TotalSize:        100,
+		HasKnownSize:     true,
+		HasPriorFileSize: true,
+		PriorFileSize:    40,
 	}
-	if got := UploadCommitDelta(ctx); got != 60 {
-		t.Fatalf("UploadCommitDelta growth: got %d want 60", got)
-	}
-	if got := uploadReserveDelta(ctx); got != 60 {
-		t.Fatalf("uploadReserveDelta growth: got %d want 60", got)
+	if delta := uploadCommitDelta(ctx); delta != 60 {
+		t.Fatalf("delta = %d, want 60", delta)
 	}
 }
@@ -535,6 +535,12 @@ func ApplicableFolderQuotas(sourcePath, destIndexPath string, principalUserID ui
 	return out
 }

+type reserveApplyPlan struct {
+	chk          QuotaReserveCheck
+	existingIdx  int
+	counterDelta int64
+}
+
 // ReserveQuota increases reserved bytes for applicable quotas.
 func ReserveQuota(sessionID string, checks []QuotaReserveCheck) error {
 	if sessionID == "" || len(checks) == 0 {
@@ -543,19 +549,57 @@ func ReserveQuota(sessionID string, checks []QuotaReserveCheck) error {
 	quotasMux.Lock()
 	defer quotasMux.Unlock()

+	plans := make([]reserveApplyPlan, 0, len(checks))
 	for _, chk := range checks {
 		if chk.LimitBytes <= 0 || chk.DeltaBytes <= 0 {
 			continue
 		}
-		reserved := sumSessionReservedLocked(chk.QuotaID)
-		if chk.UsedBytes+reserved+chk.DeltaBytes > chk.LimitBytes {
+		existingIdx := -1
+		var existingBytes int64
+		for i, r := range reservationsBySession[sessionID] {
+			if r.QuotaID == chk.QuotaID {
+				existingIdx = i
+				existingBytes = r.Bytes
+				break
+			}
+		}
+		if existingIdx >= 0 && existingBytes == chk.DeltaBytes {
+			continue
+		}
+		reservedOther := sumSessionReservedLocked(chk.QuotaID)
+		if existingIdx >= 0 {
+			reservedOther -= existingBytes
+		}
+		if chk.UsedBytes+reservedOther+chk.DeltaBytes > chk.LimitBytes {
 			return fmt.Errorf("quota exceeded for %s", chk.QuotaID)
 		}
+		counterDelta := chk.DeltaBytes
+		if existingIdx >= 0 {
+			counterDelta = chk.DeltaBytes - existingBytes
+		}
+		plans = append(plans, reserveApplyPlan{
+			chk:          chk,
+			existingIdx:  existingIdx,
+			counterDelta: counterDelta,
+		})
+	}
+
+	for _, plan := range plans {
+		chk := plan.chk
 		if chk.Meter == quota.MeterAccounted || chk.Kind == "share" {
 			if err := ensureQuotaCounterMemLocked(chk.QuotaID); err != nil {
 				return err
 			}
-			quotaCounters[chk.QuotaID].ReservedBytes += chk.DeltaBytes
+		}
+	}
+	for _, plan := range plans {
+		chk := plan.chk
+		if chk.Meter == quota.MeterAccounted || chk.Kind == "share" {
+			quotaCounters[chk.QuotaID].ReservedBytes += plan.counterDelta
+		}
+		if plan.existingIdx >= 0 {
+			reservationsBySession[sessionID][plan.existingIdx].Bytes = chk.DeltaBytes
+			continue
 		}
 		reservationsBySession[sessionID] = append(reservationsBySession[sessionID], quotaReservation{
 			QuotaID: chk.QuotaID,
@@ -671,6 +715,98 @@ func ForceCommitSessionQuota(sessionID string, deltaBytes int64) error {
 	return nil
 }

+// DeleteAdjustments holds accounted quota updates to apply after a successful delete.
+type DeleteAdjustments struct {
+	Deltas map[string]int64
+	Resets []string
+}
+
+// PrepareAccountedDelete captures quota adjustments while deleted paths are still indexed.
+// Folder quotas rooted inside a deleted directory are reset; covering quotas use itemBytes.
+func PrepareAccountedDelete(principal *users.User, sourceName, sourcePath, indexPath, shareHash string, isDir bool, itemBytes int64) DeleteAdjustments {
+	adj := DeleteAdjustments{Deltas: make(map[string]int64)}
+	if principal == nil {
+		return adj
+	}
+	indexPath = normalizeQuotaPath(indexPath)
+	for _, fq := range ListFolderQuotasForSource(sourcePath) {
+		if fq.LimitBytes <= 0 || (fq.UserID != 0 && fq.UserID != principal.ID) {
+			continue
+		}
+		if isDir && indexPathCovers(indexPath, fq.Path) {
+			if quota.EffectiveMeter(configuredFolderMeter(fq), sourceName, fq.Path) != quota.MeterAccounted {
+				continue
+			}
+			adj.Resets = append(adj.Resets, fq.ID)
+			continue
+		}
+		if !indexPathCovers(fq.Path, indexPath) {
+			continue
+		}
+		if quota.EffectiveMeter(configuredFolderMeter(fq), sourceName, fq.Path) != quota.MeterAccounted {
+			continue
+		}
+		if itemBytes > 0 {
+			adj.Deltas[fq.ID] = -itemBytes
+		}
+	}
+	if itemBytes > 0 {
+		for _, id := range accountedScopeQuotaIDs(principal, sourceName, sourcePath) {
+			adj.Deltas[id] = -itemBytes
+		}
+		if shareHash != "" {
+			adj.Deltas[quota.ShareQuotaID(shareHash)] = -itemBytes
+		}
+	}
+	return adj
+}
+
+// ApplyAccountedDelete applies prepared adjustments only after a successful deletion.
+func ApplyAccountedDelete(adj DeleteAdjustments) error {
+	quotasMux.Lock()
+	defer quotasMux.Unlock()
+	defer signalQuotaFlush()
+	for id, delta := range adj.Deltas {
+		if err := applyCounterDeltaLocked(id, delta); err != nil {
+			return err
+		}
+	}
+	for _, id := range adj.Resets {
+		if err := resetAccountedUsageLocked(id); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func resetAccountedUsageLocked(quotaID string) error {
+	if err := ensureQuotaCounterMemLocked(quotaID); err != nil {
+		return err
+	}
+	c := quotaCounters[quotaID]
+	c.UsedBytes = 0
+	c.Dirty = true
+	markQuotaCounterDirty(quotaID)
+	return nil
+}
+
+func accountedScopeQuotaIDs(principal *users.User, sourceName, sourcePath string) []string {
+	var ids []string
+	for _, bs := range principal.BackendScopes {
+		if bs.Path != sourcePath || bs.Quota == nil || bs.Quota.LimitBytes <= 0 {
+			continue
+		}
+		configured := bs.Quota.Meter
+		if configured == "" {
+			configured = quota.MeterIndexScope
+		}
+		if quota.EffectiveMeter(configured, sourceName, scopeIndexPath(principal, sourceName)) == quota.MeterAccounted {
+			ids = append(ids, bs.Quota.ID)
+		}
+	}
+	return ids
+}
+
 // ApplyAccountedUsageDelta adjusts accounted and share quota counters for a path (negative delta frees space).
 func ApplyAccountedUsageDelta(principal *users.User, sourceName, sourcePath, indexPath, shareHash string, delta int64) error {
 	if delta == 0 || principal == nil {
@@ -691,21 +827,8 @@ func ApplyAccountedUsageDelta(principal *users.User, sourceName, sourcePath, ind
 		}
 	}

-	for _, bs := range principal.BackendScopes {
-		if bs.Path != sourcePath || bs.Quota == nil || bs.Quota.LimitBytes <= 0 {
-			continue
-		}
-		sq := bs.Quota
-		configured := sq.Meter
-		if configured == "" {
-			configured = quota.MeterIndexScope
-		}
-		scopePath := scopeIndexPath(principal, sourceName)
-		effective := quota.EffectiveMeter(configured, sourceName, scopePath)
-		if effective != quota.MeterAccounted {
-			continue
-		}
-		if err := applyCounterDeltaLocked(sq.ID, delta); err != nil {
+	for _, id := range accountedScopeQuotaIDs(principal, sourceName, sourcePath) {
+		if err := applyCounterDeltaLocked(id, delta); err != nil {
 			return err
 		}
 	}
@@ -0,0 +1,135 @@
+package state
+
+import (
+	"reflect"
+	"slices"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/quota"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing"
+)
+
+func TestPrepareAccountedDelete(t *testing.T) {
+	oldFolders, oldSources, oldCounters := folderQuotasByID, folderQuotasBySource, quotaCounters
+	folderQuotasByID = make(map[string]*quota.FolderQuota)
+	folderQuotasBySource = make(map[string][]string)
+	quotaCounters = make(map[string]*quotaCounterMem)
+	t.Cleanup(func() {
+		folderQuotasByID, folderQuotasBySource, quotaCounters = oldFolders, oldSources, oldCounters
+		indexing.ClearTestIndices()
+	})
+	indexing.SetTestIndex("delete", "/source")
+	idx := indexing.GetIndex("delete")
+	idx.SetFolderSize("/public/", 60)
+	idx.SetFolderSize("/public/nested/", 50)
+	idx.SetFolderSize("/public/nested/deeper/", 30)
+	principal := &users.User{ID: 1, BackendScopes: []users.BackendScope{{Path: "/source", Scope: "/", Quota: &users.ScopeQuota{ID: "scope", LimitBytes: 1000, Meter: quota.MeterAccounted}}}}
+	for _, q := range []quota.FolderQuota{
+		{ID: "cover", Source: "/source", Path: "/", Meter: quota.MeterAccounted},
+		{ID: "exact", Source: "/source", Path: "/public", Meter: quota.MeterAccounted},
+		{ID: "nested", Source: "/source", Path: "/public/nested", Meter: quota.MeterAccounted, UserID: 1},
+		{ID: "deeper", Source: "/source", Path: "/public/nested/deeper", Meter: quota.MeterAccounted},
+		{ID: "missing", Source: "/source", Path: "/public/missing", Meter: quota.MeterAccounted},
+		{ID: "sibling", Source: "/source", Path: "/sibling", Meter: quota.MeterAccounted},
+		{ID: "prefix", Source: "/source", Path: "/public-other", Meter: quota.MeterAccounted},
+		{ID: "other-user", Source: "/source", Path: "/public/nested", Meter: quota.MeterAccounted, UserID: 2},
+		{ID: "other-source", Source: "/other", Path: "/public/nested", Meter: quota.MeterAccounted},
+		{ID: "index", Source: "/source", Path: "/public/nested", Meter: quota.MeterIndexSize},
+	} {
+		q.LimitBytes = 1000
+		storeFolderQuota(q)
+		quotaCounters[q.ID] = &quotaCounterMem{UsedBytes: 100, ReservedBytes: 7}
+	}
+	shareID := quota.ShareQuotaID("share")
+	quotaCounters["scope"] = &quotaCounterMem{UsedBytes: 100, ReservedBytes: 7}
+	quotaCounters[shareID] = &quotaCounterMem{UsedBytes: 100, ReservedBytes: 7}
+	wantDeltas := map[string]int64{"cover": -60, "scope": -60, shareID: -60}
+	wantResets := []string{"exact", "nested", "deeper", "missing"}
+	got := PrepareAccountedDelete(principal, "delete", "/source", "/public", "share", true, 60)
+	if !reflect.DeepEqual(got.Deltas, wantDeltas) {
+		t.Fatalf("deltas = %v, want %v", got.Deltas, wantDeltas)
+	}
+	if !slicesEqual(got.Resets, wantResets) {
+		t.Fatalf("resets = %v, want %v", got.Resets, wantResets)
+	}
+	for id, delta := range wantDeltas {
+		quotaCounters[id].UsedBytes = -delta
+	}
+	quotaCounters["cover"].UsedBytes += 40
+	for _, id := range wantResets {
+		quotaCounters[id].UsedBytes = 100
+	}
+	if err := ApplyAccountedDelete(got); err != nil {
+		t.Fatal(err)
+	}
+	for id, c := range quotaCounters {
+		expected := int64(100)
+		if _, ok := wantDeltas[id]; ok {
+			expected = 0
+		}
+		if slices.Contains(wantResets, id) {
+			expected = 0
+		}
+		if id == "cover" {
+			expected = 40
+		}
+		if c.UsedBytes != expected || c.ReservedBytes != 7 {
+			t.Errorf("%s: used=%d reserved=%d, want %d/7", id, c.UsedBytes, c.ReservedBytes, expected)
+		}
+	}
+	for _, size := range []int64{0, -1} {
+		got = PrepareAccountedDelete(principal, "delete", "/source", "/public", "", true, size)
+		wantResetsUnknown := []string{"exact", "nested", "deeper", "missing"}
+		if len(got.Deltas) != 0 || !slicesEqual(got.Resets, wantResetsUnknown) {
+			t.Fatalf("unavailable/zero ancestor: deltas=%v resets=%v", got.Deltas, got.Resets)
+		}
+	}
+	got = PrepareAccountedDelete(principal, "delete", "/source", "/public/nested/file", "", false, 5)
+	if !reflect.DeepEqual(got, DeleteAdjustments{
+		Deltas: map[string]int64{"cover": -5, "exact": -5, "nested": -5, "scope": -5},
+	}) {
+		t.Fatalf("file adjustments: %v", got)
+	}
+	empty := PrepareAccountedDelete(nil, "delete", "/source", "/public", "share", true, 60)
+	if len(empty.Deltas) != 0 || len(empty.Resets) != 0 {
+		t.Fatalf("nil principal: %v", empty)
+	}
+}
+
+func TestPrepareAccountedDeleteResetsWithoutIndexedSizes(t *testing.T) {
+	oldFolders, oldSources, oldCounters := folderQuotasByID, folderQuotasBySource, quotaCounters
+	folderQuotasByID = make(map[string]*quota.FolderQuota)
+	folderQuotasBySource = make(map[string][]string)
+	quotaCounters = make(map[string]*quotaCounterMem)
+	t.Cleanup(func() {
+		folderQuotasByID, folderQuotasBySource, quotaCounters = oldFolders, oldSources, oldCounters
+		indexing.ClearTestIndices()
+	})
+	indexing.SetTestIndex("delete", "/source")
+	principal := &users.User{ID: 1}
+	nested := quota.FolderQuota{ID: "nested", Source: "/source", Path: "/public/nested", Meter: quota.MeterAccounted, LimitBytes: 1000}
+	storeFolderQuota(nested)
+	quotaCounters["nested"] = &quotaCounterMem{UsedBytes: 50, ReservedBytes: 3}
+	got := PrepareAccountedDelete(principal, "delete", "/source", "/public", "", true, 0)
+	if !slicesEqual(got.Resets, []string{"nested"}) {
+		t.Fatalf("resets = %v, want nested reset without index sizes", got.Resets)
+	}
+	if err := ApplyAccountedDelete(got); err != nil {
+		t.Fatal(err)
+	}
+	if used, reserved := GetQuotaCounterSnapshot("nested"); used != 0 || reserved != 3 {
+		t.Fatalf("nested used=%d reserved=%d, want 0/3", used, reserved)
+	}
+}
+
+func slicesEqual(a, b []string) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	ac := slices.Clone(a)
+	bc := slices.Clone(b)
+	slices.Sort(ac)
+	slices.Sort(bc)
+	return slices.Equal(ac, bc)
+}
@@ -0,0 +1,126 @@
+package state
+
+import (
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/quota"
+)
+
+func withCleanQuotaReservations(t *testing.T) {
+	oldReservations := reservationsBySession
+	oldCounters := quotaCounters
+	initQuotaMaps()
+	t.Cleanup(func() {
+		quotasMux.Lock()
+		reservationsBySession = oldReservations
+		quotaCounters = oldCounters
+		quotasMux.Unlock()
+	})
+}
+
+func TestReserveQuota_idempotentReplaceUsesNewTotalNotIncrementTwice(t *testing.T) {
+	withCleanQuotaReservations(t)
+
+	const quotaID = "folder-q1"
+	check := func(delta int64) QuotaReserveCheck {
+		return QuotaReserveCheck{
+			QuotaID:    quotaID,
+			LimitBytes: 100,
+			UsedBytes:  0,
+			DeltaBytes: delta,
+		}
+	}
+
+	if err := ReserveQuota("upload-session", []QuotaReserveCheck{check(40)}); err != nil {
+		t.Fatalf("initial reserve: %v", err)
+	}
+	if got := SessionReservedForQuota(quotaID); got != 40 {
+		t.Fatalf("after 40: reserved=%d", got)
+	}
+
+	if err := ReserveQuota("upload-session", []QuotaReserveCheck{check(70)}); err != nil {
+		t.Fatalf("replace with 70: %v", err)
+	}
+	if got := SessionReservedForQuota(quotaID); got != 70 {
+		t.Fatalf("after 70: reserved=%d want 70", got)
+	}
+
+	if err := ReserveQuota("upload-session", []QuotaReserveCheck{check(101)}); err == nil {
+		t.Fatal("expected quota exceeded when replacing with 101")
+	}
+	if got := SessionReservedForQuota(quotaID); got != 70 {
+		t.Fatalf("after failed 101: reserved=%d want 70 unchanged", got)
+	}
+
+	if err := ReserveQuota("upload-session", []QuotaReserveCheck{check(100)}); err != nil {
+		t.Fatalf("replace with 100 at limit: %v", err)
+	}
+	if got := SessionReservedForQuota(quotaID); got != 100 {
+		t.Fatalf("after 100: reserved=%d", got)
+	}
+}
+
+func TestReserveQuota_multiCheckAtomicOnFailure(t *testing.T) {
+	withCleanQuotaReservations(t)
+
+	ok := QuotaReserveCheck{QuotaID: "q-ok", LimitBytes: 1000, UsedBytes: 0, DeltaBytes: 200}
+	if err := ReserveQuota("sess", []QuotaReserveCheck{ok}); err != nil {
+		t.Fatalf("setup reserve: %v", err)
+	}
+	if got := SessionReservedForQuota("q-ok"); got != 200 {
+		t.Fatalf("setup reserved=%d", got)
+	}
+
+	tight := QuotaReserveCheck{QuotaID: "q-tight", LimitBytes: 50, UsedBytes: 0, DeltaBytes: 60}
+	batch := []QuotaReserveCheck{
+		{QuotaID: "q-ok", LimitBytes: 1000, UsedBytes: 0, DeltaBytes: 500},
+		tight,
+	}
+	if err := ReserveQuota("sess", batch); err == nil {
+		t.Fatal("expected second quota in batch to fail")
+	}
+	if got := SessionReservedForQuota("q-ok"); got != 200 {
+		t.Fatalf("first quota must be unchanged after failed batch, reserved=%d", got)
+	}
+	if got := SessionReservedForQuota("q-tight"); got != 0 {
+		t.Fatalf("failed quota must not be reserved, got=%d", got)
+	}
+}
+
+// Accounted meters run counter ensure before any reservation mutation; a failed batch must
+// leave session reservations unchanged (two-pass ReserveQuota).
+func TestReserveQuota_accountedBatchAtomicOnFailure(t *testing.T) {
+	withCleanQuotaReservations(t)
+	if sqlDb == nil {
+		t.Skip("requires initialized SQL store for accounted quota counters")
+	}
+
+	first := QuotaReserveCheck{
+		QuotaID:    "q-accounted-a",
+		Kind:       "share",
+		Meter:      quota.MeterAccounted,
+		LimitBytes: 1000,
+		UsedBytes:  0,
+		DeltaBytes: 100,
+	}
+	if err := ReserveQuota("sess-acct", []QuotaReserveCheck{first}); err != nil {
+		t.Fatalf("setup reserve: %v", err)
+	}
+	if got := SessionReservedForQuota("q-accounted-a"); got != 100 {
+		t.Fatalf("setup reserved=%d", got)
+	}
+
+	batch := []QuotaReserveCheck{
+		{QuotaID: "q-accounted-a", Kind: "share", Meter: quota.MeterAccounted, LimitBytes: 1000, UsedBytes: 0, DeltaBytes: 500},
+		{QuotaID: "q-accounted-b", Kind: "share", Meter: quota.MeterAccounted, LimitBytes: 50, UsedBytes: 0, DeltaBytes: 60},
+	}
+	if err := ReserveQuota("sess-acct", batch); err == nil {
+		t.Fatal("expected second accounted quota in batch to fail")
+	}
+	if got := SessionReservedForQuota("q-accounted-a"); got != 100 {
+		t.Fatalf("first accounted reservation must be unchanged after failed batch, reserved=%d", got)
+	}
+	if got := SessionReservedForQuota("q-accounted-b"); got != 0 {
+		t.Fatalf("failed accounted quota must not be reserved, got=%d", got)
+	}
+}
@@ -348,14 +348,19 @@ func UpdateSharesForMovedResource(oldSource, oldPath, newSource, newPath string)
 			continue
 		}
 		norm := utils.AddTrailingSlashIfNotExists(l.Path)
-		if !strings.Contains(norm, oldPath) {
+		if !strings.HasPrefix(norm, oldPath) {
 			continue
 		}

 		removeShareFromPathIndexLocked(l.SourcePath, l.Path, l.Hash)

+		shareWasDir := strings.HasSuffix(l.Path, "/")
 		l.SourcePath = newSource
-		l.Path = newPath
+		suffix := strings.TrimPrefix(norm, oldPath)
+		l.Path = strings.TrimSuffix(newPath+suffix, "/")
+		if shareWasDir {
+			l.Path = utils.AddTrailingSlashIfNotExists(l.Path)
+		}

 		if err := sqlDb.SaveShare(l); err != nil {
 			logger.Error("failed to save updated share after resource move", "hash", l.Hash, "error", err)
@@ -0,0 +1,35 @@
+package state
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+)
+
+func rewriteSharePathAfterMove(sharePath, oldPath, newPath string) string {
+	oldPath = utils.AddTrailingSlashIfNotExists(oldPath)
+	newPath = utils.AddTrailingSlashIfNotExists(newPath)
+	norm := utils.AddTrailingSlashIfNotExists(sharePath)
+	if !strings.HasPrefix(norm, oldPath) {
+		return sharePath
+	}
+	suffix := strings.TrimPrefix(norm, oldPath)
+	shareWasDir := strings.HasSuffix(sharePath, "/")
+	updated := strings.TrimSuffix(newPath+suffix, "/")
+	if shareWasDir {
+		updated = utils.AddTrailingSlashIfNotExists(updated)
+	}
+	return updated
+}
+
+func TestRewriteSharePathAfterMove(t *testing.T) {
+	got := rewriteSharePathAfterMove("/photos/2024/one.jpg", "/photos/", "/archive/photos/")
+	want := "/archive/photos/2024/one.jpg"
+	if got != want {
+		t.Fatalf("got %q want %q", got, want)
+	}
+	if rewriteSharePathAfterMove("/backup/photos/", "/photos/", "/archive/photos/") != "/backup/photos/" {
+		t.Fatal("substring match must not retarget unrelated share")
+	}
+}
@@ -169,6 +169,16 @@ func initialize(dbPath string) (bool, error) {

 	newAccessDb.SetSQLStore(sqlDb)

+	accessRulesLowercased, err := sqlDb.AccessRulesLowercaseMigrated()
+	if err != nil {
+		return existingDb, fmt.Errorf("failed to read access rules migration marker: %w", err)
+	}
+	if !accessRulesLowercased {
+		if migErr := newAccessDb.StartupMigrateAccessRuleKeys(); migErr != nil {
+			return existingDb, fmt.Errorf("failed to migrate access rule paths: %w", migErr)
+		}
+	}
+
 	usersMux.Lock()
 	sharesMux.Lock()
 	indexMux.Lock()
@@ -273,6 +273,23 @@ func EffectiveUserDefaults() settings.UserDefaults {
 	return userDefaultsDefault
 }

+// SetEffectiveUserDefaultsForTest replaces in-memory universal defaults (tests only).
+func SetEffectiveUserDefaultsForTest(t interface {
+	Helper()
+	Cleanup(func())
+}, d settings.UserDefaults) {
+	t.Helper()
+	userDefaultsMu.Lock()
+	previous := userDefaultsDefault
+	userDefaultsDefault = d
+	userDefaultsMu.Unlock()
+	t.Cleanup(func() {
+		userDefaultsMu.Lock()
+		userDefaultsDefault = previous
+		userDefaultsMu.Unlock()
+	})
+}
+
 // ApplyUserDefaults applies persisted defaults to a user, including sidebar link and tool access defaults.
 func ApplyUserDefaults(u *users.User) {
 	applyUserSettingsDefaults(u)
@@ -19,6 +19,25 @@ import (

 // User operations

+// backendScopeKey identifies a scope by its full identity for permission restore: scopes
+// may share a source path while carrying different permissions per sub-scope.
+type backendScopeKey struct {
+	path  string
+	scope string
+}
+
+// backendScopeKeyFor normalizes an empty scope the same way MergeDefaultEnabledBackendScopes
+// does (source defaultUserScope) so snapshot keys still match after defaults are applied.
+func backendScopeKeyFor(scope users.BackendScope) backendScopeKey {
+	s := scope.Scope
+	if s == "" {
+		if src, ok := settings.Config.Server.SourceMap[scope.Path]; ok && src != nil {
+			s = src.Config.DefaultUserScope
+		}
+	}
+	return backendScopeKey{path: scope.Path, scope: s}
+}
+
 // copyBackendSourcePermissions returns a shallow copy of the per-source permissions map.
 func copyBackendSourcePermissions(m map[string]users.SourceFilePermissions) map[string]users.SourceFilePermissions {
 	if m == nil {
@@ -203,23 +222,68 @@ func CreateUser(user *users.User, plaintextPassword string) error {
 		user.Password = hashedPassword
 	}

+	// Merge global permissions before converting API scopes: the final Admin value
+	// (including account defaults when the request omits admin) decides which source
+	// permissions applyScopesFromAPI assigns to scopes that omit permissions.
+	preserveRequirePasswordChange := user.RequirePasswordChange
+	requestedPermissions := user.Permissions
+	globalMask := user.EffectiveGlobalPermissionsMask()
+	// Configured distinguishes an explicit all-false permissions object from omission
+	// (zero value). Any set bit still counts so Go callers that set Admin without
+	// MarkPermissionsConfigured (e.g. OIDC admin promotion) keep working.
+	permissionsRequested := globalMask.Any() || requestedPermissions.Configured ||
+		requestedPermissions.Admin || requestedPermissions.Share ||
+		requestedPermissions.Api || requestedPermissions.Realtime ||
+		requestedPermissions.HasAnyFilePermission()
+	if globalMask.Any() || !permissionsRequested {
+		defaultPerms := settings.ConvertPermissionsToUsers(EffectiveUserDefaults().Account.Permissions)
+		user.Permissions = users.MergeGlobalPermissionsOnCreate(defaultPerms, requestedPermissions, globalMask)
+	} else {
+		user.Permissions = requestedPermissions
+	}
+
 	// Incoming API "scopes" → BackendScopes; FrontendScopes must not remain on the persisted user.
 	if err := applyScopesFromAPI(user); err != nil {
 		return err
 	}

 	// If still no BackendScopes (omitted or invalid API names), same defaults as ApplyUserDefaults.
-	preserveRequirePasswordChange := user.RequirePasswordChange
-	applyUserSettingsDefaults(user)
+	// Snapshot caller-supplied scope permissions by full scope identity so the defaults
+	// application below cannot collapse scopes sharing a source path.
+	requestedScopePermissions := make(map[backendScopeKey]users.SourceFilePermissions, len(user.BackendScopes))
+	for _, scope := range user.BackendScopes {
+		if !scope.Permissions.IsUnset() {
+			requestedScopePermissions[backendScopeKeyFor(scope)] = scope.Permissions
+		}
+	}
+	// Apply profile/scope defaults using the final account permissions (admin flag drives scope defaults).
+	if permissionsRequested {
+		settings.ApplyUserDefaultsFromKeepingAccountPermissions(user, EffectiveUserDefaults())
+	} else {
+		applyUserSettingsDefaults(user)
+	}
 	if preserveRequirePasswordChange {
 		user.RequirePasswordChange = true
 	}
+	user.PermissionsFieldMask = users.GlobalPermissionsFieldMask{}
+	for i, scope := range user.BackendScopes {
+		if perms, ok := requestedScopePermissions[backendScopeKeyFor(scope)]; ok {
+			user.BackendScopes[i].Permissions = perms
+			if user.BackendSourcePermissions == nil {
+				user.BackendSourcePermissions = make(map[string]users.SourceFilePermissions)
+			}
+			user.BackendSourcePermissions[scope.Path] = perms
+		}
+	}
 	defaults := EffectiveUserDefaults()
 	enforced := EffectiveEnforced()
 	settings.ApplyEnforcedDefaultsFrom(user, defaults, enforced)
 	settings.ApplyEnforcedSourcePermissionsFrom(user, GetSourceAccessDefaults(), GetEnforcedSourcePermissions())

 	users.SyncBackendSourcePermissionsMap(user)
+	if !user.Permissions.Admin {
+		settings.ExpandBackendScopesForCreateUserDir(user)
+	}

 	applySidebarLinkDefaults(user)

@@ -1,12 +1,14 @@
 package state

 import (
+	"os"
 	"path/filepath"
 	"strings"
 	"testing"

-	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/files"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 )

 func TestCreateUserValidateUsername(t *testing.T) {
@@ -55,6 +57,76 @@ func TestCreateUserValidateUsername(t *testing.T) {
 	}
 }

+func TestCreateUserCreateUserDirRespectsFinalAdminPermission(t *testing.T) {
+	t.Setenv("FILEBROWSER_ONLYOFFICE_SECRET", "")
+	settings.Initialize("../../../_docker/src/noauth/backend/config.yaml")
+	settings.Env.IsPlaywright = true
+
+	dbPath := filepath.Join(t.TempDir(), "filebrowser.sqlite")
+	if _, err := Initialize(dbPath); err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = Close() })
+
+	root := t.TempDir()
+	source := &settings.Source{
+		Path: root,
+		Config: settings.SourceConfig{
+			CreateUserDir: true,
+		},
+	}
+	settings.Config.Server.Sources = []*settings.Source{source}
+	settings.Config.Server.SourceMap = map[string]*settings.Source{root: source}
+
+	tests := []struct {
+		name      string
+		admin     bool
+		username  string
+		wantScope string
+		wantDir   bool
+	}{
+		{name: "admin keeps source root", admin: true, username: "new-admin", wantScope: "/", wantDir: false},
+		{name: "non-admin gets personal directory", admin: false, username: "new-user", wantScope: "/new-user", wantDir: true},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			d := EffectiveUserDefaults()
+			d.Account.Permissions.Admin = tc.admin
+			SetEffectiveUserDefaultsForTest(t, d)
+
+			user := &users.User{
+				FrontendUser:  users.FrontendUser{Username: tc.username},
+				BackendScopes: []users.BackendScope{{Path: root, Scope: "/"}},
+			}
+			if err := CreateUser(user, "password"); err != nil {
+				t.Fatalf("CreateUser: %v", err)
+			}
+			saved, err := GetUserByUsername(tc.username)
+			if err != nil {
+				t.Fatalf("GetUserByUsername: %v", err)
+			}
+			if saved.Permissions.Admin != tc.admin {
+				t.Fatalf("saved admin=%v, want %v", saved.Permissions.Admin, tc.admin)
+			}
+			if got := saved.BackendScopes[0].Scope; got != tc.wantScope {
+				t.Fatalf("saved scope=%q, want %q", got, tc.wantScope)
+			}
+
+			if err := files.MakeUserDirs(&saved, true); err != nil {
+				t.Fatalf("MakeUserDirs: %v", err)
+			}
+			_, statErr := os.Stat(filepath.Join(root, tc.username))
+			if tc.wantDir && statErr != nil {
+				t.Fatalf("user directory does not exist: %v", statErr)
+			}
+			if !tc.wantDir && !os.IsNotExist(statErr) {
+				t.Fatalf("user directory stat error=%v, want not-exist", statErr)
+			}
+		})
+	}
+}
+
 func TestUpdateUserPatchPreservesTOTPSecret(t *testing.T) {
 	t.Setenv("FILEBROWSER_ONLYOFFICE_SECRET", "")
 	settings.Initialize("../../../_docker/src/noauth/backend/config.yaml")
@@ -259,7 +331,7 @@ func TestUpdateUserClearsTOTPWhenOtpDisabled(t *testing.T) {

 	u := &users.User{
 		FrontendUser: users.FrontendUser{
-			Username: "alice",
+			Username:   "alice",
 			OtpEnabled: true,
 		},
 	}
@@ -310,11 +382,11 @@ func TestUpdateUserPatchPreservesBackendSourcePermissions(t *testing.T) {
 	scopePerms := users.SourceFilePermissions{View: true, Download: true, Modify: true}
 	u := &users.User{
 		FrontendUser: users.FrontendUser{
-			Username: "alice",
+			Username:    "alice",
 			Permissions: users.Permissions{Admin: true},
 		},
 		BackendScopes: []users.BackendScope{{Path: "/data/a", Scope: "/", Permissions: scopePerms}},
-		Version:     users.SourcePermissionsMigrationVersion,
+		Version:       users.SourcePermissionsMigrationVersion,
 	}
 	if err = CreateUser(u, "password"); err != nil {
 		t.Fatal(err)
@@ -341,3 +413,242 @@ func TestUpdateUserPatchPreservesBackendSourcePermissions(t *testing.T) {
 	}
 }

+func TestCreateUserKeepsRequestedPermissions(t *testing.T) {
+	original := settings.Config
+	t.Cleanup(func() { settings.Config = original })
+	settings.Config = settings.SetDefaults(true)
+	source := &settings.Source{Path: "/data/a", Name: "a", Config: settings.SourceConfig{
+		DefaultEnabled:     true,
+		DefaultPermissions: users.SourceFilePermissions{View: true, Download: true, Modify: true, Create: true},
+	}}
+	settings.Config.Server.Sources = []*settings.Source{source}
+	settings.Config.Server.SourceMap = map[string]*settings.Source{source.Path: source}
+	settings.Config.Server.NameToSource = map[string]*settings.Source{source.Name: source}
+	settings.InitializeUserResolvers()
+
+	dbPath := filepath.Join(t.TempDir(), "filebrowser.sqlite")
+	_, err := Initialize(dbPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = Close() })
+
+	requested := users.SourceFilePermissions{View: true, Download: true, Delete: true}
+	u := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:       "alice",
+			Permissions:    users.Permissions{Admin: true, Share: true, Api: true, Realtime: true},
+			FrontendScopes: []users.FrontendScope{{Name: "a", Scope: "/", Permissions: &requested}},
+		},
+	}
+	if err = CreateUser(u, "password"); err != nil {
+		t.Fatal(err)
+	}
+
+	loaded, err := GetUserByUsername("alice")
+	if err != nil {
+		t.Fatal(err)
+	}
+	wantPerms := users.Permissions{Admin: true, Share: true, Api: true, Realtime: true}
+	if loaded.Permissions != wantPerms {
+		t.Fatalf("permissions = %+v, want %+v", loaded.Permissions, wantPerms)
+	}
+	if len(loaded.BackendScopes) == 0 {
+		t.Fatal("expected a scope for the requested source")
+	}
+	got := loaded.BackendScopes[0].Permissions
+	if got.View != requested.View || got.Download != requested.Download || got.Modify != requested.Modify ||
+		got.Create != requested.Create || got.Delete != requested.Delete {
+		t.Fatalf("scope permissions = %+v, want %+v", got, requested)
+	}
+}
+
+// Non-admin create with another account flag set must not keep admin-level source file
+// permissions that applyUserSettingsDefaults would assign while defaults still had Admin.
+func TestCreateUserNonAdminDoesNotKeepAdminScopePermissions(t *testing.T) {
+	original := settings.Config
+	t.Cleanup(func() { settings.Config = original })
+	settings.Config = settings.SetDefaults(true)
+	sourceDefaults := users.SourceFilePermissions{View: true, Download: true, Modify: true, Create: true}
+	source := &settings.Source{Path: "/data/a", Name: "a", Config: settings.SourceConfig{
+		DefaultEnabled:     true,
+		DefaultPermissions: sourceDefaults,
+	}}
+	settings.Config.Server.Sources = []*settings.Source{source}
+	settings.Config.Server.SourceMap = map[string]*settings.Source{source.Path: source}
+	settings.Config.Server.NameToSource = map[string]*settings.Source{source.Name: source}
+	settings.InitializeUserResolvers()
+
+	dbPath := filepath.Join(t.TempDir(), "filebrowser.sqlite")
+	if _, err := Initialize(dbPath); err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = Close() })
+
+	d := EffectiveUserDefaults()
+	d.Account.Permissions.Admin = true
+	d.Account.Permissions.Share = false
+	SetEffectiveUserDefaultsForTest(t, d)
+
+	u := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:    "bob",
+			Permissions: users.Permissions{Admin: false, Share: true},
+		},
+	}
+	if err := CreateUser(u, "password"); err != nil {
+		t.Fatal(err)
+	}
+
+	loaded, err := GetUserByUsername("bob")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if loaded.Permissions.Admin {
+		t.Fatal("expected non-admin account permissions")
+	}
+	if !loaded.Permissions.Share {
+		t.Fatal("expected requested share permission to be kept")
+	}
+	if len(loaded.BackendScopes) == 0 {
+		t.Fatal("expected default-enabled source scope")
+	}
+	got := loaded.BackendScopes[0].Permissions
+	adminPerms := settings.AdminSourceFilePermissions()
+	if got.Delete == adminPerms.Delete && got.Modify == adminPerms.Modify && got.Create == adminPerms.Create {
+		t.Fatalf("non-admin kept admin scope permissions: %+v", got)
+	}
+	want := settings.DefaultSourceFilePermissions()
+	if got.View != want.View || got.Download != want.Download || got.Modify != want.Modify ||
+		got.Create != want.Create || got.Delete != want.Delete {
+		t.Fatalf("scope permissions = %+v, want non-admin defaults %+v", got, want)
+	}
+}
+
+func setupCreateUserDefaultsTest(t *testing.T) {
+	t.Helper()
+	original := settings.Config
+	t.Cleanup(func() { settings.Config = original })
+	settings.Config = settings.SetDefaults(true)
+	settings.Config.UserDefaults.Account.Permissions.Share = true
+	settings.Config.UserDefaults.Account.Permissions.Api = true
+	settings.Config.UserDefaults.Account.Permissions.Realtime = true
+	d := EffectiveUserDefaults()
+	d.Account.Permissions.Share = true
+	d.Account.Permissions.Api = true
+	d.Account.Permissions.Realtime = true
+	SetEffectiveUserDefaultsForTest(t, d)
+	source := &settings.Source{Path: "/data/a", Name: "a", Config: settings.SourceConfig{
+		DefaultEnabled:     true,
+		DefaultPermissions: users.SourceFilePermissions{View: true, Download: true},
+	}}
+	settings.Config.Server.Sources = []*settings.Source{source}
+	settings.Config.Server.SourceMap = map[string]*settings.Source{source.Path: source}
+	settings.Config.Server.NameToSource = map[string]*settings.Source{source.Name: source}
+	settings.InitializeUserResolvers()
+
+	dbPath := filepath.Join(t.TempDir(), "filebrowser.sqlite")
+	if _, err := Initialize(dbPath); err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = Close() })
+}
+
+// Explicit all-false account permissions must not inherit Admin from user defaults.
+func TestCreateUserAllFalsePermissionsDoesNotInheritAdminDefaults(t *testing.T) {
+	setupCreateUserDefaultsTest(t)
+
+	d := EffectiveUserDefaults()
+	d.Account.Permissions.Admin = true
+	d.Account.Permissions.Share = true
+	d.Account.Permissions.Api = true
+	SetEffectiveUserDefaultsForTest(t, d)
+
+	u := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:    "carol",
+			Permissions: users.MarkPermissionsConfigured(users.Permissions{}),
+		},
+	}
+	if err := CreateUser(u, "password"); err != nil {
+		t.Fatal(err)
+	}
+
+	loaded, err := GetUserByUsername("carol")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if loaded.Permissions.Admin || loaded.Permissions.Share || loaded.Permissions.Api || loaded.Permissions.Realtime {
+		t.Fatalf("expected all-false account permissions, got %+v", loaded.Permissions)
+	}
+}
+
+func TestCreateUserAppliesDefaultGlobalPermissionsWhenOmitted(t *testing.T) {
+	setupCreateUserDefaultsTest(t)
+
+	u := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username: "bob",
+		},
+	}
+	if err := CreateUser(u, "password"); err != nil {
+		t.Fatal(err)
+	}
+
+	loaded, err := GetUserByUsername("bob")
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := users.Permissions{Share: true, Api: true, Realtime: true}
+	if loaded.Permissions != want {
+		t.Fatalf("permissions = %+v, want %+v", loaded.Permissions, want)
+	}
+}
+
+func TestCreateUserPartialGlobalPermissionsMask(t *testing.T) {
+	setupCreateUserDefaultsTest(t)
+
+	u := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:    "dave",
+			Permissions: users.Permissions{Admin: true},
+		},
+		PermissionsFieldMask: users.GlobalPermissionsFieldMask{Admin: true},
+	}
+	if err := CreateUser(u, "password"); err != nil {
+		t.Fatal(err)
+	}
+
+	loaded, err := GetUserByUsername("dave")
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := users.Permissions{Admin: true, Share: true, Api: true, Realtime: true}
+	if loaded.Permissions != want {
+		t.Fatalf("permissions = %+v, want %+v", loaded.Permissions, want)
+	}
+}
+
+func TestCreateUserExplicitFalseOverridesDefault(t *testing.T) {
+	setupCreateUserDefaultsTest(t)
+
+	u := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:    "erin",
+			Permissions: users.Permissions{Share: false, Api: false},
+		},
+		PermissionsFieldMask: users.GlobalPermissionsFieldMask{Share: true, Api: true},
+	}
+	if err := CreateUser(u, "password"); err != nil {
+		t.Fatal(err)
+	}
+
+	loaded, err := GetUserByUsername("erin")
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := users.Permissions{Share: false, Api: false, Realtime: true}
+	if loaded.Permissions != want {
+		t.Fatalf("permissions = %+v, want %+v", loaded.Permissions, want)
+	}
+}
@@ -3,11 +3,14 @@
 package testutil

 import (
+	"log"
+	"os"
 	"testing"

 	"golang.org/x/crypto/bcrypt"

 	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+	"github.com/gtsteffaniak/go-logger/logger"
 )

 // Main lowers the bcrypt cost before running the package's tests. Under the
@@ -16,7 +19,27 @@ import (
 // QuickSetup, so every fresh database pays it). Call it from TestMain:
 //
 //	func TestMain(m *testing.M) { os.Exit(testutil.Main(m)) }
+//
+// It also quiets INFO/DEBUG/WARN logger output so failures are readable.
+// Set FILEBROWSER_TEST_LOG=1 to keep normal logging.
 func Main(m *testing.M) int {
 	utils.BcryptCost = bcrypt.MinCost
+	QuietLogging()
 	return m.Run()
 }
+
+// QuietLogging sends only error/fatal lines to the null device. Safe to call
+// multiple times; no-ops when FILEBROWSER_TEST_LOG is set.
+func QuietLogging() {
+	if os.Getenv("FILEBROWSER_TEST_LOG") != "" {
+		return
+	}
+	logger.DisableCompatibilityMode()
+	if err := logger.EnableCompatibilityMode(logger.JsonConfig{
+		Levels:   "error|fatal",
+		Output:   "stdout",
+		NoColors: true,
+	}); err != nil {
+		log.Println("[ERROR] Failed to set up quiet test logger:", err)
+	}
+}
@@ -229,6 +229,12 @@ func archiveCreateHandler(w http.ResponseWriter, r *http.Request, d *Context) (i
 	if destSource == "" {
 		destSource = req.FromSource
 	}
+	if status, roErr := denyIfSourceReadOnly(destSource); roErr != nil {
+		return status, roErr
+	}
+	if status, roErr := denyIfSourceReadOnly(req.FromSource); req.DeleteAfter && roErr != nil {
+		return status, roErr
+	}
 	destPerms, err := effectiveFilePerms(d, destSource)
 	if err != nil {
 		return http.StatusForbidden, err
@@ -273,7 +279,7 @@ func archiveCreateHandler(w http.ResponseWriter, r *http.Request, d *Context) (i
 	if fullDestParent != fullDestFile && !state.AccessPermitted(idxTo.Path, utils.IndexPathFromNormalized(fullDestParent, true), d.User.Username) {
 		return http.StatusForbidden, fmt.Errorf("access denied to destination parent of %s", req.Destination)
 	}
-	parentReal, _, err := idxTo.GetRealPath(fullDestParent)
+	parentReal, err := idxTo.GetRealPathForMutation(userScopeTo, fullDestParent)
 	if err != nil {
 		return http.StatusBadRequest, fmt.Errorf("destination parent path invalid: %v", err)
 	}
@@ -351,26 +357,26 @@ func archiveCreateHandler(w http.ResponseWriter, r *http.Request, d *Context) (i

 	if req.DeleteAfter {
 		type itemToDelete struct {
-			realPath string
-			isDir    bool
+			indexPath string
+			isDir     bool
 		}
 		var toDelete []itemToDelete
 		for _, full := range itemPaths {
-			realPath, isDir, err := idx.GetRealPath(full)
+			_, isDir, err := idx.GetRealPath(full)
 			if err != nil {
 				continue
 			}
-			toDelete = append(toDelete, itemToDelete{realPath: realPath, isDir: isDir})
+			toDelete = append(toDelete, itemToDelete{indexPath: full, isDir: isDir})
 		}
 		for i := 0; i < len(toDelete); i++ {
 			for j := i + 1; j < len(toDelete); j++ {
-				if len(toDelete[j].realPath) > len(toDelete[i].realPath) {
+				if len(toDelete[j].indexPath) > len(toDelete[i].indexPath) {
 					toDelete[i], toDelete[j] = toDelete[j], toDelete[i]
 				}
 			}
 		}
 		for _, item := range toDelete {
-			if err := files.DeleteFiles(req.FromSource, item.realPath, item.isDir); err != nil {
+			if err := files.DeleteFiles(req.FromSource, userScope, item.indexPath, item.isDir); err != nil {
 				logger.Errorf("Failed to delete source after archive: %v", err)
 			}
 		}
@@ -419,6 +425,14 @@ func unarchiveHandler(w http.ResponseWriter, r *http.Request, d *Context) (int,
 	if req.ToSource == "" {
 		req.ToSource = req.FromSource
 	}
+	if !req.Preview {
+		if status, roErr := denyIfSourceReadOnly(req.ToSource); roErr != nil {
+			return status, roErr
+		}
+	}
+	if status, roErr := denyIfSourceReadOnly(req.FromSource); req.DeleteAfter && !req.Preview && roErr != nil {
+		return status, roErr
+	}
 	destPerms, err := effectiveFilePerms(d, req.ToSource)
 	if err != nil {
 		return http.StatusForbidden, err
@@ -461,7 +475,7 @@ func unarchiveHandler(w http.ResponseWriter, r *http.Request, d *Context) (int,
 	if !state.AccessPermitted(idxFrom.Path, utils.IndexPathFromNormalized(fullArchivePath, true), d.User.Username) {
 		return http.StatusForbidden, fmt.Errorf("access denied to archive %s", req.Path)
 	}
-	archiveReal, _, err := idxFrom.GetRealPath(fullArchivePath)
+	archiveReal, _, err := idxFrom.GetRealPathScoped(userScopeFrom, fullArchivePath)
 	if err != nil {
 		return http.StatusNotFound, fmt.Errorf("archive path not found: %v", err)
 	}
@@ -478,7 +492,7 @@ func unarchiveHandler(w http.ResponseWriter, r *http.Request, d *Context) (int,
 	if !state.AccessPermitted(idxTo.Path, utils.IndexPathFromNormalized(fullDestPath, true), d.User.Username) {
 		return http.StatusForbidden, fmt.Errorf("access denied to destination %s", req.Destination)
 	}
-	destReal, _, err := idxTo.GetRealPath(fullDestPath)
+	destReal, _, err := idxTo.GetRealPathScoped(userScopeTo, fullDestPath)
 	if err != nil {
 		return http.StatusBadRequest, fmt.Errorf("destination path invalid: %v", err)
 	}
@@ -521,11 +535,18 @@ func unarchiveHandler(w http.ResponseWriter, r *http.Request, d *Context) (int,
 		defer zr.Close()
 		return RenderJSON(w, r, archiveencoding.Inspect(zr.File), http.StatusOK)
 	}
+	policy := &extractAccessPolicy{
+		idx:             idxTo,
+		destRealRoot:    destReal,
+		destIndexPrefix: fullDestPath,
+		username:        d.User.Username,
+		perms:           destPerms,
+	}
 	var extractErr error
 	if strings.HasSuffix(lower, ".zip") {
-		extractErr = extractZipWithEncoding(archiveReal, destReal, req.FilenameEncoding)
+		extractErr = extractZipWithEncoding(archiveReal, destReal, req.FilenameEncoding, policy)
 	} else if strings.HasSuffix(lower, ".tar.gz") || (strings.HasSuffix(lower, ".tgz")) {
-		extractErr = extractTarGz(archiveReal, destReal)
+		extractErr = extractTarGz(archiveReal, destReal, policy)
 	} else {
 		return http.StatusBadRequest, fmt.Errorf("unsupported archive format (use .zip or .tar.gz)")
 	}
@@ -533,7 +554,11 @@ func unarchiveHandler(w http.ResponseWriter, r *http.Request, d *Context) (int,
 		if errors.Is(extractErr, archiveencoding.ErrEncoding) {
 			return http.StatusBadRequest, extractErr
 		}
-		return http.StatusInternalServerError, extractErr
+		if errors.Is(extractErr, errExtractAccessDenied) {
+			return http.StatusForbidden, extractErr
+		}
+		logger.Errorf("archive extraction failed: %v", extractErr)
+		return http.StatusInternalServerError, clientExtractError()
 	}

 	if req.DeleteAfter {
@@ -560,7 +585,23 @@ func addFile(source string, path string, d *Context, tarWriter *tar.Writer, zipW
 		return nil // Silently skip this file/folder
 	}

-	realPath, _, _ := idx.GetRealPath(path)
+	// Symlink resolution is contained to the share path for shares and the user
+	// scope otherwise; entries that resolve outside the bound are skipped.
+	boundIndexPath := ""
+	if d.Share.Hash != "" {
+		boundIndexPath = d.Share.Path
+	} else {
+		var err error
+		boundIndexPath, err = d.User.GetScopeForSourceName(source)
+		if err != nil {
+			return err
+		}
+	}
+
+	realPath, _, err := idx.GetRealPathScoped(boundIndexPath, path)
+	if err != nil {
+		return err
+	}
 	info, err := os.Stat(realPath)
 	if err != nil {
 		return err
@@ -590,17 +631,26 @@ func addFile(source string, path string, d *Context, tarWriter *tar.Writer, zipW
 				return nil
 			}

-			// Check access control for each file/folder during walk
-			if d.Share.Hash == "" {
-				indexRelPath := utils.JoinPathAsUnix(path, relPath)
-				indexRelPath = filepath.ToSlash(indexRelPath)
-				indexPath := utils.IndexPathFromNormalized(indexRelPath, true)
-				if !state.AccessPermitted(idx.Path, indexPath, permUser) {
-					if fileInfo.IsDir() {
-						return filepath.SkipDir
-					}
-					return nil
+			// A symlinked entry must resolve inside the bound before its
+			// contents are opened; escaping entries are silently skipped.
+			indexRelPath := utils.JoinPathAsUnix(path, relPath)
+			indexRelPath = filepath.ToSlash(indexRelPath)
+			if _, _, serr := idx.GetRealPathScoped(boundIndexPath, indexRelPath); serr != nil {
+				if fileInfo.IsDir() {
+					return filepath.SkipDir
 				}
+				return nil
+			}
+
+			// Check access control for each file/folder during walk. Share
+			// downloads are checked as the share owner via permUser, so the
+			// owner's deny rules apply to share visitors as well.
+			indexPath := utils.IndexPathFromNormalized(indexRelPath, true)
+			if !state.AccessPermitted(idx.Path, indexPath, permUser) {
+				if fileInfo.IsDir() {
+					return filepath.SkipDir
+				}
+				return nil
 			}

 			// Prepend base folder name unless flatten is true
@@ -1022,9 +1072,63 @@ func safeExtractPath(destDir, name string) (string, error) {
 	if rel == ".." || strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
 		return "", fmt.Errorf("invalid entry path: %q", name)
 	}
+	if _, err = resolvedWritePathUnderDest(destDir, entryAbs); err != nil {
+		logger.Debugf("unarchive: entry %q path resolution: %v", name, err)
+		return "", fmt.Errorf("invalid entry path: %q", name)
+	}
 	return abs, nil
 }

+// resolvedWritePathUnderDest resolves symlink components on entryAbs and ensures the
+// effective write target stays under the resolved destination root.
+func resolvedWritePathUnderDest(destDir, entryAbs string) (string, error) {
+	destResolved, err := filepath.EvalSymlinks(destDir)
+	if err != nil {
+		logger.Debugf("unarchive: eval destination symlinks: %v", err)
+		return "", errEntryPathInvalid
+	}
+	check := entryAbs
+	if resolved, rerr := filepath.EvalSymlinks(check); rerr == nil {
+		check = resolved
+	} else if errors.Is(rerr, os.ErrNotExist) {
+		if li, lerr := os.Lstat(entryAbs); lerr == nil && li.Mode()&os.ModeSymlink != 0 {
+			return "", errEntryPathInvalid
+		}
+		parent := filepath.Dir(entryAbs)
+		leaf := filepath.Base(entryAbs)
+		for {
+			resolvedParent, perr := filepath.EvalSymlinks(parent)
+			if perr == nil {
+				check = filepath.Join(resolvedParent, leaf)
+				break
+			}
+			if !errors.Is(perr, os.ErrNotExist) {
+				logger.Debugf("unarchive: eval entry symlinks: %v", perr)
+				return "", errEntryPathInvalid
+			}
+			next := filepath.Dir(parent)
+			if next == parent {
+				logger.Debugf("unarchive: no existing ancestor for entry under %s", destDir)
+				return "", errEntryPathInvalid
+			}
+			leaf = filepath.Join(filepath.Base(parent), leaf)
+			parent = next
+		}
+	} else {
+		logger.Debugf("unarchive: eval entry symlinks: %v", rerr)
+		return "", errEntryPathInvalid
+	}
+	relCheck, err := filepath.Rel(destResolved, check)
+	if err != nil {
+		logger.Debugf("unarchive: relative path under destination: %v", err)
+		return "", errEntryPathInvalid
+	}
+	if relCheck == ".." || strings.HasPrefix(relCheck, ".."+string(filepath.Separator)) {
+		return "", errEntryPathEscape
+	}
+	return check, nil
+}
+
 // applyArchivedTimesAndPerm sets permission bits and modification time from an archive entry using
 func applyArchivedTimesAndPerm(path string, mode fs.FileMode, modTime time.Time) error {
 	switch {
@@ -1088,17 +1192,42 @@ func extractArchivedDir(destPath string, mode fs.FileMode, modTime time.Time) er
 		perm = fileutils.EffectiveDirPerm()
 	}
 	if err := os.MkdirAll(destPath, perm); err != nil {
-		return fmt.Errorf("mkdir %q: %w", destPath, err)
+		logger.Debugf("unarchive: mkdir: %v", err)
+		return fmt.Errorf("failed to create directory from archive entry")
 	}
 	return applyArchivedTimesAndPerm(destPath, mode, modTime)
 }

+// removeSymlinkDestination removes destPath when it is a symlink so a regular-file
+// write creates the entry at destPath instead of following the link.
+func removeSymlinkDestination(destPath string) error {
+	info, err := os.Lstat(destPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	if info.Mode()&fs.ModeSymlink == 0 {
+		return nil
+	}
+	if err := os.Remove(destPath); err != nil {
+		logger.Debugf("unarchive: remove symlink destination: %v", err)
+		return fmt.Errorf("failed to write file from archive entry")
+	}
+	return nil
+}
+
 // extractArchivedRegularFile writes one regular file from src (closed by this function) and reapplies mode and mtime.
 func extractArchivedRegularFile(destPath string, mode fs.FileMode, modTime time.Time, src io.ReadCloser) error {
 	defer func() { _ = src.Close() }()
 	parent := filepath.Dir(destPath)
 	if err := os.MkdirAll(parent, fileutils.EffectiveDirPerm()); err != nil {
-		return fmt.Errorf("mkdir %q: %w", parent, err)
+		logger.Debugf("unarchive: mkdir parent: %v", err)
+		return fmt.Errorf("failed to create directory from archive entry")
+	}
+	if err := removeSymlinkDestination(destPath); err != nil {
+		return err
 	}
 	perm := mode.Perm()
 	if perm == 0 {
@@ -1106,15 +1235,18 @@ func extractArchivedRegularFile(destPath string, mode fs.FileMode, modTime time.
 	}
 	out, err := os.OpenFile(destPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
 	if err != nil {
-		return err
+		logger.Debugf("unarchive: create file: %v", err)
+		return fmt.Errorf("failed to write file from archive entry")
 	}
 	_, copyErr := io.Copy(out, src)
 	cerr := out.Close()
 	if copyErr != nil {
-		return copyErr
+		logger.Debugf("unarchive: write file: %v", copyErr)
+		return fmt.Errorf("failed to write file from archive entry")
 	}
 	if cerr != nil {
-		return cerr
+		logger.Debugf("unarchive: close file: %v", cerr)
+		return fmt.Errorf("failed to write file from archive entry")
 	}
 	return applyArchivedTimesAndPerm(destPath, mode, modTime)
 }
@@ -1124,25 +1256,69 @@ func extractArchivedSymlink(destRoot, destPath, target string, modTime time.Time
 	target = strings.TrimSpace(target)
 	symParent := filepath.Dir(destPath)
 	if err := os.MkdirAll(symParent, fileutils.EffectiveDirPerm()); err != nil {
-		return fmt.Errorf("mkdir %q: %w", symParent, err)
+		logger.Debugf("unarchive: mkdir symlink parent: %v", err)
+		return fmt.Errorf("failed to create symlink from archive entry")
 	}
 	if err := symlinkTargetStaysUnderDest(destRoot, destPath, target); err != nil {
 		return err
 	}
 	if err := os.Remove(destPath); err != nil && !os.IsNotExist(err) {
-		return err
+		logger.Debugf("unarchive: remove symlink: %v", err)
+		return fmt.Errorf("failed to create symlink from archive entry")
 	}
 	if err := os.Symlink(target, destPath); err != nil {
-		return err
+		logger.Debugf("unarchive: symlink: %v", err)
+		return fmt.Errorf("failed to create symlink from archive entry")
 	}
 	return applyArchivedTimesAndPerm(destPath, fs.ModeSymlink, modTime)
 }

-func extractZip(archivePath, destDir string) error {
-	return extractZipWithEncoding(archivePath, destDir, "")
+// extractArchivedHardLink writes a copy of a regular file extracted earlier from the same
+// archive, which is what a tar hard link entry stands for.
+func extractArchivedHardLink(destRoot, destPath string, h *tar.Header, extracted map[string]os.FileInfo) error {
+	targetPath, err := safeExtractPath(destRoot, h.Linkname)
+	if err != nil {
+		return err
+	}
+	notExtracted := fmt.Errorf("hard link %q points to %q, which is not a file earlier in the archive", h.Name, h.Linkname)
+	written, ok := extracted[targetPath]
+	if !ok {
+		return notExtracted
+	}
+	src, err := os.Open(targetPath)
+	if err != nil {
+		logger.Debugf("unarchive: open hard link target: %v", err)
+		return fmt.Errorf("failed to write file from archive entry")
+	}
+	// A later entry may have replaced the target, e.g. with a symlink to another file.
+	info, err := src.Stat()
+	if err != nil || !info.Mode().IsRegular() || !os.SameFile(info, written) {
+		_ = src.Close()
+		return notExtracted
+	}
+	// The entry may name its own target, directly (GNU tar does this for a file archived
+	// twice). Writing it would truncate the file it copies from. Symlinks at destPath
+	// are replaced by extractArchivedRegularFile instead of being left in place.
+	if dest, err := os.Lstat(destPath); err == nil && dest.Mode().IsRegular() && os.SameFile(dest, info) {
+		return src.Close()
+	}
+	return extractArchivedRegularFile(destPath, h.FileInfo().Mode(), h.ModTime, src)
 }

-func extractZipWithEncoding(archivePath, destDir, charset string) error {
+// recordExtractedFile remembers the regular file written at destPath for later hard links.
+func recordExtractedFile(extracted map[string]os.FileInfo, destPath string) {
+	if info, err := os.Lstat(destPath); err == nil && info.Mode().IsRegular() {
+		extracted[destPath] = info
+	} else {
+		delete(extracted, destPath)
+	}
+}
+
+func extractZip(archivePath, destDir string) error {
+	return extractZipWithEncoding(archivePath, destDir, "", nil)
+}
+
+func extractZipWithEncoding(archivePath, destDir, charset string, policy *extractAccessPolicy) error {
 	r, err := zip.OpenReader(archivePath)
 	if err != nil {
 		return err
@@ -1199,6 +1375,23 @@ func extractZipWithEncoding(archivePath, destDir, charset string) error {
 		return ordered[i].f.Name < ordered[j].f.Name
 	})

+	for _, o := range ordered {
+		destPath, pathErr := safeExtractPath(destDir, o.name)
+		if pathErr != nil {
+			return pathErr
+		}
+		fi := o.f.FileInfo()
+		mode := fi.Mode()
+		isDirEntry := mode.Type() == fs.ModeDir || strings.HasSuffix(o.name, "/") || strings.HasSuffix(o.name, "\\")
+		isSymlink := mode.Type() == fs.ModeSymlink
+		if !isDirEntry && !isSymlink && !mode.IsRegular() {
+			continue
+		}
+		if err = preflightExtractEntry(policy, o.name, destPath, isDirEntry, isSymlink); err != nil {
+			return err
+		}
+	}
+
 	for _, o := range ordered {
 		f := o.f
 		var destPath string
@@ -1250,7 +1443,74 @@ func extractZipWithEncoding(archivePath, destDir, charset string) error {
 	return nil
 }

-func extractTarGz(archivePath, destDir string) error {
+func extractTarGz(archivePath, destDir string, policy *extractAccessPolicy) error {
+	if err := preflightTarGz(archivePath, destDir, policy); err != nil {
+		return err
+	}
+	f, err := os.Open(archivePath)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	gz, err := gzip.NewReader(f)
+	if err != nil {
+		return err
+	}
+	defer gz.Close()
+
+	tr := tar.NewReader(gz)
+	// Regular files written so far, for hard links to point at.
+	extracted := make(map[string]os.FileInfo)
+	for {
+		h, err := tr.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return err
+		}
+		destPath, err := safeExtractPath(destDir, h.Name)
+		if err != nil {
+			return err
+		}
+
+		switch h.Typeflag {
+		case tar.TypeDir:
+			mode := h.FileInfo().Mode()
+			if err = extractArchivedDir(destPath, mode, h.ModTime); err != nil {
+				return err
+			}
+		case tar.TypeReg:
+			mode := h.FileInfo().Mode()
+			if err = extractArchivedRegularFile(destPath, mode, h.ModTime, io.NopCloser(tr)); err != nil {
+				return err
+			}
+			recordExtractedFile(extracted, destPath)
+		case tar.TypeLink:
+			if err = extractArchivedHardLink(destDir, destPath, h, extracted); err != nil {
+				return err
+			}
+			recordExtractedFile(extracted, destPath)
+		case tar.TypeSymlink:
+			if err = extractArchivedSymlink(destDir, destPath, h.Linkname, h.ModTime); err != nil {
+				return err
+			}
+		default:
+			if h.Size > 0 {
+				if _, err = io.CopyN(io.Discard, tr, h.Size); err != nil {
+					return err
+				}
+			}
+		}
+	}
+	return nil
+}
+
+func preflightTarGz(archivePath, destDir string, policy *extractAccessPolicy) error {
+	if policy == nil {
+		return nil
+	}
 	f, err := os.Open(archivePath)
 	if err != nil {
 		return err
@@ -1272,25 +1532,21 @@ func extractTarGz(archivePath, destDir string) error {
 		if err != nil {
 			return err
 		}
-		var destPath string
-		destPath, err = safeExtractPath(destDir, h.Name)
+		destPath, err := safeExtractPath(destDir, h.Name)
 		if err != nil {
 			return err
 		}
-
 		switch h.Typeflag {
 		case tar.TypeDir:
-			mode := h.FileInfo().Mode()
-			if err = extractArchivedDir(destPath, mode, h.ModTime); err != nil {
+			if err = preflightExtractEntry(policy, h.Name, destPath, true, false); err != nil {
 				return err
 			}
-		case tar.TypeReg:
-			mode := h.FileInfo().Mode()
-			if err = extractArchivedRegularFile(destPath, mode, h.ModTime, io.NopCloser(tr)); err != nil {
+		case tar.TypeReg, tar.TypeLink:
+			if err = preflightExtractEntry(policy, h.Name, destPath, false, false); err != nil {
 				return err
 			}
 		case tar.TypeSymlink:
-			if err = extractArchivedSymlink(destDir, destPath, h.Linkname, h.ModTime); err != nil {
+			if err = preflightExtractEntry(policy, h.Name, destPath, false, true); err != nil {
 				return err
 			}
 		default:
@@ -0,0 +1,168 @@
+package web
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing"
+	"github.com/gtsteffaniak/go-logger/logger"
+)
+
+// extractAccessPolicy enforces per-path access rules and source file permissions during unarchive.
+type extractAccessPolicy struct {
+	idx             *indexing.Index
+	destRealRoot    string
+	destIndexPrefix string
+	username        string
+	perms           users.SourceFilePermissions
+}
+
+// allowWriteSymlinkEntry authorizes creating or replacing a symlink at destPath without following the final path component.
+func (p *extractAccessPolicy) allowWriteSymlinkEntry(archiveEntryName, destPath string) error {
+	if p == nil || p.idx == nil {
+		return nil
+	}
+	parent := filepath.Dir(destPath)
+	if err := p.allowWriteIncludingParents(archiveEntryName, parent); err != nil {
+		return err
+	}
+	destResolved, err := filepath.EvalSymlinks(p.destRealRoot)
+	if err != nil {
+		logger.Debugf("unarchive: eval destination symlinks: %v", err)
+		return errEntryPathInvalid
+	}
+	// Resolve the parent chain only: the final component is the link being
+	// created or replaced and must be checked at the link path, not its target.
+	linkPath, err := resolvedLinkPath(destPath)
+	if err != nil {
+		logger.Debugf("unarchive: resolve symlink entry parent: %v", err)
+		return errEntryPathInvalid
+	}
+	rel, err := filepath.Rel(filepath.Clean(destResolved), linkPath)
+	if err != nil {
+		logger.Debugf("unarchive: symlink entry relative path: %v", err)
+		return errEntryPathInvalid
+	}
+	if rel == ".." || strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
+		return errEntryPathEscape
+	}
+	rel = filepath.ToSlash(rel)
+	indexPath := utils.JoinPathAsUnix(p.destIndexPrefix, rel)
+	if !state.AccessPermitted(p.idx.Path, utils.IndexPathFromNormalized(indexPath, true), p.username) {
+		logger.Debugf("unarchive: symlink entry %q denied at index path %s for user %s", archiveEntryName, indexPath, p.username)
+		return newExtractAccessDenied(archiveEntryName)
+	}
+	if _, statErr := os.Lstat(destPath); os.IsNotExist(statErr) {
+		if !p.perms.Create {
+			return fmt.Errorf("%w: create permission required", newExtractAccessDenied(archiveEntryName))
+		}
+		return nil
+	}
+	if !p.perms.Modify {
+		return fmt.Errorf("%w: modify permission required", newExtractAccessDenied(archiveEntryName))
+	}
+	return nil
+}
+
+// resolvedLinkPath resolves symlink components in the parents of p without
+// following the final path component, so checks apply to the link path itself.
+func resolvedLinkPath(p string) (string, error) {
+	parent := filepath.Dir(p)
+	leaf := filepath.Base(p)
+	for {
+		resolved, err := filepath.EvalSymlinks(parent)
+		if err == nil {
+			return filepath.Join(resolved, leaf), nil
+		}
+		if !errors.Is(err, os.ErrNotExist) {
+			return "", err
+		}
+		next := filepath.Dir(parent)
+		if next == parent {
+			return "", err
+		}
+		leaf = filepath.Join(filepath.Base(parent), leaf)
+		parent = next
+	}
+}
+
+// allowWrite checks index access and source Create/Modify permissions for one destination path.
+func (p *extractAccessPolicy) allowWrite(archiveEntryName, destPath string) error {
+	if p == nil || p.idx == nil {
+		return nil
+	}
+	effectivePath, err := resolvedWritePathUnderDest(p.destRealRoot, destPath)
+	if err != nil {
+		return err
+	}
+	destResolved, err := filepath.EvalSymlinks(p.destRealRoot)
+	if err != nil {
+		logger.Debugf("unarchive: eval destination symlinks: %v", err)
+		return errEntryPathInvalid
+	}
+	rel, err := filepath.Rel(filepath.Clean(destResolved), filepath.Clean(effectivePath))
+	if err != nil {
+		logger.Debugf("unarchive: entry relative path: %v", err)
+		return errEntryPathInvalid
+	}
+	rel = filepath.ToSlash(rel)
+	indexPath := utils.JoinPathAsUnix(p.destIndexPrefix, rel)
+	if !state.AccessPermitted(p.idx.Path, utils.IndexPathFromNormalized(indexPath, true), p.username) {
+		logger.Debugf("unarchive: entry %q denied at index path %s for user %s", archiveEntryName, indexPath, p.username)
+		return newExtractAccessDenied(archiveEntryName)
+	}
+	if _, statErr := os.Stat(destPath); os.IsNotExist(statErr) {
+		if !p.perms.Create {
+			return fmt.Errorf("%w: create permission required", newExtractAccessDenied(archiveEntryName))
+		}
+		return nil
+	}
+	if !p.perms.Modify {
+		return fmt.Errorf("%w: modify permission required", newExtractAccessDenied(archiveEntryName))
+	}
+	return nil
+}
+
+// allowWriteIncludingParents authorizes destPath and every missing ancestor directory that extraction would create.
+func (p *extractAccessPolicy) allowWriteIncludingParents(archiveEntryName, destPath string) error {
+	if p == nil || p.idx == nil {
+		return nil
+	}
+	destRoot := filepath.Clean(p.destRealRoot)
+	var missingParents []string
+	for dir := filepath.Dir(destPath); ; dir = filepath.Dir(dir) {
+		cleanDir := filepath.Clean(dir)
+		if cleanDir == destRoot {
+			break
+		}
+		rel, relErr := filepath.Rel(destRoot, cleanDir)
+		if relErr != nil || rel == ".." || strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
+			break
+		}
+		if _, statErr := os.Stat(cleanDir); os.IsNotExist(statErr) {
+			missingParents = append(missingParents, cleanDir)
+		}
+	}
+	for i := len(missingParents) - 1; i >= 0; i-- {
+		if err := p.allowWrite(archiveEntryName, missingParents[i]); err != nil {
+			return err
+		}
+	}
+	return p.allowWrite(archiveEntryName, destPath)
+}
+
+func preflightExtractEntry(policy *extractAccessPolicy, archiveEntryName, destPath string, isDir, isSymlink bool) error {
+	if policy == nil {
+		return nil
+	}
+	if isSymlink {
+		return policy.allowWriteSymlinkEntry(archiveEntryName, destPath)
+	}
+	return policy.allowWriteIncludingParents(archiveEntryName, destPath)
+}
@@ -0,0 +1,525 @@
+package web
+
+import (
+	"archive/tar"
+	"archive/zip"
+	"compress/gzip"
+	"errors"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/app"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+)
+
+func setupExtractAccessPolicyTest(t *testing.T) (destDir, sourceRoot, sourceName, username string) {
+	t.Helper()
+	tempDir := t.TempDir()
+	dbPath := filepath.Join(tempDir, "access.sqlite")
+	if _, err := state.Initialize(dbPath); err != nil {
+		t.Fatal(err)
+	}
+	app.MustWireServices(state.Default())
+	t.Cleanup(func() { state.Close() })
+
+	sourceRoot = filepath.Join(tempDir, "data")
+	destDir = filepath.Join(sourceRoot, "dest")
+	if err := os.MkdirAll(destDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	sourceName = "data"
+	settings.Config.Server.SourceMap = map[string]*settings.Source{
+		sourceRoot: {Path: sourceRoot, Name: sourceName},
+	}
+	settings.Config.Server.NameToSource = map[string]*settings.Source{
+		sourceName: settings.Config.Server.SourceMap[sourceRoot],
+	}
+	settings.InitializeUserResolvers()
+
+	username = "extract-user"
+	perms := fullPerms()
+	user := &users.User{
+		ID: 1,
+		FrontendUser: users.FrontendUser{Username: username},
+		BackendScopes: []users.BackendScope{{
+			Path:        sourceRoot,
+			Scope:       "/",
+			Permissions: perms,
+		}},
+		BackendSourcePermissions: map[string]users.SourceFilePermissions{
+			sourceRoot: perms,
+		},
+	}
+	if err := state.CreateUser(user, ""); err != nil {
+		t.Fatal(err)
+	}
+	if err := state.AllowUser(sourceRoot, utils.IndexPathFromNormalized("/", true), username); err != nil {
+		t.Fatal(err)
+	}
+
+	indexing.SetTestIndex(sourceName, sourceRoot)
+	t.Cleanup(func() { indexing.ClearTestIndices() })
+
+	return destDir, sourceRoot, sourceName, username
+}
+
+func testExtractPolicy(t *testing.T, destDir, sourceName, username string, perms users.SourceFilePermissions) *extractAccessPolicy {
+	idx := indexing.GetIndex(sourceName)
+	if idx == nil {
+		t.Fatal("missing index")
+	}
+	return &extractAccessPolicy{
+		idx:             idx,
+		destRealRoot:    destDir,
+		destIndexPrefix: "/dest",
+		username:        username,
+		perms:           perms,
+	}
+}
+
+func writeTestZip(t *testing.T, path string, write func(zw *zip.Writer) error) {
+	t.Helper()
+	f, err := os.Create(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	zw := zip.NewWriter(f)
+	if err := write(zw); err != nil {
+		t.Fatal(err)
+	}
+	if err := zw.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err := f.Close(); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func writeTestTarGz(t *testing.T, path string, write func(tw *tar.Writer) error) {
+	t.Helper()
+	f, err := os.Create(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	gz := gzip.NewWriter(f)
+	tw := tar.NewWriter(gz)
+	if err := write(tw); err != nil {
+		t.Fatal(err)
+	}
+	if err := tw.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err := gz.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err := f.Close(); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func fullPerms() users.SourceFilePermissions {
+	return users.SourceFilePermissions{
+		View: true, Download: true, Modify: true, Create: true, Delete: true,
+	}
+}
+
+func requireExtractAccessDenied(t *testing.T, err error, destReal string, wantEntryInMsg string) {
+	t.Helper()
+	if !errors.Is(err, errExtractAccessDenied) {
+		t.Fatalf("expected access-rule denial, got %v", err)
+	}
+	if !strings.HasPrefix(err.Error(), "access denied: ") {
+		t.Fatalf("unexpected denial message: %v", err)
+	}
+	if strings.Contains(err.Error(), destReal) {
+		t.Fatalf("denial error leaked real path: %v", err)
+	}
+	if wantEntryInMsg != "" && !strings.Contains(err.Error(), wantEntryInMsg) {
+		t.Fatalf("expected archive entry %q in %v", wantEntryInMsg, err)
+	}
+}
+
+func TestExtractZipWithEncoding_accessPolicy(t *testing.T) {
+	t.Run("allowed creation", func(t *testing.T) {
+		destDir, _, sourceName, username := setupExtractAccessPolicyTest(t)
+		zipPath := filepath.Join(t.TempDir(), "ok.zip")
+		writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+			w, err := zw.Create("new.txt")
+			if err != nil {
+				return err
+			}
+			_, err = w.Write([]byte("ok"))
+			return err
+		})
+		policy := testExtractPolicy(t, destDir, sourceName, username, fullPerms())
+		if err := extractZipWithEncoding(zipPath, destDir, "", policy); err != nil {
+			t.Fatalf("extract: %v", err)
+		}
+	})
+
+	t.Run("fails when parent path denied by access rules without writing", func(t *testing.T) {
+		destDir, sourceRoot, sourceName, username := setupExtractAccessPolicyTest(t)
+		if err := state.DenyUser(sourceRoot, utils.IndexPathFromNormalized("/dest/blocked", true), username); err != nil {
+			t.Fatal(err)
+		}
+		zipPath := filepath.Join(t.TempDir(), "parent.zip")
+		writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+			w, err := zw.Create("allowed.txt")
+			if err != nil {
+				return err
+			}
+			if _, err = w.Write([]byte("ok")); err != nil {
+				return err
+			}
+			w, err = zw.Create("blocked/child.txt")
+			if err != nil {
+				return err
+			}
+			_, err = w.Write([]byte("nope"))
+			return err
+		})
+		policy := testExtractPolicy(t, destDir, sourceName, username, fullPerms())
+		err := extractZipWithEncoding(zipPath, destDir, "", policy)
+		requireExtractAccessDenied(t, err, destDir, "blocked/child.txt")
+		if _, statErr := os.Stat(filepath.Join(destDir, "allowed.txt")); !os.IsNotExist(statErr) {
+			t.Fatal("preflight should prevent partial extraction")
+		}
+		if _, statErr := os.Stat(filepath.Join(destDir, "blocked", "child.txt")); !os.IsNotExist(statErr) {
+			t.Fatal("expected denied path not written")
+		}
+	})
+
+	t.Run("denied modification", func(t *testing.T) {
+		destDir, _, sourceName, username := setupExtractAccessPolicyTest(t)
+		existing := filepath.Join(destDir, "existing.txt")
+		if err := os.WriteFile(existing, []byte("old"), 0o644); err != nil {
+			t.Fatal(err)
+		}
+		zipPath := filepath.Join(t.TempDir(), "mod.zip")
+		writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+			w, err := zw.Create("existing.txt")
+			if err != nil {
+				return err
+			}
+			_, err = w.Write([]byte("new"))
+			return err
+		})
+		noModify := fullPerms()
+		noModify.Modify = false
+		policy := testExtractPolicy(t, destDir, sourceName, username, noModify)
+		if err := extractZipWithEncoding(zipPath, destDir, "", policy); err == nil {
+			t.Fatal("expected modify permission error")
+		}
+	})
+
+	t.Run("fails when entry resolves through denied symlink target", func(t *testing.T) {
+		destDir, sourceRoot, sourceName, username := setupExtractAccessPolicyTest(t)
+		blocked := filepath.Join(destDir, "blocked")
+		if err := os.MkdirAll(blocked, 0o755); err != nil {
+			t.Fatal(err)
+		}
+		alias := filepath.Join(destDir, "alias")
+		if err := os.Symlink("blocked", alias); err != nil {
+			t.Fatal(err)
+		}
+		if err := state.DenyUser(sourceRoot, utils.IndexPathFromNormalized("/dest/blocked", true), username); err != nil {
+			t.Fatal(err)
+		}
+		zipPath := filepath.Join(t.TempDir(), "symlink.zip")
+		writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+			w, err := zw.Create("alias/secret.txt")
+			if err != nil {
+				return err
+			}
+			_, err = w.Write([]byte("nope"))
+			return err
+		})
+		policy := testExtractPolicy(t, destDir, sourceName, username, fullPerms())
+		requireExtractAccessDenied(t, extractZipWithEncoding(zipPath, destDir, "", policy), destDir, "alias/secret.txt")
+		if _, err := os.Stat(filepath.Join(destDir, "alias", "secret.txt")); !os.IsNotExist(err) {
+			t.Fatal("expected entry under denied target not written")
+		}
+	})
+
+	t.Run("symlink entry requires policy", func(t *testing.T) {
+		destDir, _, sourceName, username := setupExtractAccessPolicyTest(t)
+		zipPath := filepath.Join(t.TempDir(), "link.zip")
+		writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+			hdr := &zip.FileHeader{Name: "thelink", Method: zip.Store}
+			hdr.SetMode(0o777 | os.ModeSymlink)
+			w, err := zw.CreateHeader(hdr)
+			if err != nil {
+				return err
+			}
+			_, err = w.Write([]byte("target.txt"))
+			return err
+		})
+		if err := os.WriteFile(filepath.Join(destDir, "target.txt"), []byte("x"), 0o644); err != nil {
+			t.Fatal(err)
+		}
+		noCreate := fullPerms()
+		noCreate.Create = false
+		policy := testExtractPolicy(t, destDir, sourceName, username, noCreate)
+		if err := extractZipWithEncoding(zipPath, destDir, "", policy); err == nil {
+			t.Fatal("expected create permission error for symlink entry")
+		}
+	})
+
+	t.Run("skips denied symlink entry at link path", func(t *testing.T) {
+		destDir, sourceRoot, sourceName, username := setupExtractAccessPolicyTest(t)
+		if err := os.WriteFile(filepath.Join(destDir, "allowed.txt"), []byte("x"), 0o644); err != nil {
+			t.Fatal(err)
+		}
+		linkName := "secret-link"
+		linkPath := filepath.Join(destDir, linkName)
+		if err := os.Symlink("allowed.txt", linkPath); err != nil {
+			t.Fatal(err)
+		}
+		if err := state.DenyUser(sourceRoot, utils.IndexPathFromNormalized("/dest/"+linkName, true), username); err != nil {
+			t.Fatal(err)
+		}
+		zipPath := filepath.Join(t.TempDir(), "replace-link.zip")
+		writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+			hdr := &zip.FileHeader{Name: linkName, Method: zip.Store}
+			hdr.SetMode(0o777 | os.ModeSymlink)
+			w, err := zw.CreateHeader(hdr)
+			if err != nil {
+				return err
+			}
+			_, err = w.Write([]byte("other.txt"))
+			return err
+		})
+		policy := testExtractPolicy(t, destDir, sourceName, username, fullPerms())
+		requireExtractAccessDenied(t, extractZipWithEncoding(zipPath, destDir, "", policy), destDir, linkName)
+		target, err := os.Readlink(linkPath)
+		if err != nil || target != "allowed.txt" {
+			t.Fatalf("symlink should be unchanged, target=%q err=%v", target, err)
+		}
+	})
+
+	t.Run("fails mixed archive when any entry denied without partial write", func(t *testing.T) {
+		destDir, sourceRoot, sourceName, username := setupExtractAccessPolicyTest(t)
+		if err := state.DenyUser(sourceRoot, utils.IndexPathFromNormalized("/dest/hidden.txt", true), username); err != nil {
+			t.Fatal(err)
+		}
+		zipPath := filepath.Join(t.TempDir(), "mixed.zip")
+		writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+			for _, name := range []string{"public.txt", "hidden.txt"} {
+				w, err := zw.Create(name)
+				if err != nil {
+					return err
+				}
+				if _, err = w.Write([]byte("data")); err != nil {
+					return err
+				}
+			}
+			return nil
+		})
+		policy := testExtractPolicy(t, destDir, sourceName, username, fullPerms())
+		requireExtractAccessDenied(t, extractZipWithEncoding(zipPath, destDir, "", policy), destDir, "hidden.txt")
+		if _, err := os.Stat(filepath.Join(destDir, "public.txt")); !os.IsNotExist(err) {
+			t.Fatal("preflight should prevent partial extraction")
+		}
+		if _, err := os.Stat(filepath.Join(destDir, "hidden.txt")); !os.IsNotExist(err) {
+			t.Fatal("expected hidden.txt not written")
+		}
+	})
+
+	t.Run("dangling symlink requires modify", func(t *testing.T) {
+		destDir, _, sourceName, username := setupExtractAccessPolicyTest(t)
+		linkName := "dangling"
+		if err := os.Symlink("missing-target", filepath.Join(destDir, linkName)); err != nil {
+			t.Fatal(err)
+		}
+		zipPath := filepath.Join(t.TempDir(), "replace-dangling.zip")
+		writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+			hdr := &zip.FileHeader{Name: linkName, Method: zip.Store}
+			hdr.SetMode(0o777 | os.ModeSymlink)
+			w, err := zw.CreateHeader(hdr)
+			if err != nil {
+				return err
+			}
+			_, err = w.Write([]byte("new-target"))
+			return err
+		})
+		perms := fullPerms()
+		perms.Modify = false
+		policy := testExtractPolicy(t, destDir, sourceName, username, perms)
+		if err := extractZipWithEncoding(zipPath, destDir, "", policy); err == nil {
+			t.Fatal("expected modify permission error when replacing dangling symlink")
+		}
+	})
+}
+
+func TestExtractTarGz_accessPolicy(t *testing.T) {
+	t.Run("allowed creation", func(t *testing.T) {
+		destDir, _, sourceName, username := setupExtractAccessPolicyTest(t)
+		archivePath := filepath.Join(t.TempDir(), "ok.tar.gz")
+		writeTestTarGz(t, archivePath, func(tw *tar.Writer) error {
+			if err := tw.WriteHeader(&tar.Header{Name: "new.txt", Mode: 0o644, Size: 2, Typeflag: tar.TypeReg}); err != nil {
+				return err
+			}
+			_, err := io.WriteString(tw, "ok")
+			return err
+		})
+		if err := extractTarGz(archivePath, destDir, testExtractPolicy(t, destDir, sourceName, username, fullPerms())); err != nil {
+			t.Fatalf("extract: %v", err)
+		}
+	})
+
+	t.Run("fails when parent path denied by access rules", func(t *testing.T) {
+		destDir, sourceRoot, sourceName, username := setupExtractAccessPolicyTest(t)
+		if err := state.DenyUser(sourceRoot, utils.IndexPathFromNormalized("/dest/blocked", true), username); err != nil {
+			t.Fatal(err)
+		}
+		archivePath := filepath.Join(t.TempDir(), "parent.tar.gz")
+		writeTestTarGz(t, archivePath, func(tw *tar.Writer) error {
+			if err := tw.WriteHeader(&tar.Header{Name: "blocked/child.txt", Mode: 0o644, Size: 4, Typeflag: tar.TypeReg}); err != nil {
+				return err
+			}
+			_, err := io.WriteString(tw, "nope")
+			return err
+		})
+		policy := testExtractPolicy(t, destDir, sourceName, username, fullPerms())
+		requireExtractAccessDenied(t, extractTarGz(archivePath, destDir, policy), destDir, "blocked/child.txt")
+	})
+
+	t.Run("symlink entry requires policy", func(t *testing.T) {
+		destDir, _, sourceName, username := setupExtractAccessPolicyTest(t)
+		archivePath := filepath.Join(t.TempDir(), "link.tar.gz")
+		writeTestTarGz(t, archivePath, func(tw *tar.Writer) error {
+			return tw.WriteHeader(&tar.Header{
+				Name:     "thelink",
+				Mode:     0o777,
+				Typeflag: tar.TypeSymlink,
+				Linkname: "target.txt",
+			})
+		})
+		if err := os.WriteFile(filepath.Join(destDir, "target.txt"), []byte("x"), 0o644); err != nil {
+			t.Fatal(err)
+		}
+		noCreate := fullPerms()
+		noCreate.Create = false
+		policy := testExtractPolicy(t, destDir, sourceName, username, noCreate)
+		if err := extractTarGz(archivePath, destDir, policy); err == nil {
+			t.Fatal("expected create permission error for symlink entry")
+		}
+	})
+
+	t.Run("skips denied symlink entry at link path", func(t *testing.T) {
+		destDir, sourceRoot, sourceName, username := setupExtractAccessPolicyTest(t)
+		if err := os.WriteFile(filepath.Join(destDir, "allowed.txt"), []byte("x"), 0o644); err != nil {
+			t.Fatal(err)
+		}
+		linkName := "secret-link"
+		if err := os.Symlink("allowed.txt", filepath.Join(destDir, linkName)); err != nil {
+			t.Fatal(err)
+		}
+		if err := state.DenyUser(sourceRoot, utils.IndexPathFromNormalized("/dest/"+linkName, true), username); err != nil {
+			t.Fatal(err)
+		}
+		archivePath := filepath.Join(t.TempDir(), "replace-link.tar.gz")
+		writeTestTarGz(t, archivePath, func(tw *tar.Writer) error {
+			return tw.WriteHeader(&tar.Header{
+				Name:     linkName,
+				Mode:     0o777,
+				Typeflag: tar.TypeSymlink,
+				Linkname: "other.txt",
+			})
+		})
+		policy := testExtractPolicy(t, destDir, sourceName, username, fullPerms())
+		requireExtractAccessDenied(t, extractTarGz(archivePath, destDir, policy), destDir, linkName)
+	})
+}
+
+func TestUnarchiveHandler_accessDeniedAndSanitizesErrors(t *testing.T) {
+	destDir, sourceRoot, sourceName, username := setupExtractAccessPolicyTest(t)
+	user, err := state.GetUserByUsername(username)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := state.DenyUser(sourceRoot, utils.IndexPathFromNormalized("/dest/hidden.txt", true), username); err != nil {
+		t.Fatal(err)
+	}
+
+	archivePath := filepath.Join(sourceRoot, "bundle.zip")
+	writeTestZip(t, archivePath, func(zw *zip.Writer) error {
+		for _, name := range []string{"visible.txt", "hidden.txt"} {
+			w, err := zw.Create(name)
+			if err != nil {
+				return err
+			}
+			if _, err = w.Write([]byte("x")); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+
+	body := `{"fromSource":"data","toSource":"data","path":"/bundle.zip","destination":"/dest"}`
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/resources/unarchive", strings.NewReader(body))
+	status, handlerErr := unarchiveHandler(rec, req, &Context{User: &user})
+	if status != http.StatusForbidden || handlerErr == nil {
+		t.Fatalf("status=%d err=%v body=%s", status, handlerErr, rec.Body.String())
+	}
+	if !strings.Contains(handlerErr.Error(), "access denied: hidden.txt") {
+		t.Fatalf("unexpected error: %v", handlerErr)
+	}
+	if strings.Contains(handlerErr.Error(), destDir) || strings.Contains(handlerErr.Error(), sourceRoot) {
+		t.Fatalf("client error leaked real path: %v", handlerErr)
+	}
+	if _, err := os.Stat(filepath.Join(destDir, "visible.txt")); !os.IsNotExist(err) {
+		t.Fatal("preflight should prevent partial extraction")
+	}
+	if _, err := os.Stat(filepath.Join(destDir, "hidden.txt")); !os.IsNotExist(err) {
+		t.Fatal("expected hidden.txt not written")
+	}
+
+	// Permission failure must not expose the real destination path in the client error.
+	existing := filepath.Join(destDir, "locked.txt")
+	if err := os.WriteFile(existing, []byte("old"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	overwriteZip := filepath.Join(sourceRoot, "overwrite.zip")
+	writeTestZip(t, overwriteZip, func(zw *zip.Writer) error {
+		w, err := zw.Create("locked.txt")
+		if err != nil {
+			return err
+		}
+		_, err = w.Write([]byte("new"))
+		return err
+	})
+	noModify := fullPerms()
+	noModify.Modify = false
+	user.BackendSourcePermissions[sourceRoot] = noModify
+	for i := range user.BackendScopes {
+		if user.BackendScopes[i].Path == sourceRoot {
+			user.BackendScopes[i].Permissions = noModify
+		}
+	}
+	body = `{"fromSource":"data","toSource":"data","path":"/overwrite.zip","destination":"/dest"}`
+	rec = httptest.NewRecorder()
+	req = httptest.NewRequest(http.MethodPost, "/api/resources/unarchive", strings.NewReader(body))
+	status, handlerErr = unarchiveHandler(rec, req, &Context{User: &user})
+	if status != http.StatusForbidden || handlerErr == nil {
+		t.Fatalf("status=%d err=%v", status, handlerErr)
+	}
+	if strings.Contains(handlerErr.Error(), destDir) || strings.Contains(handlerErr.Error(), sourceRoot) {
+		t.Fatalf("client error leaked real path: %v", handlerErr)
+	}
+	if !strings.Contains(handlerErr.Error(), "modify permission required") {
+		t.Fatalf("unexpected client error: %v", handlerErr)
+	}
+	_ = sourceName
+}
@@ -0,0 +1,40 @@
+package web
+
+import (
+	"errors"
+	"fmt"
+)
+
+// errExtractAccessDenied marks access-rule denials during extraction (use errors.Is).
+var errExtractAccessDenied = errors.New("extract access denied")
+
+type extractAccessDeniedError struct {
+	entry string
+}
+
+func (e *extractAccessDeniedError) Error() string {
+	return fmt.Sprintf("access denied: %s", e.entry)
+}
+
+func (e *extractAccessDeniedError) Unwrap() error {
+	return errExtractAccessDenied
+}
+
+func newExtractAccessDenied(archiveEntryName string) error {
+	display := archiveEntryName
+	if normalized, err := normalizeArchiveEntryName(archiveEntryName); err == nil && normalized != "" {
+		display = normalized
+	}
+	return &extractAccessDeniedError{entry: display}
+}
+
+// errEntryPathInvalid and errEntryPathEscape are returned from path resolution without filesystem paths in Error().
+var (
+	errEntryPathInvalid = errors.New("archive entry path is invalid")
+	errEntryPathEscape  = errors.New("archive entry path escapes destination")
+)
+
+// clientExtractError returns a generic extraction failure for HTTP responses (details are logged server-side).
+func clientExtractError() error {
+	return errors.New("archive extraction failed")
+}
@@ -1,7 +1,9 @@
 package web

 import (
+	"archive/tar"
 	"archive/zip"
+	"io"
 	"os"
 	"path/filepath"
 	"strings"
@@ -322,7 +324,7 @@ func TestExtractZipFilenameEncoding(t *testing.T) {
 				t.Fatal(err)
 			}
 			out := t.TempDir()
-			err = extractZipWithEncoding(archivePath, out, tc.charset)
+			err = extractZipWithEncoding(archivePath, out, tc.charset, nil)
 			if tc.invalid {
 				if err == nil {
 					t.Fatal("expected error")
@@ -343,3 +345,215 @@ func TestExtractZipFilenameEncoding(t *testing.T) {
 		})
 	}
 }
+
+func TestExtractTarGz_hardLinks(t *testing.T) {
+	archivePath := filepath.Join(t.TempDir(), "links.tar.gz")
+	writeTestTarGz(t, archivePath, func(tw *tar.Writer) error {
+		if err := tw.WriteHeader(&tar.Header{Name: "proj/a.txt", Mode: 0o644, Size: 4, Typeflag: tar.TypeReg}); err != nil {
+			return err
+		}
+		if _, err := io.WriteString(tw, "same"); err != nil {
+			return err
+		}
+		return tw.WriteHeader(&tar.Header{Name: "proj/sub/b.txt", Mode: 0o644, Typeflag: tar.TypeLink, Linkname: "proj/a.txt"})
+	})
+	destDir := t.TempDir()
+	if err := extractTarGz(archivePath, destDir, nil); err != nil {
+		t.Fatalf("extract: %v", err)
+	}
+	got, err := os.ReadFile(filepath.Join(destDir, "proj", "sub", "b.txt"))
+	if err != nil || string(got) != "same" {
+		t.Fatalf("hard link entry: got %q, %v", got, err)
+	}
+
+	missing := filepath.Join(t.TempDir(), "missing.tar.gz")
+	writeTestTarGz(t, missing, func(tw *tar.Writer) error {
+		return tw.WriteHeader(&tar.Header{Name: "b.txt", Mode: 0o644, Typeflag: tar.TypeLink, Linkname: "a.txt"})
+	})
+	if err := extractTarGz(missing, t.TempDir(), nil); err == nil {
+		t.Fatal("expected an error for a hard link to a file that is not in the archive")
+	}
+
+	// A symlink entry replaces the extracted file before the hard link names it.
+	replaced := filepath.Join(t.TempDir(), "replaced.tar.gz")
+	writeTestTarGz(t, replaced, func(tw *tar.Writer) error {
+		if err := tw.WriteHeader(&tar.Header{Name: "a.txt", Mode: 0o644, Size: 4, Typeflag: tar.TypeReg}); err != nil {
+			return err
+		}
+		if _, err := io.WriteString(tw, "mine"); err != nil {
+			return err
+		}
+		if err := tw.WriteHeader(&tar.Header{Name: "a.txt", Mode: 0o777, Typeflag: tar.TypeSymlink, Linkname: "private/secret.txt"}); err != nil {
+			return err
+		}
+		return tw.WriteHeader(&tar.Header{Name: "b.txt", Mode: 0o644, Typeflag: tar.TypeLink, Linkname: "a.txt"})
+	})
+	replacedDest := t.TempDir()
+	if err := os.MkdirAll(filepath.Join(replacedDest, "private"), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(replacedDest, "private", "secret.txt"), []byte("secret"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if err := extractTarGz(replaced, replacedDest, nil); err == nil {
+		t.Fatal("expected an error for a hard link whose target was replaced by a symlink")
+	}
+	if got, err := os.ReadFile(filepath.Join(replacedDest, "b.txt")); err == nil {
+		t.Fatalf("hard link entry copied the symlink target: %q", got)
+	}
+
+	// A hard link names its own target, as GNU tar writes for a file archived twice,
+	// or names it through a symlink.
+	self := filepath.Join(t.TempDir(), "self.tar.gz")
+	writeTestTarGz(t, self, func(tw *tar.Writer) error {
+		if err := tw.WriteHeader(&tar.Header{Name: "a.txt", Mode: 0o644, Size: 4, Typeflag: tar.TypeReg}); err != nil {
+			return err
+		}
+		if _, err := io.WriteString(tw, "same"); err != nil {
+			return err
+		}
+		if err := tw.WriteHeader(&tar.Header{Name: "c.txt", Mode: 0o777, Typeflag: tar.TypeSymlink, Linkname: "a.txt"}); err != nil {
+			return err
+		}
+		if err := tw.WriteHeader(&tar.Header{Name: "a.txt", Mode: 0o644, Typeflag: tar.TypeLink, Linkname: "a.txt"}); err != nil {
+			return err
+		}
+		return tw.WriteHeader(&tar.Header{Name: "c.txt", Mode: 0o644, Typeflag: tar.TypeLink, Linkname: "a.txt"})
+	})
+	selfDest := t.TempDir()
+	if err := extractTarGz(self, selfDest, nil); err != nil {
+		t.Fatalf("extract: %v", err)
+	}
+	if got, err := os.ReadFile(filepath.Join(selfDest, "a.txt")); err != nil || string(got) != "same" {
+		t.Fatalf("hard link to itself: got %q, %v", got, err)
+	}
+}
+
+func TestExtractTarGz_symlinkDestination(t *testing.T) {
+	t.Run("pre-existing symlink at destination", func(t *testing.T) {
+		destDir := t.TempDir()
+		victim := filepath.Join(destDir, "victim.txt")
+		if err := os.WriteFile(victim, []byte("untouched"), 0o644); err != nil {
+			t.Fatal(err)
+		}
+		outPath := filepath.Join(destDir, "out.txt")
+		if err := os.Symlink("victim.txt", outPath); err != nil {
+			t.Fatal(err)
+		}
+		archivePath := filepath.Join(t.TempDir(), "out.tar.gz")
+		writeTestTarGz(t, archivePath, func(tw *tar.Writer) error {
+			if err := tw.WriteHeader(&tar.Header{Name: "out.txt", Mode: 0o644, Size: 7, Typeflag: tar.TypeReg}); err != nil {
+				return err
+			}
+			_, err := io.WriteString(tw, "payload")
+			return err
+		})
+		if err := extractTarGz(archivePath, destDir, nil); err != nil {
+			t.Fatalf("extract: %v", err)
+		}
+		got, err := os.ReadFile(outPath)
+		if err != nil || string(got) != "payload" {
+			t.Fatalf("out.txt: got %q, %v", got, err)
+		}
+		victimData, err := os.ReadFile(victim)
+		if err != nil || string(victimData) != "untouched" {
+			t.Fatalf("victim.txt should be unchanged: %q, %v", victimData, err)
+		}
+		info, err := os.Lstat(outPath)
+		if err != nil || info.Mode()&os.ModeSymlink != 0 {
+			t.Fatalf("out.txt should be a regular file, mode=%v err=%v", info.Mode(), err)
+		}
+	})
+
+	t.Run("symlink entry then regular file at same path", func(t *testing.T) {
+		destDir := t.TempDir()
+		other := filepath.Join(destDir, "other.txt")
+		if err := os.WriteFile(other, []byte("keep"), 0o644); err != nil {
+			t.Fatal(err)
+		}
+		archivePath := filepath.Join(t.TempDir(), "link_then_reg.tar.gz")
+		writeTestTarGz(t, archivePath, func(tw *tar.Writer) error {
+			if err := tw.WriteHeader(&tar.Header{Name: "link", Mode: 0o777, Typeflag: tar.TypeSymlink, Linkname: "other.txt"}); err != nil {
+				return err
+			}
+			if err := tw.WriteHeader(&tar.Header{Name: "link", Mode: 0o644, Size: 7, Typeflag: tar.TypeReg}); err != nil {
+				return err
+			}
+			_, err := io.WriteString(tw, "written")
+			return err
+		})
+		if err := extractTarGz(archivePath, destDir, nil); err != nil {
+			t.Fatalf("extract: %v", err)
+		}
+		linkPath := filepath.Join(destDir, "link")
+		got, err := os.ReadFile(linkPath)
+		if err != nil || string(got) != "written" {
+			t.Fatalf("link: got %q, %v", got, err)
+		}
+		otherData, err := os.ReadFile(other)
+		if err != nil || string(otherData) != "keep" {
+			t.Fatalf("other.txt should be unchanged: %q, %v", otherData, err)
+		}
+	})
+
+	t.Run("hard link onto symlink to source", func(t *testing.T) {
+		destDir := t.TempDir()
+		archivePath := filepath.Join(t.TempDir(), "hardlink_symlink_dest.tar.gz")
+		writeTestTarGz(t, archivePath, func(tw *tar.Writer) error {
+			if err := tw.WriteHeader(&tar.Header{Name: "a.txt", Mode: 0o644, Size: 4, Typeflag: tar.TypeReg}); err != nil {
+				return err
+			}
+			if _, err := io.WriteString(tw, "same"); err != nil {
+				return err
+			}
+			if err := tw.WriteHeader(&tar.Header{Name: "b.txt", Mode: 0o777, Typeflag: tar.TypeSymlink, Linkname: "a.txt"}); err != nil {
+				return err
+			}
+			return tw.WriteHeader(&tar.Header{Name: "c.txt", Mode: 0o644, Typeflag: tar.TypeLink, Linkname: "a.txt"})
+		})
+		if err := extractTarGz(archivePath, destDir, nil); err != nil {
+			t.Fatalf("extract: %v", err)
+		}
+		cPath := filepath.Join(destDir, "c.txt")
+		got, err := os.ReadFile(cPath)
+		if err != nil || string(got) != "same" {
+			t.Fatalf("c.txt: got %q, %v", got, err)
+		}
+		info, err := os.Lstat(cPath)
+		if err != nil || info.Mode()&os.ModeSymlink != 0 {
+			t.Fatalf("c.txt should be a regular file")
+		}
+	})
+}
+
+func TestExtractZip_symlinkDestination(t *testing.T) {
+	destDir := t.TempDir()
+	victim := filepath.Join(destDir, "victim.txt")
+	if err := os.WriteFile(victim, []byte("untouched"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	outPath := filepath.Join(destDir, "out.txt")
+	if err := os.Symlink("victim.txt", outPath); err != nil {
+		t.Fatal(err)
+	}
+	zipPath := filepath.Join(t.TempDir(), "out.zip")
+	writeTestZip(t, zipPath, func(zw *zip.Writer) error {
+		w, err := zw.Create("out.txt")
+		if err != nil {
+			return err
+		}
+		_, err = w.Write([]byte("payload"))
+		return err
+	})
+	if err := extractZip(zipPath, destDir); err != nil {
+		t.Fatalf("extract: %v", err)
+	}
+	got, err := os.ReadFile(outPath)
+	if err != nil || string(got) != "payload" {
+		t.Fatalf("out.txt: got %q, %v", got, err)
+	}
+	victimData, err := os.ReadFile(victim)
+	if err != nil || string(victimData) != "untouched" {
+		t.Fatalf("victim.txt should be unchanged: %q, %v", victimData, err)
+	}
+}
@@ -594,7 +594,7 @@ func applyNamedApiTokenGlobalCaps(user *users.User, tokenName string) {
 	if !ok {
 		return
 	}
-	if !users.HasAnyGlobalPermission(stored.Permissions) {
+	if users.IsMinimalApiToken(stored) {
 		return
 	}
 	user.Permissions = users.IntersectGlobalPermissions(user.Permissions, stored.Permissions)
@@ -17,6 +17,11 @@ type stubGroupSQL struct {

 func (s *stubGroupSQL) SaveAccessRule(string, string, *access.AccessRule) error { return nil }
 func (s *stubGroupSQL) DeleteAccessRule(string, string) error                  { return nil }
+func (s *stubGroupSQL) AccessRulesLowercaseMigrated() (bool, error) { return false, nil }
+func (s *stubGroupSQL) SetAccessRulesLowercaseMigrated() error      { return nil }
+func (s *stubGroupSQL) MigrateAccessRulePathsLowercase(string, []string, access.RuleMap) error {
+	return nil
+}
 func (s *stubGroupSQL) SaveGroup(string, access.StringSet) error               { return s.saveErr }
 func (s *stubGroupSQL) DeleteGroup(string) error                               { return nil }
 func (s *stubGroupSQL) DeleteGroupWithRules(string, []access.RuleUpsert, []access.RuleKey) error {
@@ -197,9 +197,11 @@ func TestApplyNamedApiTokenGlobalCaps(t *testing.T) {

 	t.Run("custom api token caps globals", func(t *testing.T) {
 		user := *owner
+		customized := false
 		user.Tokens = map[string]users.AuthToken{
 			"customized": {
 				Name: "customized",
+				Minimal: &customized,
 				Permissions: users.Permissions{
 					Admin:  false,
 					Api:    true,
@@ -216,4 +218,20 @@ func TestApplyNamedApiTokenGlobalCaps(t *testing.T) {
 			t.Fatalf("expected api and share, got %#v", user.Permissions)
 		}
 	})
+
+	t.Run("customized zero global caps", func(t *testing.T) {
+		user := *owner
+		customized := false
+		user.Tokens = map[string]users.AuthToken{
+			"locked-down": {
+				Name:        "locked-down",
+				Minimal:     &customized,
+				Permissions: users.Permissions{},
+			},
+		}
+		applyNamedApiTokenGlobalCaps(&user, "locked-down")
+		if user.Permissions.Admin || user.Permissions.Api || user.Permissions.Share {
+			t.Fatalf("customized empty caps should clear globals, got %#v", user.Permissions)
+		}
+	})
 }
@@ -322,7 +322,7 @@ func RawFilesHandler(w http.ResponseWriter, r *http.Request, d *Context, source
 		}
 		_, isDir, err = idx.GetRealPathScoped(d.Share.Path, firstFilePath)
 	} else {
-		_, isDir, err = idx.GetRealPath(firstFilePath)
+		_, isDir, err = idx.GetRealPathScoped(userscope, firstFilePath)
 	}
 	if err != nil {
 		s := realPathErrStatus(err)
@@ -202,7 +202,7 @@ func duplicatesHandler(w http.ResponseWriter, r *http.Request, d *Context) (int,

 	// Generate cache key from all input parameters that affect results
 	// Checksums are always enabled, so cache key doesn't need to include that flag
-	cacheKey := fmt.Sprintf("%s:%s:%d", index.Path, opts.combinedPath, opts.minSize)
+	cacheKey := fmt.Sprintf("%s:%s:%s:%d", index.Path, opts.combinedPath, opts.username, opts.minSize)

 	// Check cache first (before acquiring mutex)
 	if cachedResults, ok := duplicateResultsCache.Get(cacheKey); ok {
@@ -16,11 +16,11 @@ import (
 	"strings"
 	"time"

-	libErrors "github.com/gtsteffaniak/filebrowser/backend/internal/errors"
-	"github.com/gtsteffaniak/filebrowser/backend/internal/quota"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/database/share"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	libErrors "github.com/gtsteffaniak/filebrowser/backend/internal/errors"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/preview"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/quota"
 	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing/iteminfo"
 	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 	"github.com/gtsteffaniak/go-cache/cache"
@@ -127,7 +127,7 @@ var (
 // Per-route-class token buckets (keys: IP or username). Expired entries are dropped by go-cache.
 var (
 	authRateLimitCredentialByIP       = cache.NewCache[*rate.Limiter](authLimiterEntryTTL)
-	authRateLimitCredentialByUsername   = cache.NewCache[*rate.Limiter](authLimiterEntryTTL)
+	authRateLimitCredentialByUsername = cache.NewCache[*rate.Limiter](authLimiterEntryTTL)
 	authRateLimitModerateByIP         = cache.NewCache[*rate.Limiter](authLimiterEntryTTL)
 	authRateLimitOIDCByIP             = cache.NewCache[*rate.Limiter](authLimiterEntryTTL)
 	authRateLimitAuthenticatedByUser  = cache.NewCache[*rate.Limiter](authLimiterEntryTTL)
@@ -256,14 +256,24 @@ func SetUserInResponseWriter(w http.ResponseWriter, user *users.User) {
 func GetRemoteIP(r *http.Request) string {
 	cfg := &settings.Config

+	// Forwarded client headers are only honored when the socket peer is a
+	// configured trusted proxy; otherwise a direct client could spoof its IP.
+	trustedPeer := cfg.Http.TrustProxyHeaders && settings.IsTrustedProxyPeer(r)
+
 	xff := r.Header.Get("X-Forwarded-For")
-	if cfg.Http.TrustProxyHeaders && xff != "" {
-		ips := strings.Split(xff, ",")
-		return strings.TrimSpace(ips[0])
+	if trustedPeer && xff != "" {
+		// Without http.trustedProxies (Unix-socket listener) this returns the
+		// rightmost XFF entry, the client as recorded by the proxy. With trusted proxies
+		// configured, the walk skips proxy hops so multi-hop deployments
+		// (CDN -> reverse proxy -> filebrowser) resolve the real client IP —
+		// keeping per-IP rate limits and auth lockouts per client, not per edge.
+		if ip := settings.TrustedProxyClientIP(xff); ip != "" {
+			return ip
+		}
 	}

 	xri := r.Header.Get("X-Real-IP")
-	if cfg.Http.TrustProxyHeaders && xri != "" {
+	if trustedPeer && xri != "" {
 		return xri
 	}

@@ -645,6 +645,10 @@ func processOnlyOfficeCallback(w http.ResponseWriter, r *http.Request, d *Contex
 			return returnOnlyOfficeSuccess(w, r)
 		}

+		if status, roErr := denyIfSourceReadOnly(source); roErr != nil {
+			return returnOnlyOfficeError(w, r, status, roErr.Error())
+		}
+
 		// Check modify permission for save operations
 		filePerms, permErr := effectiveFilePerms(d, source)
 		if permErr != nil || !filePerms.Modify {
@@ -712,7 +716,7 @@ func processOnlyOfficeCallback(w http.ResponseWriter, r *http.Request, d *Contex
 		}
 		fullIndexPath := utils.JoinPathAsUnix(userScope, path)

-		writeErr := files.WriteFile(source, fullIndexPath, doc.Body)
+		writeErr := files.WriteFile(source, userScope, fullIndexPath, doc.Body)
 		if writeErr != nil {
 			logger.Errorf("OnlyOffice callback: failed to write updated document to path=%s: %v",
 				path, writeErr)
@@ -247,7 +247,7 @@ func TestOnlyOfficeCallbackRetainsKeyWhenSaveFails(t *testing.T) {
 	utils.OnlyOfficeCache.Set(realPath, docKey)

 	writeCalls := 0
-	files.WriteFileFunc = func(string, string, io.Reader) error {
+	files.WriteFileFunc = func(string, string, string, io.Reader) error {
 		writeCalls++
 		return errors.New("write failed")
 	}
@@ -276,7 +276,7 @@ func TestOnlyOfficeCallbackRetainsKeyWhenSaveFails(t *testing.T) {

 	// The document server retries the callback with the same key; the session
 	// must still resolve and the save must be allowed to complete.
-	files.WriteFileFunc = func(string, string, io.Reader) error {
+	files.WriteFileFunc = func(string, string, string, io.Reader) error {
 		writeCalls++
 		return nil
 	}
@@ -334,7 +334,7 @@ func TestOnlyOfficeCallbackSerializesConcurrentSaves(t *testing.T) {
 	writeCalls, active, maxActive := 0, 0, 0
 	writeStarted := make(chan struct{}, 2)
 	writeRelease := make(chan struct{})
-	files.WriteFileFunc = func(string, string, io.Reader) error {
+	files.WriteFileFunc = func(string, string, string, io.Reader) error {
 		writesMu.Lock()
 		writeCalls++
 		active++
@@ -74,10 +74,11 @@ func previewHandler(w http.ResponseWriter, r *http.Request, d *Context) (int, er
 		return http.StatusForbidden, fmt.Errorf("user is not allowed to view files in this source")
 	}
 	fileInfo, err := files.FileInfoFaster(utils.FileOptions{
-		Path:     path,
-		Source:   source,
-		AlbumArt: true, // Extract album art for audio previews
-		Expand:   true,
+		Path:           path,
+		Source:         source,
+		AlbumArt:       true, // Extract album art for audio previews
+		Expand:         true,
+		FollowSymlinks: true,
 	}, d.User)
 	if err != nil {
 		logger.Errorf("error getting file info: %v", err)
@@ -8,6 +8,132 @@ import (
 	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
 )

+func TestGetRemoteIPUsesRightmostForwardedFor(t *testing.T) {
+	orig := settings.Config.Http
+	t.Cleanup(func() { settings.Config.Http = orig })
+	settings.Config.Http.TrustProxyHeaders = true
+	// The socket peer must be a trusted proxy for forwarded headers to be honored.
+	settings.Config.Http.TrustedProxies = []string{"10.0.0.0/8"}
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "10.0.0.1:1234"
+	req.Header.Set("X-Forwarded-For", "203.0.113.50, 198.51.100.7")
+	if got := GetRemoteIP(req); got != "198.51.100.7" {
+		t.Fatalf("GetRemoteIP = %q, want 198.51.100.7", got)
+	}
+}
+
+// With http.trustedProxies set, GetRemoteIP walks the XFF chain past trusted
+// proxy hops so multi-hop deployments (CDN -> proxy -> filebrowser) resolve the
+// real client IP instead of collapsing everyone onto the shared edge address.
+func TestGetRemoteIPTrustedProxies(t *testing.T) {
+	orig := settings.Config.Http
+	t.Cleanup(func() { settings.Config.Http = orig })
+	settings.Config.Http.TrustProxyHeaders = true
+	settings.Config.Http.TrustedProxies = []string{"198.51.100.0/24", "10.0.0.0/8"}
+
+	tests := []struct {
+		name string
+		xff  string
+		want string
+	}{
+		{"multi-hop resolves real client", "203.0.113.50, 198.51.100.7", "203.0.113.50"},
+		{"three hops", "192.0.2.10, 203.0.113.50, 198.51.100.7", "203.0.113.50"},
+		// Client-supplied XFF entries stay untrusted and cannot spoof identity.
+		{"spoofed prefix ignored", "1.2.3.4, 203.0.113.50, 198.51.100.7", "203.0.113.50"},
+		{"empty entries skipped", "203.0.113.50, , 198.51.100.7", "203.0.113.50"},
+		// Every hop trusted: leftmost is closest to the client.
+		{"all entries trusted", "198.51.100.7, 198.51.100.8", "198.51.100.7"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			req := httptest.NewRequest("GET", "http://example.com/", nil)
+			req.RemoteAddr = "10.0.0.1:1234"
+			req.Header.Set("X-Forwarded-For", tt.xff)
+			if got := GetRemoteIP(req); got != tt.want {
+				t.Fatalf("GetRemoteIP = %q, want %q", got, tt.want)
+			}
+		})
+	}
+}
+
+// Bare IPs (not just CIDRs) are accepted in http.trustedProxies.
+func TestGetRemoteIPTrustedProxiesBareIP(t *testing.T) {
+	orig := settings.Config.Http
+	t.Cleanup(func() { settings.Config.Http = orig })
+	settings.Config.Http.TrustProxyHeaders = true
+	settings.Config.Http.TrustedProxies = []string{"198.51.100.7", "10.0.0.1"}
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "10.0.0.1:1234"
+	req.Header.Set("X-Forwarded-For", "203.0.113.50, 198.51.100.7")
+	if got := GetRemoteIP(req); got != "203.0.113.50" {
+		t.Fatalf("GetRemoteIP = %q, want 203.0.113.50", got)
+	}
+}
+
+// Without trustProxyHeaders the XFF chain is ignored entirely.
+func TestGetRemoteIPIgnoresForwardedForWhenUntrusted(t *testing.T) {
+	orig := settings.Config.Http
+	t.Cleanup(func() { settings.Config.Http = orig })
+	settings.Config.Http.TrustProxyHeaders = false
+	settings.Config.Http.TrustedProxies = []string{"198.51.100.0/24"}
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "10.0.0.1:1234"
+	req.Header.Set("X-Forwarded-For", "203.0.113.50, 198.51.100.7")
+	if got := GetRemoteIP(req); got != "10.0.0.1" {
+		t.Fatalf("GetRemoteIP = %q, want 10.0.0.1", got)
+	}
+}
+
+// A direct client that is not a trusted proxy cannot spoof its address with
+// forwarded headers, even when trustProxyHeaders is enabled.
+func TestGetRemoteIPIgnoresForwardedHeadersFromUntrustedPeer(t *testing.T) {
+	orig := settings.Config.Http
+	t.Cleanup(func() { settings.Config.Http = orig })
+	settings.Config.Http.TrustProxyHeaders = true
+	settings.Config.Http.TrustedProxies = []string{"198.51.100.0/24"}
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "192.0.2.99:1234"
+	req.Header.Set("X-Forwarded-For", "1.2.3.4")
+	req.Header.Set("X-Real-IP", "5.6.7.8")
+	if got := GetRemoteIP(req); got != "192.0.2.99" {
+		t.Fatalf("GetRemoteIP = %q, want 192.0.2.99", got)
+	}
+}
+
+// With no trusted proxies configured, forwarded headers are never honored.
+func TestGetRemoteIPIgnoresForwardedHeadersWithoutTrustedProxies(t *testing.T) {
+	orig := settings.Config.Http
+	t.Cleanup(func() { settings.Config.Http = orig })
+	settings.Config.Http.TrustProxyHeaders = true
+	settings.Config.Http.TrustedProxies = nil
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "10.0.0.1:1234"
+	req.Header.Set("X-Forwarded-For", "203.0.113.50")
+	if got := GetRemoteIP(req); got != "10.0.0.1" {
+		t.Fatalf("GetRemoteIP = %q, want 10.0.0.1", got)
+	}
+}
+
+// An IPv4-mapped IPv6 trusted hop in the XFF chain must still be skipped.
+func TestGetRemoteIPMappedTrustedHop(t *testing.T) {
+	orig := settings.Config.Http
+	t.Cleanup(func() { settings.Config.Http = orig })
+	settings.Config.Http.TrustProxyHeaders = true
+	settings.Config.Http.TrustedProxies = []string{"::ffff:198.51.100.0/120"}
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "198.51.100.1:1234"
+	req.Header.Set("X-Forwarded-For", "203.0.113.50, ::ffff:198.51.100.7")
+	if got := GetRemoteIP(req); got != "203.0.113.50" {
+		t.Fatalf("GetRemoteIP = %q, want 203.0.113.50", got)
+	}
+}
+
 func TestGetScheme(t *testing.T) {
 	t.Run("trusted proto", func(t *testing.T) {
 		settings.Config.Http.TrustProxyHeaders = true
@@ -6,9 +6,11 @@ import (
 	"net/http/httptest"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"

+	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/app"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
 	commonerrors "github.com/gtsteffaniak/filebrowser/backend/internal/errors"
@@ -47,9 +49,9 @@ func symlinkPutFixture(t *testing.T) (downloadsPath string, idx *indexing.Index)
 func TestResolvePutRealPath_NewFileViaParent(t *testing.T) {
 	_, idx := symlinkPutFixture(t)

-	realPath, err := resolvePutRealPath(idx, "/projects/newfile.txt")
+	realPath, err := idx.GetRealPathForMutation("", "/projects/newfile.txt")
 	if err != nil {
-		t.Fatalf("resolvePutRealPath: %v", err)
+		t.Fatalf("GetRealPathForMutation: %v", err)
 	}
 	parentReal, isDir, err := idx.GetRealPath("/projects")
 	if err != nil || !isDir {
@@ -64,7 +66,7 @@ func TestResolvePutRealPath_NewFileViaParent(t *testing.T) {
 func TestResolvePutRealPath_RejectsEscapingParent(t *testing.T) {
 	_, idx := symlinkPutFixture(t)

-	_, err := resolvePutRealPath(idx, "/evil/hack.txt")
+	_, err := idx.GetRealPathForMutation("", "/evil/hack.txt")
 	if !errors.Is(err, commonerrors.ErrPathEscapesScope) {
 		t.Fatalf("expected ErrPathEscapesScope, got %v", err)
 	}
@@ -72,7 +74,7 @@ func TestResolvePutRealPath_RejectsEscapingParent(t *testing.T) {

 func TestSanitizePutPathError_NoFilesystemPaths(t *testing.T) {
 	_, idx := symlinkPutFixture(t)
-	_, internalErr := resolvePutRealPath(idx, "/evil/hack.txt")
+	_, internalErr := idx.GetRealPathForMutation("", "/evil/hack.txt")
 	if internalErr == nil {
 		t.Fatal("expected resolution error")
 	}
@@ -118,6 +120,67 @@ func TestResourcePutHandler_CreatesNewFile(t *testing.T) {
 	}
 }

+func TestResourcePutHandler_PreservesFilePermissions(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("Unix permission bits are not supported on Windows")
+	}
+	originalPerm := fileutils.PermFile
+	fileutils.PermFile = 0600
+	t.Cleanup(func() { fileutils.PermFile = originalPerm })
+
+	for _, tc := range []struct {
+		name string
+		mode os.FileMode
+	}{
+		{"new", 0},
+		{"readable", 0604},
+		{"executable", 0755},
+		{"privileged", 0755 | os.ModeSetuid | os.ModeSetgid},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			root := setupPutHTTPTest(t)
+			path := filepath.Join(root, "projects", "edit.txt")
+			if tc.mode != 0 {
+				if err := os.WriteFile(path, []byte("before"), 0600); err != nil {
+					t.Fatal(err)
+				}
+				if err := os.Chmod(path, tc.mode); err != nil {
+					t.Fatal(err)
+				}
+				before, err := os.Stat(path)
+				if err != nil || before.Mode() != tc.mode {
+					t.Fatalf("could not set initial mode: info=%v err=%v", before, err)
+				}
+			}
+			admin, err := state.GetUserByUsername("admin")
+			if err != nil {
+				t.Fatal(err)
+			}
+			req := httptest.NewRequest(http.MethodPut, "/api/resources?source=Downloads&path=/projects/edit.txt", strings.NewReader("after"))
+			status, err := resourcePutHandler(httptest.NewRecorder(), req, &requestContext{User: &admin})
+			if err != nil || status != http.StatusOK {
+				t.Fatalf("put failed: status=%d err=%v", status, err)
+			}
+			content, err := os.ReadFile(path)
+			if err != nil || string(content) != "after" {
+				t.Fatalf("content=%q err=%v", content, err)
+			}
+			info, err := os.Stat(path)
+			if err != nil {
+				t.Fatal(err)
+			}
+			want := tc.mode.Perm()
+			if want == 0 {
+				want = 0600
+			}
+			mode := info.Mode() & (os.ModePerm | os.ModeSetuid | os.ModeSetgid | os.ModeSticky)
+			if mode != want {
+				t.Fatalf("mode=%v want %v", mode, want)
+			}
+		})
+	}
+}
+
 func TestResourcePutHandler_RejectsEscapingParentSymlink(t *testing.T) {
 	downloadsPath := setupPutHTTPTest(t)
 	outside := filepath.Join(filepath.Dir(downloadsPath), "outside-target")
@@ -16,9 +16,10 @@ import (
 	commonerrors "github.com/gtsteffaniak/filebrowser/backend/internal/errors"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/quota"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
-	"github.com/gtsteffaniak/go-logger/logger"
 	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing/iteminfo"
 	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+	"github.com/gtsteffaniak/go-logger/logger"
 )

 func uploadQuotaContext(d *Context, sourceName, fullIndexPath, realPath string, r *http.Request, sessionID string, totalSize int64, hasTotalSize bool) quota.UploadContext {
@@ -35,7 +36,7 @@ func uploadQuotaContext(d *Context, sourceName, fullIndexPath, realPath string,
 }

 func buildUploadQuotaContext(principal *users.User, sourceName, sourcePath, fullIndexPath, realPath, shareHash string, shareLimit int64, sessionID string, totalSize int64, hasTotalSize bool) quota.UploadContext {
-	return quota.UploadContext{
+	ctx := quota.UploadContext{
 		Principal:       principal,
 		SourceName:      sourceName,
 		SourcePath:      sourcePath,
@@ -47,38 +48,17 @@ func buildUploadQuotaContext(principal *users.User, sourceName, sourcePath, full
 		TotalSize:       totalSize,
 		HasKnownSize:    hasTotalSize,
 	}
-}
-
-// resolvePutRealPath maps an index path to a real filesystem path for PUT.
-// Existing files resolve directly; missing final components resolve via the parent directory.
-func resolvePutRealPath(idx *indexing.Index, fullIndexPath string) (string, error) {
-	realPath, isDir, err := idx.GetRealPath(fullIndexPath)
-	if err == nil {
-		if isDir {
-			return "", fmt.Errorf("path is a directory")
+	if realPath != "" {
+		stat, err := os.Stat(realPath)
+		if err == nil && !stat.IsDir() {
+			ctx.PriorFileSize = stat.Size()
+			ctx.HasPriorFileSize = true
+		} else if os.IsNotExist(err) {
+			ctx.PriorFileSize = 0
+			ctx.HasPriorFileSize = true
 		}
-		return realPath, nil
 	}
-	if !isMissingPutTargetError(err) {
-		return "", err
-	}
-
-	parentIndexPath := filepath.Dir(fullIndexPath)
-	if parentIndexPath == "." || parentIndexPath == "" {
-		parentIndexPath = "/"
-	}
-	parentReal, isDir, parentErr := idx.GetRealPath(parentIndexPath)
-	if parentErr != nil {
-		return "", parentErr
-	}
-	if !isDir {
-		return "", fmt.Errorf("parent path is not a directory")
-	}
-	baseName := filepath.Base(strings.TrimSuffix(fullIndexPath, "/"))
-	if baseName == "" || baseName == "." {
-		return "", fmt.Errorf("invalid file path")
-	}
-	return filepath.Join(parentReal, baseName), nil
+	return ctx
 }

 var (
@@ -137,6 +117,16 @@ func finalizeQuotaPut(quotaCtx quota.UploadContext, tempPath, realPath, sourceNa
 		_ = os.Remove(tempPath)
 		return true, err
 	}
+	if info, err := os.Stat(realPath); err == nil {
+		// Do not transfer setuid/setgid bits to new contents without preserving ownership.
+		if err = os.Chmod(tempPath, info.Mode().Perm()); err != nil {
+			_ = os.Remove(tempPath)
+			return true, err
+		}
+	} else if !os.IsNotExist(err) {
+		_ = os.Remove(tempPath)
+		return true, err
+	}
 	if err := fileutils.MoveFile(tempPath, realPath); err != nil {
 		_ = os.Remove(tempPath)
 		return true, err
@@ -171,15 +161,19 @@ func isMissingPutTargetError(err error) bool {
 }

 // putResourceWithQuota writes PUT body bytes with upload-style quota reserve/commit on the destination path.
-func putResourceWithQuota(w http.ResponseWriter, r *http.Request, d *Context, sourceName, fullIndexPath string) (int, error) {
+// boundIndexPath limits symlink resolution to the caller's scope ("" or "/" = source root only).
+func putResourceWithQuota(w http.ResponseWriter, r *http.Request, d *Context, sourceName, boundIndexPath, fullIndexPath string) (int, error) {
 	idx := indexing.GetIndex(sourceName)
 	if idx == nil {
 		return http.StatusNotFound, fmt.Errorf("source not found")
 	}
-	realPath, err := resolvePutRealPath(idx, fullIndexPath)
+	realPath, err := idx.GetRealPathForMutation(boundIndexPath, fullIndexPath)
 	if err != nil {
 		return sanitizePutPathError(err)
 	}
+	if stat, statErr := os.Stat(realPath); statErr == nil && stat.IsDir() {
+		return http.StatusMethodNotAllowed, errPutPathIsDirectory
+	}

 	totalSize, hasTotalSize, err := parsePutTotalSize(r)
 	if err != nil {
@@ -320,3 +314,25 @@ func renderQuotaError(w http.ResponseWriter, r *http.Request, err error) (int, e
 	}
 	return status, nil
 }
+
+func prepareDeleteQuotaAdjustments(d *Context, sourceName, fullIndexPath string, fileInfo *iteminfo.ExtendedFileInfo) state.DeleteAdjustments {
+	sourceInfo, ok := settings.Config.Server.NameToSource[sourceName]
+	if !ok || fileInfo == nil {
+		return state.DeleteAdjustments{}
+	}
+	principal := quota.PrincipalForUpload(d.User, d.Share.UserID, d.Share.Hash)
+	isDir := fileInfo.Type == "directory"
+	var deleteBytes int64
+	if isDir {
+		deleteBytes, _ = state.IndexedPathBytes(sourceName, fullIndexPath, true)
+	} else {
+		deleteBytes = fileInfo.Size
+	}
+	return state.PrepareAccountedDelete(principal, sourceName, sourceInfo.Path, fullIndexPath, d.Share.Hash, isDir, deleteBytes)
+}
+
+func applyDeleteQuotaAdjustments(adj state.DeleteAdjustments) {
+	if err := state.ApplyAccountedDelete(adj); err != nil {
+		logger.Warningf("quota adjust after delete failed: %v", err)
+	}
+}
@@ -270,30 +270,25 @@ func resourceDeleteHandler(w http.ResponseWriter, r *http.Request, d *Context) (
 		return ErrToStatus(err), err
 	}

+	userScope, err := d.User.GetScopeForSourceName(source)
+	if err != nil {
+		return http.StatusForbidden, err
+	}
+	fullIndexPath := utils.JoinScopedIndexPath(userScope, path)
+
 	// delete thumbnails
 	preview.DelThumbs(r.Context(), *fileInfo)

-	principal := quota.PrincipalForUpload(d.User, d.Share.UserID, d.Share.Hash)
-	sourceInfo, ok := settings.Config.Server.NameToSource[source]
-	if !ok {
+	if _, ok := settings.Config.Server.NameToSource[source]; !ok {
 		return http.StatusNotFound, fmt.Errorf("source %s not found", source)
 	}
-	var deleteBytes int64
-	if fileInfo.Type == "directory" {
-		deleteBytes, _ = state.IndexedPathBytes(source, fileInfo.Path, true)
-	} else {
-		deleteBytes = fileInfo.Size
-	}

-	err = files.DeleteFiles(source, fileInfo.RealPath, fileInfo.Type == "directory")
+	adjustments := prepareDeleteQuotaAdjustments(d, source, fullIndexPath, fileInfo)
+	err = files.DeleteFiles(source, userScope, fullIndexPath, fileInfo.Type == "directory")
 	if err != nil {
 		return ErrToStatus(err), err
 	}
-	if deleteBytes > 0 {
-		if adjErr := state.ApplyAccountedUsageDelta(principal, source, sourceInfo.Path, fileInfo.Path, d.Share.Hash, -deleteBytes); adjErr != nil {
-			logger.Warningf("quota adjust after delete failed: %v", adjErr)
-		}
-	}
+	applyDeleteQuotaAdjustments(adjustments)
 	activity.RecordDelete(r, toActor(d), source, path)
 	return http.StatusOK, nil

@@ -312,12 +307,24 @@ func publicDeleteHandler(w http.ResponseWriter, r *http.Request, d *Context) (in
 	if err != nil {
 		return http.StatusNotFound, fmt.Errorf("resource not available")
 	}
-	err = files.DeleteFiles(d.Share.SourcePath, fileInfo.RealPath, fileInfo.Type == "directory")
+	userScope, err := d.ShareUser.GetScopeForSourceName(d.Share.SourcePath)
+	if err != nil {
+		return http.StatusForbidden, err
+	}
+	// d.IndexPath is scope-relative; rebuild full index paths for the bound and target.
+	shareRelPath := strings.TrimPrefix(d.Share.Path, userScope)
+	fullIndexPath := utils.JoinScopedIndexPath(userScope, d.IndexPath)
+	boundIndexPath := utils.JoinScopedIndexPath(userScope, shareRelPath)
+	sourceName := d.Share.GetSourceName()
+	adjustments := prepareDeleteQuotaAdjustments(d, sourceName, fullIndexPath, fileInfo)
+	err = files.DeleteFiles(d.Share.SourcePath, boundIndexPath, fullIndexPath, fileInfo.Type == "directory")
 	if err != nil {
 		logger.Errorf("public delete handler: error deleting resource with error %v", err)
 		return http.StatusInternalServerError, fmt.Errorf("an error occured while deleting the resource")
 	}
+	applyDeleteQuotaAdjustments(adjustments)
 	preview.DelThumbs(r.Context(), *fileInfo)
+	activity.RecordDelete(r, toActor(d), d.Share.GetSourceName(), fileInfo.Path)
 	return http.StatusOK, nil
 }

@@ -390,10 +397,12 @@ func ResourceBulkDeleteHandler(w http.ResponseWriter, r *http.Request, d *Contex
 		Succeeded: make([]BulkDeleteItem, 0),
 		Failed:    make([]BulkDeleteItem, 0),
 	}
+	activityItems := make([]activity.BulkDeleteItem, 0, len(items))

 	// Process each item one at a time
 	for _, item := range items {
 		rawPath := item.Path
+		activityPath := rawPath
 		// Validate item
 		if rawPath == "" {
 			response.Failed = append(response.Failed, BulkDeleteItem{
@@ -476,8 +485,12 @@ func ResourceBulkDeleteHandler(w http.ResponseWriter, r *http.Request, d *Contex
 				return http.StatusNotFound, fmt.Errorf("resource not available")
 			}

-			// Delete the file/directory
-			err = files.DeleteFiles(sourceName, fileInfo.RealPath, fileInfo.Type == "directory")
+			// indexPath is scope-relative; rebuild full index paths for the bound and target.
+			boundIndexPath := utils.JoinScopedIndexPath(userScope, withoutUserScope)
+			fullIndexPath := utils.JoinScopedIndexPath(userScope, indexPath)
+
+			adjustments := prepareDeleteQuotaAdjustments(d, sourceName, fullIndexPath, fileInfo)
+			err = files.DeleteFiles(sourceName, boundIndexPath, fullIndexPath, fileInfo.Type == "directory")
 			if err != nil {
 				logger.Errorf("resource bulk delete handler: error deleting file/directory: %v", err)
 				response.Failed = append(response.Failed, BulkDeleteItem{
@@ -487,8 +500,10 @@ func ResourceBulkDeleteHandler(w http.ResponseWriter, r *http.Request, d *Contex
 				})
 				continue
 			}
+			applyDeleteQuotaAdjustments(adjustments)
 			// Delete thumbnails
 			preview.DelThumbs(r.Context(), *fileInfo)
+			activityPath = fileInfo.Path
 		} else {
 			// Regular user context - validate source and check user scope
 			if item.Source == "" {
@@ -501,7 +516,7 @@ func ResourceBulkDeleteHandler(w http.ResponseWriter, r *http.Request, d *Contex
 			}

 			// Check user scope for this source
-			_, err := filePermUser.GetScopeForSourceName(item.Source)
+			userScope, err := filePermUser.GetScopeForSourceName(item.Source)
 			if err != nil {
 				response.Failed = append(response.Failed, BulkDeleteItem{
 					Source:  item.Source,
@@ -554,7 +569,9 @@ func ResourceBulkDeleteHandler(w http.ResponseWriter, r *http.Request, d *Contex
 				})
 				continue
 			}
-			err = files.DeleteFiles(item.Source, fileInfo.RealPath, fileInfo.Type == "directory")
+			fullIndexPath := utils.JoinScopedIndexPath(userScope, sanitizedPath)
+			adjustments := prepareDeleteQuotaAdjustments(d, item.Source, fullIndexPath, fileInfo)
+			err = files.DeleteFiles(item.Source, userScope, fullIndexPath, fileInfo.Type == "directory")
 			if err != nil {
 				response.Failed = append(response.Failed, BulkDeleteItem{
 					Source:  item.Source,
@@ -563,6 +580,7 @@ func ResourceBulkDeleteHandler(w http.ResponseWriter, r *http.Request, d *Contex
 				})
 				continue
 			}
+			applyDeleteQuotaAdjustments(adjustments)
 			preview.DelThumbs(r.Context(), *fileInfo)
 		}
 		// Success — echo the client path in the response
@@ -574,6 +592,7 @@ func ResourceBulkDeleteHandler(w http.ResponseWriter, r *http.Request, d *Contex
 			loggedItem.Source = d.Share.GetSourceName()
 		}
 		response.Succeeded = append(response.Succeeded, loggedItem)
+		activityItems = append(activityItems, activity.BulkDeleteItem{Source: loggedItem.Source, Path: activityPath})
 	}

 	// Determine status code based on results
@@ -582,8 +601,8 @@ func ResourceBulkDeleteHandler(w http.ResponseWriter, r *http.Request, d *Contex
 		statusCode = http.StatusMultiStatus
 	}

-	if len(response.Succeeded) > 0 {
-		activity.RecordBulkDelete(r, toActor(d), bulkDeleteActivityItems(response.Succeeded))
+	if len(activityItems) > 0 {
+		activity.RecordBulkDelete(r, toActor(d), activityItems)
 	}

 	return RenderJSON(w, r, response, statusCode)
@@ -746,8 +765,19 @@ func ResourcePostHandler(w http.ResponseWriter, r *http.Request, d *Context) (in

 	fullIndexPath := utils.JoinScopedIndexPath(userscope, path)

-	// get scoped path
-	realPath, _, _ := idx.GetRealPath(fullIndexPath)
+	// Resolve for mutation: symlink components must stay inside the share path
+	// for shares, or inside the user's scope otherwise — never unchecked. A
+	// not-yet-existing leaf resolves via its nearest existing ancestor.
+	mutationBound := userscope
+	if d.Share.Hash != "" && d.Share.Path != "" {
+		// d.Share.Path may be scope-relative or already scope-prefixed; normalize
+		// to a full index path so it can serve as the containment bound.
+		mutationBound = utils.JoinScopedIndexPath(userscope, strings.TrimPrefix(d.Share.Path, userscope))
+	}
+	realPath, err := idx.GetRealPathForMutation(mutationBound, fullIndexPath)
+	if err != nil {
+		return sanitizePutPathError(err)
+	}

 	if d.Share.Hash == "" {
 		filePerms, permErr := effectiveFilePerms(d, source)
@@ -787,7 +817,7 @@ func ResourcePostHandler(w http.ResponseWriter, r *http.Request, d *Context) (in
 		dirOpts := fileOpts
 		dirOpts.Path = fullIndexPath

-		err = files.WriteDirectory(dirOpts)
+		err = files.WriteDirectory(mutationBound, dirOpts)
 		if err != nil {
 			logger.Debugf("error writing directory: %v", err)
 			return ErrToStatus(err), err
@@ -848,12 +878,14 @@ func ResourcePostHandler(w http.ResponseWriter, r *http.Request, d *Context) (in
 			}
 		}()

-		// On the first chunk, check quota and conflicts
-		if offset == 0 {
+		// Reserve quota before writing any chunk (including resume at nonzero offset).
+		if !quotaReserved {
 			if quotaErr := checkUploadQuota(quotaCtx); quotaErr != nil {
 				return renderQuotaError(w, r, quotaErr)
 			}
 			quotaReserved = true
+		}
+		if offset == 0 {
 			// Check for file/folder conflicts for chunked uploads
 			if stat, statErr := os.Stat(realPath); statErr == nil {
 				existingIsDir := stat.IsDir()
@@ -1006,11 +1038,30 @@ func ResourcePostHandler(w http.ResponseWriter, r *http.Request, d *Context) (in
 	}

 	if !isContentUpload(r) {
-		err = files.WriteFile(fileOpts.Source, fullIndexPath, r.Body)
+		sessionID := newQuotaSessionID()
+		totalSize := r.ContentLength
+		hasSize := totalSize >= 0
+		quotaCtx := uploadQuotaContext(d, source, fullIndexPath, realPath, r, sessionID, totalSize, hasSize)
+		quotaReserved := false
+		defer func() {
+			if quotaReserved {
+				releaseUploadQuota(sessionID)
+			}
+		}()
+		if quotaErr := checkUploadQuota(quotaCtx); quotaErr != nil {
+			return renderQuotaError(w, r, quotaErr)
+		}
+		quotaReserved = true
+		err = files.WriteFile(fileOpts.Source, mutationBound, fullIndexPath, r.Body)
 		if err != nil {
 			logger.Debugf("error writing file: %v", err)
 			return ErrToStatus(err), err
 		}
+		if commitErr := commitUploadQuotaAfterMove(quotaCtx); commitErr != nil {
+			quotaReserved = false
+			return renderQuotaError(w, r, commitErr)
+		}
+		quotaReserved = false
 		activity.RecordUpload(r, toActor(d), source, path, false)
 		return http.StatusOK, nil
 	}
@@ -1100,6 +1151,7 @@ func ResourcePostHandler(w http.ResponseWriter, r *http.Request, d *Context) (in
 	}
 	quotaReserved = false
 	activity.RecordUpload(r, toActor(d), source, path, false)
+	activeUploadSessions.release(realPath, sessionID)
 	abandonSession = false
 	return http.StatusOK, nil
 }
@@ -1206,7 +1258,11 @@ func resourcePutHandler(w http.ResponseWriter, r *http.Request, d *Context) (int
 		return http.StatusMethodNotAllowed, errPutPathIsDirectory
 	}

-	return putResourceWithQuota(w, r, d, source, fullIndexPath)
+	status, err := putResourceWithQuota(w, r, d, source, userScope, fullIndexPath)
+	if err == nil && (status == http.StatusOK || status == 0) {
+		activity.RecordFileModify(r, toActor(d), source, path)
+	}
+	return status, err
 }

 // publicPutHandler handles the PUT request for a public share.
@@ -1247,7 +1303,11 @@ func publicPutHandler(w http.ResponseWriter, r *http.Request, d *Context) (int,
 	if idx.Config.ReadOnly {
 		return http.StatusForbidden, fmt.Errorf("source is read-only")
 	}
-	return putResourceWithQuota(w, r, d, sourceName, resolvedPath)
+	status, err := putResourceWithQuota(w, r, d, sourceName, d.Share.Path, resolvedPath)
+	if err == nil && (status == http.StatusOK || status == 0) {
+		activity.RecordFileModify(r, toActor(d), sourceName, resolvedPath)
+	}
+	return status, err
 }

 // resourcePatchHandler performs a patch operation (e.g., move, copy, rename) on resources.
@@ -1446,8 +1506,17 @@ func ResourcePatchHandler(w http.ResponseWriter, r *http.Request, d *Context) (i
 			continue
 		}

+		// Bound symlink resolution to the share path for shares or the user
+		// scope otherwise, so linked paths cannot escape the caller's scope.
+		boundSrc := userscopeSrc
+		boundDst := userscopeDst
+		if d.Share.Hash != "" {
+			boundSrc = d.Share.Path
+			boundDst = d.Share.Path
+		}
+
 		// Get real paths (fullSrcIndexPath already includes user scope)
-		realSrc, isSrcDir, err := srcIdx.GetRealPath(fullSrcIndexPath)
+		realSrc, isSrcDir, err := srcIdx.GetRealPathScoped(boundSrc, fullSrcIndexPath)
 		if err != nil {
 			logger.Errorf("could not resolve source path: %v, fromPath: %v", err, clientFromPath)
 			item.Message = "could not resolve source path"
@@ -1461,10 +1530,14 @@ func ResourcePatchHandler(w http.ResponseWriter, r *http.Request, d *Context) (i
 			continue
 		}

-		// Check destination parent directory exists
-		dstParentPath := filepath.Dir(cleanToPath)
-		fullDstParentPath := utils.JoinScopedIndexPath(userscopeDst, dstParentPath)
-		parentDir, _, err := dstIdx.GetRealPath(fullDstParentPath)
+		// Resolve the destination: copy must reject escaping symlink leaves; move/rename
+		// must replace an existing symlink entry without following it.
+		var realDest string
+		if req.Action == "copy" {
+			realDest, err = dstIdx.GetRealPathForMutation(boundDst, fullDstIndexPath)
+		} else {
+			realDest, err = dstIdx.GetRealPathForRemoval(boundDst, fullDstIndexPath)
+		}
 		if err != nil {
 			item.Message = "destination directory does not exist"
 			if d.Share.Hash != "" {
@@ -1476,7 +1549,6 @@ func ResourcePatchHandler(w http.ResponseWriter, r *http.Request, d *Context) (i
 			response.Failed = append(response.Failed, moveCopyWithClientPaths(item, clientFromPath, clientToPath))
 			continue
 		}
-		realDest := parentDir + "/" + filepath.Base(cleanToPath)

 		// Auto-rename if requested
 		if req.Rename {
@@ -1852,11 +1924,3 @@ func moveCopyWithClientPaths(item MoveCopyItem, clientFrom, clientTo string) Mov
 	item.ToPath = clientTo
 	return item
 }
-
-func bulkDeleteActivityItems(items []BulkDeleteItem) []activity.BulkDeleteItem {
-	out := make([]activity.BulkDeleteItem, len(items))
-	for i, it := range items {
-		out[i] = activity.BulkDeleteItem{Source: it.Source, Path: it.Path}
-	}
-	return out
-}
@@ -0,0 +1,186 @@
+package web
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/quota"
+	dbsql "github.com/gtsteffaniak/filebrowser/backend/internal/database/sql"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/preview"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+)
+
+// Use a database-backed index because deletion refreshes and removes metadata.
+func setupDeleteQuotaTest(t *testing.T) string {
+	t.Helper()
+	sourcePath := setupPutQuotaTest(t)
+	settings.Config.Http.BaseURL = "/"
+	fileutils.SetFsPermissions(0644, 0755)
+	oldDB := indexing.GetIndexDB()
+	settings.Config.Server.CacheDir = t.TempDir()
+	if err := os.MkdirAll(filepath.Join(settings.Config.Server.CacheDir, "sql"), 0755); err != nil {
+		t.Fatal(err)
+	}
+	db, _, err := dbsql.NewIndexDB("delete_quota", "OFF", 1000, 32, false)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() {
+		indexing.SetIndexDBForTesting(oldDB)
+		if err := db.Close(); err != nil {
+			t.Error(err)
+		}
+	})
+	indexing.SetIndexDBForTesting(db)
+	source := settings.Config.Server.NameToSource["Downloads"]
+	source.Config.UseLogicalSize = true
+	source.Config.ResolvedRules.IndexingDisabled = true
+	indexing.Initialize(source, true, false)
+	indexing.GetIndex("Downloads").Config.ResolvedRules.IndexingDisabled = false
+	return sourcePath
+}
+
+// seedNestedQuotaFixture writes files under scope, indexes them, and creates accounted
+// quotas on public/nested (5 bytes used) and sibling (7 bytes used).
+func seedNestedQuotaFixture(t *testing.T, sourcePath, scope string, user *users.User) (nested, sibling *quota.FolderQuota) {
+	t.Helper()
+	for path, content := range map[string]string{"public/direct": "123", "public/nested/file": "12345", "sibling/file": "1234567"} {
+		full := filepath.Join(sourcePath, scope, path)
+		if err := os.MkdirAll(filepath.Dir(full), 0755); err != nil {
+			t.Fatal(err)
+		}
+		if err := os.WriteFile(full, []byte(content), 0644); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := indexing.GetIndex("Downloads").RefreshDirectory("/", true); err != nil {
+		t.Fatal(err)
+	}
+	nested, err := state.CreateFolderQuota(sourcePath, utils.JoinPathAsUnix(scope, "/public/nested"), user.ID, 100, "accounted")
+	if err != nil {
+		t.Fatal(err)
+	}
+	sibling, err = state.CreateFolderQuota(sourcePath, utils.JoinPathAsUnix(scope, "/sibling"), user.ID, 100, "accounted")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for path, size := range map[string]int64{"/public/nested/file": 5, "/sibling/file": 7} {
+		if err = state.ApplyAccountedUsageDelta(user, "Downloads", sourcePath, utils.JoinPathAsUnix(scope, path), "", size); err != nil {
+			t.Fatal(err)
+		}
+	}
+	return nested, sibling
+}
+
+// The API path is relative to the user's scope while quota paths and the index are
+// source-relative, so the scoped case checks that the delete joins the scope.
+func TestResourceDeleteNestedQuota(t *testing.T) {
+	for _, scope := range []string{"/", "/scoped"} {
+		t.Run(scope, func(t *testing.T) {
+			sourcePath := setupDeleteQuotaTest(t)
+			if preview.GetService() == nil {
+				if err := preview.StartPreviewGenerator(1, t.TempDir()); err != nil {
+					t.Fatal(err)
+				}
+			}
+			user, err := state.GetUserByUsername("admin")
+			if err != nil {
+				t.Fatal(err)
+			}
+			user.BackendScopes[0].Scope = scope
+			nested, sibling := seedNestedQuotaFixture(t, sourcePath, scope, &user)
+			req := httptest.NewRequest(http.MethodDelete, "/api/resources?source=Downloads&path=/public", nil)
+			status, err := resourceDeleteHandler(httptest.NewRecorder(), req, &requestContext{User: &user})
+			if err != nil || status != http.StatusOK {
+				t.Fatalf("delete: status=%d err=%v", status, err)
+			}
+			if _, err := os.Stat(filepath.Join(sourcePath, scope, "public")); !os.IsNotExist(err) {
+				t.Fatalf("ancestor still exists: %v", err)
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(nested.ID); used != 0 {
+				t.Fatalf("nested usage=%d, want 0", used)
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(sibling.ID); used != 7 {
+				t.Fatalf("sibling usage=%d, want 7", used)
+			}
+		})
+	}
+}
+
+func TestResourceBulkDeleteNestedQuota(t *testing.T) {
+	for _, scope := range []string{"/", "/scoped"} {
+		t.Run(scope, func(t *testing.T) {
+			sourcePath := setupDeleteQuotaTest(t)
+			if preview.GetService() == nil {
+				if err := preview.StartPreviewGenerator(1, t.TempDir()); err != nil {
+					t.Fatal(err)
+				}
+			}
+			user, err := state.GetUserByUsername("admin")
+			if err != nil {
+				t.Fatal(err)
+			}
+			user.BackendScopes[0].Scope = scope
+			nested, sibling := seedNestedQuotaFixture(t, sourcePath, scope, &user)
+			body, err := json.Marshal([]BulkDeleteItem{{Source: "Downloads", Path: "/public"}})
+			if err != nil {
+				t.Fatal(err)
+			}
+			req := httptest.NewRequest(http.MethodDelete, "/api/resources/bulk", bytes.NewReader(body))
+			req.Header.Set("Content-Type", "application/json")
+			rec := httptest.NewRecorder()
+			status, err := ResourceBulkDeleteHandler(rec, req, &requestContext{User: &user})
+			if err != nil || status != http.StatusOK {
+				t.Fatalf("bulk delete: status=%d err=%v body=%s", status, err, rec.Body.String())
+			}
+			if _, err := os.Stat(filepath.Join(sourcePath, scope, "public")); !os.IsNotExist(err) {
+				t.Fatalf("ancestor still exists: %v", err)
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(nested.ID); used != 0 {
+				t.Fatalf("nested usage=%d, want 0", used)
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(sibling.ID); used != 7 {
+				t.Fatalf("sibling usage=%d, want 7", used)
+			}
+		})
+	}
+}
+
+func TestResourceBulkDeletePartialFailureKeepsQuota(t *testing.T) {
+	sourcePath := setupDeleteQuotaTest(t)
+	user, err := state.GetUserByUsername("admin")
+	if err != nil {
+		t.Fatal(err)
+	}
+	nested, sibling := seedNestedQuotaFixture(t, sourcePath, "/", &user)
+	body, err := json.Marshal([]BulkDeleteItem{
+		{Source: "Downloads", Path: "/no-such-path"},
+		{Source: "Downloads", Path: "/public"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := httptest.NewRequest(http.MethodDelete, "/api/resources/bulk", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	rec := httptest.NewRecorder()
+	status, err := ResourceBulkDeleteHandler(rec, req, &requestContext{User: &user})
+	if err != nil || status != http.StatusMultiStatus {
+		t.Fatalf("bulk delete: status=%d err=%v", status, err)
+	}
+	if used, _ := state.GetQuotaCounterSnapshot(nested.ID); used != 0 {
+		t.Fatalf("nested usage=%d, want 0 after successful item", used)
+	}
+	if used, _ := state.GetQuotaCounterSnapshot(sibling.ID); used != 7 {
+		t.Fatalf("sibling usage=%d, want 7", used)
+	}
+}
@@ -49,6 +49,11 @@ func setupUploadHTTPTest(t *testing.T) (root string, user *users.User) {
 	fileutils.SetFsPermissions(0o644, 0o755)

 	root = t.TempDir()
+	// Mutation helpers resolve symlinks; keep the source root in resolved form
+	// so expected paths match what the code produces (macOS /var -> /private/var).
+	if resolved, rerr := filepath.EvalSymlinks(root); rerr == nil {
+		root = resolved
+	}
 	sourceName := "uploads"
 	sourcePath := root

@@ -16,8 +16,8 @@ import (
 	_ "net/http/pprof"

 	"github.com/coreos/go-systemd/v22/activation"
-	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/files"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/auth"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/events"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
@@ -40,6 +40,8 @@ var (
 func initRuntime(deps Deps, assets fs.FS) {
 	runtimeDeps = deps
 	assetFs = assets
+	// Make the generated YAML's `secret:` markers available to the settings redactor.
+	initSettingsSecretMarkers()
 }

 // Embed the files in the frontend/dist directory
@@ -91,8 +93,9 @@ func StartHttp(ctx context.Context, deps Deps, shutdownComplete chan struct{}) {
 	configureHTTPRouter(router, api, publicRoutes, publicApi)

 	srv := &http.Server{
-		Addr:    settings.HTTPListenAddr(settings.Config.Http.ListenAddress, settings.Config.Http.Port),
-		Handler: muxWithMiddleware(router),
+		Addr:        settings.HTTPListenAddr(settings.Config.Http.ListenAddress, settings.Config.Http.Port),
+		Handler:     muxWithMiddleware(router),
+		ConnContext: settings.AttachConnContext,
 	}
 	listenAddress := settings.Config.Http.ListenAddress
 	go func() {
@@ -103,7 +106,7 @@ func StartHttp(ctx context.Context, deps Deps, shutdownComplete chan struct{}) {
 			if err = os.Remove(settings.Config.Http.Socket); err != nil && !os.IsNotExist(err) {
 				logger.Fatalf("Could not remove existing socket: %v", err)
 			}
-			listener, err = net.Listen("unix", settings.Config.Http.Socket)
+			listener, err = settings.ListenUnixFilesystem(settings.Config.Http.Socket)
 			if err != nil {
 				logger.Fatalf("Could not listen on unix socket: %v", err)
 			}
@@ -33,6 +33,19 @@ func readSettingsPatchBody(w http.ResponseWriter, r *http.Request) ([]byte, erro
 	return patchJSON, nil
 }

+// initSettingsSecretMarkers points the settings package at the generated YAML shipped in the
+// running binary's asset filesystem, so it can discover the `secret:` comment markers that
+// decide which config fields are redacted. The Go sources are absent in a deployed binary, so
+// this is the marker source that matters in production.
+func initSettingsSecretMarkers() {
+	if settings.SecretHintYaml != "" {
+		return
+	}
+	if embedded, err := readEmbeddedConfigYaml(); err == nil {
+		settings.SecretHintYaml = embedded
+	}
+}
+
 // settingsGetHandler retrieves the current system settings.
 // @Summary Get system settings
 // @Description Returns the current configuration settings for signup, user directories, rules, frontend.
@@ -44,6 +57,9 @@ func readSettingsPatchBody(w http.ResponseWriter, r *http.Request) ([]byte, erro
 // @Router /api/settings [get]
 func settingsGetHandler(w http.ResponseWriter, r *http.Request, d *Context) (int, error) {
 	property := r.URL.Query().Get("property")
+	if property == "auth" {
+		return RenderJSON(w, r, settings.RedactAuthSecrets(settings.Config.Auth))
+	}
 	if property != "" {
 		// get property by name
 		switch property {
@@ -51,8 +67,6 @@ func settingsGetHandler(w http.ResponseWriter, r *http.Request, d *Context) (int
 			return RenderJSON(w, r, state.GetDefaultUserDefaults())
 		case "frontend":
 			return RenderJSON(w, r, settings.Config.Frontend)
-		case "auth":
-			return RenderJSON(w, r, settings.Config.Auth)
 		case "server":
 			return RenderJSON(w, r, settings.Config.Server)
 		case "sources":
@@ -61,7 +75,26 @@ func settingsGetHandler(w http.ResponseWriter, r *http.Request, d *Context) (int
 			return http.StatusNotFound, nil
 		}
 	}
-	return RenderJSON(w, r, &settings.Config)
+	// Redact secrets (auth.key, totpSecret, adminPassword, OIDC clientSecret, LDAP/recaptcha
+	// secrets, ...) so the admin response never echoes plaintext credentials (GHSA-892f-9h5p-mfc8).
+	// RedactedSettingsCopy returns a copy: the live config keeps the real secrets, so auth and
+	// the OIDC/LDAP/OnlyOffice integrations keep working after this request.
+	return RenderJSON(w, r, settings.RedactedSettingsCopy(&settings.Config))
+}
+
+// readEmbeddedConfigYaml returns the config.generated.yaml shipped in the binary's asset
+// filesystem. It is the comment/secret-marker source for both the YAML export and the settings
+// JSON redactor.
+func readEmbeddedConfigYaml() (string, error) {
+	path := "config.generated.yaml"
+	if settings.Env.EmbeddedFs {
+		path = "embed/config.generated.yaml"
+	}
+	content, err := fs.ReadFile(assetFs, path)
+	if err != nil {
+		return "", err
+	}
+	return string(content), nil
 }

 // settingsConfigHandler returns the current system settings as YAML.
@@ -85,22 +118,12 @@ func settingsConfigHandler(w http.ResponseWriter, r *http.Request, d *Context) (
 	var err error
 	var yamlConfig string

-	// Try to read the generated YAML file for comments (should always exist)
-	var embeddedYaml []byte
-	var readErr error
-
-	if settings.Env.EmbeddedFs {
-		embeddedYaml, readErr = fs.ReadFile(assetFs, "embed/config.generated.yaml")
-	} else {
-		embeddedYaml, readErr = fs.ReadFile(assetFs, "config.generated.yaml")
-		if readErr != nil {
-			return http.StatusInternalServerError, fmt.Errorf("error reading generated YAML: %v", readErr)
-		}
-	}
+	// Comment/secret-marker source, shared with settingsGetHandler's redactor.
+	embeddedYaml, _ := readEmbeddedConfigYaml()

 	// If we successfully read the generated YAML, use it as the comment source
-	if readErr == nil && len(embeddedYaml) > 0 {
-		yamlConfig, err = settings.GenerateConfigYamlWithEmbedded(&settings.Config, showComments, showFull, false, string(embeddedYaml))
+	if embeddedYaml != "" {
+		yamlConfig, err = settings.GenerateConfigYamlWithEmbedded(&settings.Config, showComments, showFull, false, embeddedYaml)
 		if err != nil {
 			return http.StatusInternalServerError, fmt.Errorf("error generating YAML: %v", err)
 		}
@@ -0,0 +1,124 @@
+package web
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+)
+
+const settingsRedactSentinel = "SENTINEL-SETTINGS-SECRET"
+
+// TestSettingsGetHandler_redactsSecrets is the end-to-end regression guard for
+// GHSA-892f-9h5p-mfc8: GET /api/settings (and ?property=auth) must not return cleartext secrets.
+func TestSettingsGetHandler_redactsSecrets(t *testing.T) {
+	setupTestEnv(t)
+
+	prev := settings.Config
+	t.Cleanup(func() { settings.Config = prev })
+	settings.Config.Auth.Key = settingsRedactSentinel
+	settings.Config.Auth.TotpSecret = settingsRedactSentinel
+	settings.Config.Auth.Methods.PasswordAuth.AdminPassword = settingsRedactSentinel
+	settings.Config.Auth.Methods.PasswordAuth.Recaptcha.Secret = settingsRedactSentinel
+	settings.Config.Auth.Methods.OidcAuth.ClientSecret = settingsRedactSentinel
+	settings.Config.Auth.Methods.LdapAuth.UserPassword = settingsRedactSentinel
+	settings.Config.Auth.Methods.JwtAuth.Secret = settingsRedactSentinel
+	settings.Config.Integrations.OnlyOffice.Secret = settingsRedactSentinel
+
+	admin := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:    "settings_redact_admin",
+			Permissions: users.Permissions{Admin: true},
+		},
+	}
+
+	for _, path := range []string{"/api/settings", "/api/settings?property=auth"} {
+		t.Run(path, func(t *testing.T) {
+			req := httptest.NewRequest(http.MethodGet, path, nil)
+			rec := httptest.NewRecorder()
+
+			status, err := settingsGetHandler(rec, req, &Context{User: admin})
+			if status != http.StatusOK {
+				t.Fatalf("status=%d err=%v want 200", status, err)
+			}
+			body := rec.Body.String()
+			if strings.Contains(body, settingsRedactSentinel) {
+				t.Fatalf("response for %s leaked a plaintext secret: %s", path, body)
+			}
+			if !json.Valid([]byte(body)) {
+				t.Fatalf("response for %s is not valid JSON: %s", path, body)
+			}
+		})
+	}
+}
+
+// TestSettingsGetHandler_doesNotMutateLiveConfig is the regression guard for the live-config
+// mutation: the full settings request must redact only its response, never settings.Config,
+// otherwise JWT signing and the integrations break until the process restarts.
+func TestSettingsGetHandler_doesNotMutateLiveConfig(t *testing.T) {
+	setupTestEnv(t)
+
+	prev := settings.Config
+	t.Cleanup(func() { settings.Config = prev })
+	settings.Config.Auth.Key = settingsRedactSentinel
+
+	admin := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:    "settings_redact_admin3",
+			Permissions: users.Permissions{Admin: true},
+		},
+	}
+
+	req := httptest.NewRequest(http.MethodGet, "/api/settings", nil)
+	rec := httptest.NewRecorder()
+	status, err := settingsGetHandler(rec, req, &Context{User: admin})
+	if status != http.StatusOK {
+		t.Fatalf("status=%d err=%v want 200", status, err)
+	}
+	if strings.Contains(rec.Body.String(), settingsRedactSentinel) {
+		t.Fatal("response leaked a plaintext secret")
+	}
+	if settings.Config.Auth.Key != settingsRedactSentinel {
+		t.Fatalf("live config auth key was mutated by the settings response: %q", settings.Config.Auth.Key)
+	}
+}
+
+// TestSettingsGetHandler_redactsAuthKeyOnlyWherePresent confirms non-secret auth fields still
+// round-trip so the response stays usable for the UI.
+func TestSettingsGetHandler_keepsNonSecretAuthFields(t *testing.T) {
+	setupTestEnv(t)
+
+	prev := settings.Config
+	t.Cleanup(func() { settings.Config = prev })
+	settings.Config.Auth.Key = settingsRedactSentinel
+	settings.Config.Auth.TokenExpirationHours = 7
+
+	admin := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:    "settings_redact_admin2",
+			Permissions: users.Permissions{Admin: true},
+		},
+	}
+
+	req := httptest.NewRequest(http.MethodGet, "/api/settings?property=auth", nil)
+	rec := httptest.NewRecorder()
+	status, err := settingsGetHandler(rec, req, &Context{User: admin})
+	if status != http.StatusOK {
+		t.Fatalf("status=%d err=%v want 200", status, err)
+	}
+
+	var got settings.Auth
+	if err := json.Unmarshal(rec.Body.Bytes(), &got); err != nil {
+		t.Fatalf("unmarshal auth: %v", err)
+	}
+	if got.TokenExpirationHours != 7 {
+		t.Fatalf("tokenExpirationHours=%d want 7", got.TokenExpirationHours)
+	}
+	if got.Key == settingsRedactSentinel {
+		t.Fatal("auth key was returned in cleartext")
+	}
+}
@@ -0,0 +1,16 @@
+package web
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing"
+)
+
+func denyIfSourceReadOnly(sourceName string) (int, error) {
+	idx := indexing.GetIndex(sourceName)
+	if idx != nil && idx.Config.ReadOnly {
+		return http.StatusForbidden, fmt.Errorf("source is read-only")
+	}
+	return 0, nil
+}
@@ -0,0 +1,311 @@
+package web
+
+import (
+	"archive/zip"
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/files"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/indexing/iteminfo"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+)
+
+func setTestSourceReadOnly(sourceName string, readOnly bool) {
+	idx := indexing.GetIndex(sourceName)
+	if idx == nil {
+		return
+	}
+	idx.Config.ReadOnly = readOnly
+}
+
+func TestDenyIfSourceReadOnly(t *testing.T) {
+	t.Parallel()
+	indexing.SetTestIndex("ro-test", t.TempDir())
+	t.Cleanup(func() { indexing.ClearTestIndices() })
+
+	if status, err := denyIfSourceReadOnly("ro-test"); status != 0 || err != nil {
+		t.Fatalf("writable source: status=%d err=%v", status, err)
+	}
+
+	setTestSourceReadOnly("ro-test", true)
+	status, err := denyIfSourceReadOnly("ro-test")
+	if status != http.StatusForbidden || err == nil {
+		t.Fatalf("read-only source: status=%d err=%v", status, err)
+	}
+	if !strings.Contains(err.Error(), "read-only") {
+		t.Fatalf("error = %v", err)
+	}
+}
+
+func webDAVReadOnlyTestUser(source1Path string) *users.User {
+	user := &users.User{
+		ID: 1,
+		FrontendUser: users.FrontendUser{Username: "writer"},
+		BackendScopes: []users.BackendScope{
+			{Path: source1Path, Scope: "/"},
+		},
+		BackendSourcePermissions: webDAVPermsForPaths(true, true, true, true, source1Path),
+		Version:                  users.SourcePermissionsMigrationVersion,
+	}
+	applyBackendSourcePerms(user, user.BackendSourcePermissions)
+	return user
+}
+
+func callWebDAVHandler(t *testing.T, user *users.User, method, path string, body io.Reader, extra func(*http.Request)) (int, int) {
+	t.Helper()
+	req := httptest.NewRequest(method, "/dav/source1"+path, body)
+	req.SetPathValue("source", "source1")
+	req.SetPathValue("path", path)
+	if extra != nil {
+		extra(req)
+	}
+	w := httptest.NewRecorder()
+	status, err := webDAVHandler(w, req, &requestContext{User: user})
+	if status != 0 && status != http.StatusOK {
+		if w.Code == 0 || w.Code == http.StatusOK {
+			w.Code = status
+		}
+	}
+	if err != nil && status == 0 {
+		t.Fatalf("%s %s: %v", method, path, err)
+	}
+	return w.Code, status
+}
+
+func TestWebDAVReadOnlySourceEnforcement(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	user := webDAVReadOnlyTestUser(source1Path)
+
+	t.Run("read-only", func(t *testing.T) {
+		setTestSourceReadOnly("source1", true)
+		t.Cleanup(func() { setTestSourceReadOnly("source1", false) })
+
+		writeCases := []struct {
+			method string
+			path   string
+			setup  func(*http.Request)
+		}{
+			{method: "MKCOL", path: "/public/rodir"},
+			{method: http.MethodPut, path: "/public/ro-new.txt"},
+			{method: http.MethodDelete, path: "/public/readme.txt"},
+			{
+				method: "COPY",
+				path:   "/public/readme.txt",
+				setup: func(r *http.Request) {
+					r.Header.Set("Destination", "/dav/source1/public/readme-copy.txt")
+				},
+			},
+			{
+				method: "MOVE",
+				path:   "/public/readme.txt",
+				setup: func(r *http.Request) {
+					r.Header.Set("Destination", "/dav/source1/public/readme-moved.txt")
+				},
+			},
+		}
+		for _, tc := range writeCases {
+			t.Run(tc.method, func(t *testing.T) {
+				var body io.Reader
+				if tc.method == http.MethodPut {
+					body = strings.NewReader("data")
+				}
+				code, _ := callWebDAVHandler(t, user, tc.method, tc.path, body, tc.setup)
+				if code != http.StatusForbidden {
+					t.Fatalf("expected 403, got %d", code)
+				}
+			})
+		}
+
+		for _, tc := range []struct {
+			method string
+			path   string
+		}{
+			{method: "PROPFIND", path: "/public"},
+			{method: http.MethodGet, path: "/public/readme.txt"},
+		} {
+			t.Run(tc.method+"_allowed", func(t *testing.T) {
+				code, _ := callWebDAVHandler(t, user, tc.method, tc.path, nil, nil)
+				if code == http.StatusForbidden {
+					t.Fatalf("%s should not be forbidden on read-only source", tc.method)
+				}
+			})
+		}
+	})
+
+	t.Run("writable", func(t *testing.T) {
+		setTestSourceReadOnly("source1", false)
+		code, _ := callWebDAVHandler(t, user, http.MethodPut, "/public/writable-new.txt", strings.NewReader("ok"), nil)
+		if code != http.StatusCreated {
+			t.Fatalf("PUT on writable source: expected 201, got %d", code)
+		}
+	})
+}
+
+func TestUnarchivePreviewAllowsReadOnlyDestination(t *testing.T) {
+	root, user := setupUploadHTTPTest(t)
+	setTestSourceReadOnly("uploads", true)
+
+	archivePath := filepath.Join(root, "test.zip")
+	f, err := os.Create(archivePath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	zw := zip.NewWriter(f)
+	w, err := zw.Create("file.txt")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err = w.Write([]byte("hello")); err != nil {
+		t.Fatal(err)
+	}
+	if err = zw.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err = f.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	body := `{"fromSource":"uploads","path":"/test.zip","destination":"/","preview":true}`
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/resources/unarchive", strings.NewReader(body))
+	status, err := unarchiveHandler(rec, req, &Context{User: user})
+	if err != nil || status != http.StatusOK {
+		t.Fatalf("preview on read-only dest: status=%d err=%v body=%s", status, err, rec.Body.String())
+	}
+}
+
+func TestUnarchiveExtractionDeniedOnReadOnlyDestination(t *testing.T) {
+	root, user := setupUploadHTTPTest(t)
+	setTestSourceReadOnly("uploads", true)
+
+	archivePath := filepath.Join(root, "test.zip")
+	f, err := os.Create(archivePath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	zw := zip.NewWriter(f)
+	w, err := zw.Create("file.txt")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err = w.Write([]byte("hello")); err != nil {
+		t.Fatal(err)
+	}
+	if err = zw.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err = f.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	body := `{"fromSource":"uploads","path":"/test.zip","destination":"/","preview":false}`
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/resources/unarchive", strings.NewReader(body))
+	status, err := unarchiveHandler(rec, req, &Context{User: user})
+	if status != http.StatusForbidden || err == nil {
+		t.Fatalf("extract on read-only dest: status=%d err=%v", status, err)
+	}
+}
+
+func TestOnlyOfficeCallbackDeniedOnReadOnlySource(t *testing.T) {
+	initStreamTestSources(t)
+	indexing.SetTestIndex("default", "/default")
+	t.Cleanup(func() { indexing.ClearTestIndices() })
+	setTestSourceReadOnly("default", true)
+
+	const realPath = "/default/doc.docx"
+	const docKey = "oo-ro-key"
+	origFileInfo := files.FileInfoFasterFunc
+	t.Cleanup(func() { files.FileInfoFasterFunc = origFileInfo })
+	files.FileInfoFasterFunc = func(utils.FileOptions, *users.User) (*iteminfo.ExtendedFileInfo, error) {
+		return &iteminfo.ExtendedFileInfo{RealPath: realPath}, nil
+	}
+	utils.OnlyOfficeCache.Set(realPath, docKey)
+	t.Cleanup(func() { utils.OnlyOfficeCache.Delete(realPath) })
+
+	origOnlyOffice := settings.Config.Integrations.OnlyOffice
+	t.Cleanup(func() { settings.Config.Integrations.OnlyOffice = origOnlyOffice })
+	settings.Config.Integrations.OnlyOffice.Url = "http://onlyoffice.test"
+
+	user := testUserWithSourcePerms("/default", users.SourceFilePermissions{
+		View: true, Download: true, Modify: true,
+	})
+	d := &requestContext{User: user}
+	callback := &OnlyOfficeCallback{
+		Key:    docKey,
+		Status: onlyOfficeStatusDocumentClosedWithChanges,
+		URL:    "http://onlyoffice.test/cache/doc.docx",
+	}
+	req := httptest.NewRequest(http.MethodPost, "/api/office/callback?source=default&path=/doc.docx", nil)
+	rec := httptest.NewRecorder()
+	if _, err := processOnlyOfficeCallback(rec, req, d, callback); err != nil {
+		t.Fatalf("processOnlyOfficeCallback: %v", err)
+	}
+	if rec.Code != http.StatusForbidden {
+		t.Fatalf("status = %d, want %d body=%s", rec.Code, http.StatusForbidden, rec.Body.String())
+	}
+}
+
+func TestArchiveCreateDeniedOnReadOnlySource(t *testing.T) {
+	root, user := setupUploadHTTPTest(t)
+	setTestSourceReadOnly("uploads", true)
+	if err := os.WriteFile(filepath.Join(root, "a.txt"), []byte("x"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	body := `{"fromSource":"uploads","paths":["/a.txt"],"destination":"/out.zip","format":"zip"}`
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/resources/archive", strings.NewReader(body))
+	status, err := archiveCreateHandler(rec, req, &Context{User: user})
+	if status != http.StatusForbidden || err == nil {
+		t.Fatalf("archive create on read-only: status=%d err=%v", status, err)
+	}
+}
+
+func TestUnarchivePreviewSkipsReadOnlyDeleteAfterOnSource(t *testing.T) {
+	root, user := setupUploadHTTPTest(t)
+	setTestSourceReadOnly("uploads", true)
+
+	archivePath := filepath.Join(root, "test.zip")
+	f, err := os.Create(archivePath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	zw := zip.NewWriter(f)
+	w, err := zw.Create("file.txt")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err = w.Write([]byte("hello")); err != nil {
+		t.Fatal(err)
+	}
+	if err = zw.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err = f.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	body := `{"fromSource":"uploads","path":"/test.zip","destination":"/","preview":true,"deleteAfter":true}`
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/resources/unarchive", strings.NewReader(body))
+	status, err := unarchiveHandler(rec, req, &Context{User: user})
+	if err != nil || status != http.StatusOK {
+		t.Fatalf("preview with deleteAfter on read-only source: status=%d err=%v", status, err)
+	}
+	var preview json.RawMessage
+	if err = json.Unmarshal(rec.Body.Bytes(), &preview); err != nil {
+		t.Fatal(err)
+	}
+	if _, err = os.Stat(archivePath); err != nil {
+		t.Fatal("archive should remain when preview does not delete")
+	}
+}
@@ -273,6 +273,7 @@ func handleWithStaticData(w http.ResponseWriter, r *http.Request, d *requestCont
 		"searchResultsLimit":     settings.Config.Server.SearchResultsLimit,
 		"disableExternal":        settings.Config.Frontend.DisableDefaultLinks,
 		"darkMode":               settings.Config.UserDefaults.UI.DarkMode,
+		"singleClick":            settings.Config.UserDefaults.Listing.SingleClick,
 		"lightBackground":        settings.Config.Frontend.Styling.LightBackground,
 		"darkBackground":         settings.Config.Frontend.Styling.DarkBackground,
 		"baseURL":                settings.Config.Http.BaseURL,
@@ -8,6 +8,7 @@ import (
 	"mime"
 	"net/http"
 	"os"
+	"path"
 	"path/filepath"
 	"strconv"
 	"strings"
@@ -72,13 +73,15 @@ func normalizeViewGrantPath(p string) string {

 // shareRelativeDisplayName returns the client-facing filename for a path within a share.
 // Single-file shares use file=/ at the share root; the real name comes from the share path.
+// Both paths are slash-separated, so use path.Base: on Windows filepath.Base("/")
+// returns "\", which would skip the share-name fallback below.
 func shareRelativeDisplayName(d *Context, shareRelativePath string) string {
-	name := filepath.Base(normalizeViewGrantPath(shareRelativePath))
+	name := path.Base(normalizeViewGrantPath(shareRelativePath))
 	if name != "" && name != "." && name != "/" {
 		return name
 	}
 	if d != nil && d.Share.Hash != "" {
-		if shareName := filepath.Base(d.Share.Path); shareName != "" && shareName != "." && shareName != "/" {
+		if shareName := path.Base(normalizeViewGrantPath(d.Share.Path)); shareName != "" && shareName != "." && shareName != "/" {
 			return shareName
 		}
 	}
@@ -232,7 +235,10 @@ func ValidateViewGrant(token string, d *Context, sourceName string) error {
 		utils.ViewGrantsCache.Delete(token)
 		return fmt.Errorf("view token expired")
 	}
-	viewCtx := contextForViewGrantValidation(d, grant.Source)
+	viewCtx := d
+	if d.Share.Hash == "" && (sourceName == "" || grant.Source != sourceName) {
+		return fmt.Errorf("view token scope mismatch")
+	}
 	if !viewGrantScopeMatches(viewCtx, grant.Source, sourceName) {
 		return fmt.Errorf("view token scope mismatch")
 	}
@@ -253,33 +259,6 @@ func ValidateViewGrant(token string, d *Context, sourceName string) error {
 	return nil
 }

-// contextForViewGrantValidation hydrates share metadata when optional-auth middleware
-// left only a hash stub on the context (anonymous public share visitors).
-func contextForViewGrantValidation(d *Context, grantSource string) *Context {
-	if d == nil {
-		return d
-	}
-	if d.Share.Hash != "" {
-		return d
-	}
-	hash := strings.TrimSpace(grantSource)
-	if hash == "" {
-		return d
-	}
-	link, err := state.GetShare(hash)
-	if err != nil || link.Hash == "" {
-		return d
-	}
-	out := *d
-	out.Share = link
-	if out.ShareUser == nil {
-		if u, err := state.UserForShareOwner(link); err == nil {
-			out.ShareUser = &u
-		}
-	}
-	return &out
-}
-
 func viewGrantScopeMatches(d *Context, grantSource, sourceName string) bool {
 	expected := viewGrantScope(d, sourceName)
 	if grantSource == expected {
@@ -197,7 +197,7 @@ func TestValidateViewGrantShareBinding(t *testing.T) {
 	}
 	t.Cleanup(func() { settings.Config.Server.SourceMap = nil })
 	d := &requestContext{
-		User:  testUserWithView(1, "srv"),
+		User: testUserWithView(1, "srv"),
 		Share: share.Share{
 			ShareColumns: share.ShareColumns{Hash: "abc123"},
 			SourcePath:   "/srv",
@@ -215,7 +215,7 @@ func TestValidateViewGrantShareBinding(t *testing.T) {
 		t.Fatalf("ValidateViewGrant: %v", err)
 	}
 	wrongShare := &requestContext{
-		User:  testUserWithView(1, "srv"),
+		User: testUserWithView(1, "srv"),
 		Share: share.Share{
 			ShareColumns: share.ShareColumns{Hash: "other"},
 			SourcePath:   "/srv",
@@ -226,6 +226,39 @@ func TestValidateViewGrantShareBinding(t *testing.T) {
 	}
 }

+func TestValidateViewGrantRejectsShareTokenOnAuthenticatedRoute(t *testing.T) {
+	initStreamTestSources(t)
+	settings.Config.Server.SourceMap = map[string]*settings.Source{
+		"/srv": {Path: "/srv", Name: "srv"},
+	}
+	t.Cleanup(func() { settings.Config.Server.SourceMap = nil })
+
+	shareCtx := &requestContext{
+		User:  testUserWithView(1, "srv"),
+		Share: share.Share{ShareColumns: share.ShareColumns{Hash: "abc123"}, SourcePath: "/srv"},
+	}
+	token, err := mintViewGrant(shareCtx, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	denied := &requestContext{
+		User: &users.User{
+			FrontendUser: users.FrontendUser{Username: "bob"},
+			ID:           2,
+			BackendScopes: []users.BackendScope{
+				{Path: "/srv", Scope: "/", Permissions: users.DenyAllSourceFilePermissions()},
+			},
+			BackendSourcePermissions: map[string]users.SourceFilePermissions{
+				"/srv": users.DenyAllSourceFilePermissions(),
+			},
+			Version: users.SourcePermissionsMigrationVersion,
+		},
+	}
+	if err := ValidateViewGrant(token, denied, "srv"); err == nil {
+		t.Fatal("expected share view token to be rejected on authenticated view route")
+	}
+}
+
 func TestAttachViewTokenForAllFileTypes(t *testing.T) {
 	t.Parallel()
 	initStreamTestSources(t)
@@ -34,6 +34,29 @@ func createTokenAuthUser(t *testing.T, username string, perms users.Permissions)
 	return &reloaded
 }

+// registerApiToken mints a named API token for user, stores its metadata, and
+// registers its hash so auth can resolve it. configure, when non-nil, may adjust
+// the metadata before it is persisted.
+func registerApiToken(t *testing.T, user *users.User, name string, caps users.Permissions, minimal bool, configure func(*users.AuthToken)) string {
+	t.Helper()
+	tokenString, tokenMeta, err := auth.MakeSignedTokenAPI(user, name, time.Hour, caps, minimal)
+	if err != nil {
+		t.Fatal(err)
+	}
+	tokenMeta.Name = name
+	tokenMeta.Token = tokenString
+	if configure != nil {
+		configure(&tokenMeta)
+	}
+	if err = state.AddUserToken(user.Username, tokenMeta); err != nil {
+		t.Fatal(err)
+	}
+	if err = state.AddApiToken(tokenString, user.ID); err != nil {
+		t.Fatal(err)
+	}
+	return tokenString
+}
+
 func cookieRequest(t *testing.T, handler http.HandlerFunc, token string) *httptest.ResponseRecorder {
 	t.Helper()
 	rec := httptest.NewRecorder()
@@ -67,6 +90,53 @@ func TestApiTokenWithoutMetadataRejected(t *testing.T) {
 	}
 }

+func TestApiTokenMinimalKeepsOwnerPermissions(t *testing.T) {
+	setupTestEnv(t)
+	originalAuthKey := settings.Config.Auth.Key
+	settings.Config.Auth.Key = "key"
+	t.Cleanup(func() { settings.Config.Auth.Key = originalAuthKey })
+
+	user := createTokenAuthUser(t, "minimal-admin", users.Permissions{Admin: true, Api: true})
+	tokenString := registerApiToken(t, user, "minimal-key", users.Permissions{}, true, nil)
+
+	rec := cookieRequest(t, withAdmin(mockHandler), tokenString)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("minimal API token: got status %d, want %d", rec.Code, http.StatusOK)
+	}
+}
+
+func TestApiTokenCustomizedZeroPermissionsForbiddenOnAdmin(t *testing.T) {
+	setupTestEnv(t)
+	originalAuthKey := settings.Config.Auth.Key
+	settings.Config.Auth.Key = "key"
+	t.Cleanup(func() { settings.Config.Auth.Key = originalAuthKey })
+
+	user := createTokenAuthUser(t, "custom-zero-admin", users.Permissions{Admin: true, Api: true})
+	tokenString := registerApiToken(t, user, "zero-key", users.Permissions{}, false, nil)
+
+	rec := cookieRequest(t, withAdmin(mockHandler), tokenString)
+	if rec.Code != http.StatusForbidden {
+		t.Fatalf("customized zero-cap API token: got status %d, want %d", rec.Code, http.StatusForbidden)
+	}
+}
+
+func TestApiTokenLegacyEmptyCapsTreatedAsMinimal(t *testing.T) {
+	setupTestEnv(t)
+	originalAuthKey := settings.Config.Auth.Key
+	settings.Config.Auth.Key = "key"
+	t.Cleanup(func() { settings.Config.Auth.Key = originalAuthKey })
+
+	user := createTokenAuthUser(t, "legacy-minimal-admin", users.Permissions{Admin: true, Api: true})
+	tokenString := registerApiToken(t, user, "legacy-key", users.Permissions{}, true, func(meta *users.AuthToken) {
+		meta.Minimal = nil
+	})
+
+	rec := cookieRequest(t, withAdmin(mockHandler), tokenString)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("legacy empty-cap API token: got status %d, want %d", rec.Code, http.StatusOK)
+	}
+}
+
 // A named API token with stored caps must have those caps applied at auth time.
 func TestApiTokenCapsAppliedFromStoredMetadata(t *testing.T) {
 	setupTestEnv(t)
@@ -77,18 +147,7 @@ func TestApiTokenCapsAppliedFromStoredMetadata(t *testing.T) {
 	user := createTokenAuthUser(t, "capped-admin", users.Permissions{Admin: true, Api: true})

 	// The token cap excludes admin, so the resolved user must lose admin.
-	tokenString, tokenMeta, err := auth.MakeSignedTokenAPI(user, "capped-key", time.Hour, users.Permissions{Share: true}, false)
-	if err != nil {
-		t.Fatal(err)
-	}
-	tokenMeta.Name = "capped-key"
-	tokenMeta.Token = tokenString
-	if err := state.AddUserToken(user.Username, tokenMeta); err != nil {
-		t.Fatal(err)
-	}
-	if err := state.AddApiToken(tokenString, user.ID); err != nil {
-		t.Fatal(err)
-	}
+	tokenString := registerApiToken(t, user, "capped-key", users.Permissions{Share: true}, false, nil)

 	rec := cookieRequest(t, withAdmin(mockHandler), tokenString)
 	if rec.Code != http.StatusForbidden {
@@ -228,18 +287,7 @@ func TestApiTokenBasicAuthRoundTrip(t *testing.T) {
 	t.Cleanup(func() { settings.Config.Auth.Key = originalAuthKey })

 	user := createTokenAuthUser(t, "webdav-user", users.Permissions{Api: true})
-	tokenString, tokenMeta, err := auth.MakeSignedTokenAPI(user, "obsidian-sync", time.Hour, users.Permissions{}, true)
-	if err != nil {
-		t.Fatal(err)
-	}
-	tokenMeta.Name = "obsidian-sync"
-	tokenMeta.Token = tokenString
-	if err = state.AddUserToken(user.Username, tokenMeta); err != nil {
-		t.Fatal(err)
-	}
-	if err = state.AddApiToken(tokenString, user.ID); err != nil {
-		t.Fatal(err)
-	}
+	tokenString := registerApiToken(t, user, "obsidian-sync", users.Permissions{}, true, nil)

 	basicRequest := func(token string) *httptest.ResponseRecorder {
 		rec := httptest.NewRecorder()
@@ -283,6 +283,9 @@ func validateNonAdminSelfPatchWhich(which []string) error {
 		if f == "" {
 			return fmt.Errorf("which must not contain empty field names")
 		}
+		if strings.EqualFold(f, "PasskeyCredentials") {
+			return fmt.Errorf("passkeys can only be managed through the passkey registration endpoints")
+		}
 		if strings.EqualFold(f, "Password") || strings.EqualFold(f, "OtpEnabled") {
 			continue
 		}
@@ -305,7 +308,7 @@ func userPutOnlyNonAdminEditableFields(which []string) bool {
 		if f == "" {
 			return false
 		}
-		if strings.EqualFold(f, "Password") {
+		if strings.EqualFold(f, "Password") || strings.EqualFold(f, "PasskeyCredentials") {
 			return false
 		}
 		if _, ok := allowed[f]; !ok {
@@ -403,6 +406,9 @@ func userPatchHandler(w http.ResponseWriter, r *http.Request, d *Context) (int,
 	if err2 != nil {
 		return http.StatusInternalServerError, err2
 	}
+	if !d.User.Permissions.Admin && uValue.LockPassword && state.FieldListIncludes(req.Which, "password") {
+		return http.StatusForbidden, fmt.Errorf("password changes are disabled for this user")
+	}
 	req.User.ID = uValue.ID
 	req.User.Username = uValue.Username
 	if state.FieldListIncludes(req.Which, "otpEnabled") && !req.User.OtpEnabled {
@@ -0,0 +1,85 @@
+package web
+
+import (
+	"bytes"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
+)
+
+func TestUserPatchLockPassword(t *testing.T) {
+	setupTestEnv(t)
+
+	admin := &users.User{
+		ID: 1,
+		FrontendUser: users.FrontendUser{
+			Username:    "admin",
+			LoginMethod: users.LoginMethodOidc,
+			Permissions: users.Permissions{Admin: true},
+		},
+	}
+	if err := state.CreateUser(admin, ""); err != nil {
+		t.Fatal(err)
+	}
+	admin.Permissions = users.Permissions{Admin: true}
+	if err := state.UpdateUser(admin, "", "permissions"); err != nil {
+		t.Fatal(err)
+	}
+
+	locked := &users.User{
+		FrontendUser: users.FrontendUser{
+			Username:    "locked",
+			LoginMethod: users.LoginMethodPassword,
+		},
+	}
+	if err := state.CreateUser(locked, "oldpassword"); err != nil {
+		t.Fatal(err)
+	}
+	locked.LockPassword = true
+	if err := state.UpdateUser(locked, "", "lockPassword"); err != nil {
+		t.Fatal(err)
+	}
+	locked, err := getUser(t, "locked")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !locked.LockPassword {
+		t.Fatal("lockPassword was not stored")
+	}
+	oldHash := locked.Password
+
+	patch := func(actor *users.User) int {
+		body := []byte(`{"which":["password"],"data":{"password":"newpassword"}}`)
+		req := httptest.NewRequest(http.MethodPatch, "/api/users?username=locked", bytes.NewReader(body))
+		req.Header.Set("X-Password", "oldpassword")
+		status, _ := userPatchHandler(httptest.NewRecorder(), req, &Context{User: actor})
+		return status
+	}
+
+	if status := patch(locked); status != http.StatusForbidden {
+		t.Fatalf("self password change with lockPassword: status=%d, want %d", status, http.StatusForbidden)
+	}
+	after, err := getUser(t, "locked")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if after.Password != oldHash {
+		t.Fatal("password changed despite lockPassword")
+	}
+
+	if status := patch(admin); status != http.StatusNoContent {
+		t.Fatalf("admin password reset of locked user: status=%d, want %d", status, http.StatusNoContent)
+	}
+}
+
+func getUser(t *testing.T, username string) (*users.User, error) {
+	t.Helper()
+	u, err := state.GetUserByUsername(username)
+	if err != nil {
+		return nil, err
+	}
+	return &u, nil
+}
@@ -80,6 +80,12 @@ func TestValidateNonAdminSelfPatchWhich(t *testing.T) {
 		}
 	})

+	t.Run("rejects passkey credentials field", func(t *testing.T) {
+		if err := validateNonAdminSelfPatchWhich([]string{"passkeyCredentials"}); err == nil {
+			t.Fatal("expected error for passkeyCredentials")
+		}
+	})
+
 	t.Run("rejects privileged fields", func(t *testing.T) {
 		for _, which := range [][]string{
 			{"scopes"},
@@ -0,0 +1,54 @@
+package web
+
+import (
+	"bytes"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
+	"github.com/gtsteffaniak/filebrowser/backend/pkg/settings"
+)
+
+func TestUsersPostPartialGlobalPermissions(t *testing.T) {
+	setupTestEnv(t)
+
+	settings.Config.UserDefaults.Account.Permissions.Share = true
+	settings.Config.UserDefaults.Account.Permissions.Api = true
+	settings.Config.UserDefaults.Account.Permissions.Realtime = true
+	state.SetEffectiveUserDefaultsForTest(t, settings.Config.UserDefaults)
+
+	admin := &users.User{
+		ID: 1,
+		FrontendUser: users.FrontendUser{
+			Username:    "admin",
+			LoginMethod: users.LoginMethodOidc,
+			Permissions: users.Permissions{Admin: true},
+		},
+	}
+	if err := state.CreateUser(admin, ""); err != nil {
+		t.Fatal(err)
+	}
+	admin.Permissions = users.Permissions{Admin: true}
+	if err := state.UpdateUser(admin, "", "permissions"); err != nil {
+		t.Fatal(err)
+	}
+
+	body := []byte(`{"data":{"username":"newbie","password":"secret","loginMethod":"password","permissions":{"admin":true}}}`)
+	req := httptest.NewRequest(http.MethodPost, "/api/users", bytes.NewReader(body))
+	rec := httptest.NewRecorder()
+	status, err := usersPostHandler(rec, req, &Context{User: admin})
+	if err != nil || status != http.StatusCreated {
+		t.Fatalf("usersPostHandler() status=%d err=%v", status, err)
+	}
+
+	created, err := state.GetUserByUsername("newbie")
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := users.Permissions{Admin: true, Share: true, Api: true, Realtime: true}
+	if created.Permissions != want {
+		t.Fatalf("permissions = %+v, want %+v", created.Permissions, want)
+	}
+}
@@ -11,6 +11,7 @@ import (
 	"github.com/gtsteffaniak/filebrowser/backend/internal/activity"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/auth"
 	activitydb "github.com/gtsteffaniak/filebrowser/backend/internal/database/activity"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/errors"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
 )
@@ -110,6 +111,11 @@ func beginPasskeyRegistrationHandler(w http.ResponseWriter, r *http.Request, d *
 	if !auth.IsWebAuthnEnabled() {
 		return http.StatusForbidden, errors.ErrPasskeyNotEnabled
 	}
+	if d.User.LoginMethod == users.LoginMethodPassword && d.User.HasPasskeyMFA() {
+		if err := checkOtpActorPassword(r, d, d.User.Username); err != nil {
+			return http.StatusUnauthorized, err
+		}
+	}

 	registerRequestOrigin(r)

@@ -144,6 +150,11 @@ func finishPasskeyRegistrationHandler(w http.ResponseWriter, r *http.Request, d
 	if !auth.IsWebAuthnEnabled() {
 		return http.StatusForbidden, errors.ErrPasskeyNotEnabled
 	}
+	if d.User.LoginMethod == users.LoginMethodPassword && d.User.HasPasskeyMFA() {
+		if err := checkOtpActorPassword(r, d, d.User.Username); err != nil {
+			return http.StatusUnauthorized, err
+		}
+	}

 	registerRequestOrigin(r)

@@ -188,6 +199,11 @@ func deletePasskeyCredentialHandler(w http.ResponseWriter, r *http.Request, d *C
 	if !auth.IsWebAuthnEnabled() {
 		return http.StatusForbidden, errors.ErrPasskeyNotEnabled
 	}
+	if d.User.LoginMethod == users.LoginMethodPassword {
+		if err := checkOtpActorPassword(r, d, d.User.Username); err != nil {
+			return http.StatusUnauthorized, err
+		}
+	}

 	credentialID := r.PathValue("id")
 	if credentialID == "" {
@@ -56,6 +56,9 @@ type filteredFileSystem struct {
 	user      *users.User
 	filePerms users.SourceFilePermissions
 	httpReq   *http.Request
+	// skipRenameActivityFrom suppresses the move record for the hidden staging file a chunked
+	// upload is assembled under; the upload is recorded once against the real destination.
+	skipRenameActivityFrom string
 	// Cache FileInfoFaster results per path to avoid redundant calls within the same request
 	fileInfoCache map[string]*iteminfo.ExtendedFileInfo
 }
@@ -208,6 +211,52 @@ func (ffs *filteredFileSystem) checkAccess(requestPath string) error {
 	return nil
 }

+// checkScopePath verifies that a WebDAV request path cannot traverse a symlink
+// resolving outside the user's scope. Write targets may not exist yet (the
+// deepest existing ancestor is resolved); forRemoval keeps the leaf unresolved
+// so a symlink entry is removed rather than followed. Returns os.ErrPermission
+// on scope escapes.
+func (ffs *filteredFileSystem) checkScopePath(requestPath string, forRemoval bool) error {
+	idx := indexing.GetIndex(ffs.source)
+	if idx == nil {
+		return fmt.Errorf("source not found")
+	}
+	userScope, err := ffs.user.GetScopeForSourceName(ffs.source)
+	if err != nil {
+		return err
+	}
+	fullIndexPath := utils.JoinScopedIndexPath(userScope, strings.TrimPrefix(requestPath, "/"))
+	if forRemoval {
+		_, err = idx.GetRealPathForRemoval(userScope, fullIndexPath)
+	} else {
+		_, err = idx.GetRealPathForMutation(userScope, fullIndexPath)
+	}
+	if errors.Is(err, commonerrors.ErrPathEscapesScope) {
+		return os.ErrPermission
+	}
+	return err
+}
+
+func (ffs *filteredFileSystem) requireCreatePermissionForNewFile(requestPath string) error {
+	idx := indexing.GetIndex(ffs.source)
+	if idx == nil {
+		return fmt.Errorf("source not found")
+	}
+	userScope, err := ffs.user.GetScopeForSourceName(ffs.source)
+	if err != nil {
+		return err
+	}
+	fullIndexPath := utils.JoinScopedIndexPath(userScope, strings.TrimPrefix(requestPath, "/"))
+	realPath, err := idx.GetRealPathForMutation(userScope, fullIndexPath)
+	if err != nil {
+		return err
+	}
+	if _, statErr := os.Stat(realPath); os.IsNotExist(statErr) {
+		return fmt.Errorf("create permission required")
+	}
+	return nil
+}
+
 // filteredFile wraps a webdav.File and filters Readdir results based on FileInfoFaster
 type filteredFile struct {
 	webdav.File
@@ -359,6 +408,11 @@ func (ffs *filteredFileSystem) Mkdir(ctx context.Context, name string, perm os.F
 		return err
 	}

+	if err := ffs.checkScopePath(name, false); err != nil {
+		logger.Debugf("Mkdir: scope check denied for %s: %v", name, err)
+		return err
+	}
+
 	if err := ffs.fs.Mkdir(ctx, name, perm); err != nil {
 		return err
 	}
@@ -390,6 +444,24 @@ func (ffs *filteredFileSystem) OpenFile(ctx context.Context, requestPath string,
 			logger.Debugf("OpenFile: write access denied for %s: %v", requestPath, err)
 			return nil, err
 		}
+
+		// A symlinked component must not carry the write outside the scope
+		if err := ffs.checkScopePath(requestPath, false); err != nil {
+			logger.Debugf("OpenFile: scope check denied for %s: %v", requestPath, err)
+			return nil, err
+		}
+
+		if (flag&os.O_CREATE) != 0 && !ffs.sourceFilePerms().Create {
+			if err := ffs.requireCreatePermissionForNewFile(requestPath); err != nil {
+				return nil, err
+			}
+		}
+	} else {
+		// A symlinked component must not carry the read outside the scope
+		if err := ffs.checkScopePath(requestPath, false); errors.Is(err, os.ErrPermission) {
+			logger.Debugf("OpenFile: read denied by scope for %s", requestPath)
+			return nil, os.ErrPermission
+		}
 	}

 	var desiredMtime time.Time
@@ -416,11 +488,14 @@ func (ffs *filteredFileSystem) OpenFile(ctx context.Context, requestPath string,
 				}
 				principal := quota.PrincipalForUpload(ffs.user, 0, "")
 				if state.HasApplicableQuotas(principal, sourcePath, fullIndexPath, "", 0) {
-					realPath, pathErr := resolvePutRealPath(idx, fullIndexPath)
+					realPath, pathErr := idx.GetRealPathForMutation(userScope, fullIndexPath)
 					if pathErr != nil {
 						_, clientErr := sanitizePutPathError(pathErr)
 						return nil, clientErr
 					}
+					if stat, statErr := os.Stat(realPath); statErr == nil && stat.IsDir() {
+						return nil, fmt.Errorf("path is a directory")
+					}
 					totalSize, hasTotalSize, sizeErr := parsePutTotalSize(ffs.httpReq)
 					if sizeErr != nil {
 						return nil, sizeErr
@@ -495,10 +570,46 @@ func (ffs *filteredFileSystem) RemoveAll(ctx context.Context, requestPath string
 		logger.Debugf("RemoveAll: access denied for %s: %v", requestPath, err)
 		return err
 	}
+	if err := ffs.checkScopePath(requestPath, true); err != nil {
+		logger.Debugf("RemoveAll: scope check denied for %s: %v", requestPath, err)
+		return err
+	}
+	// The API delete path frees the deleted bytes from the quota counters. Do the same
+	// here: a WebDAV DELETE, and the MOVE over an existing destination that the WebDAV
+	// library implements as RemoveAll + Rename, otherwise leave the old bytes charged
+	// until the next quota recount.
+	//
+	// The counters and the index speak source-relative paths, while requestPath is
+	// relative to the user's scope, so join the scope the way OpenFile does.
+	indexPath := requestPath
+	if userScope, scopeErr := ffs.user.GetScopeForSourceName(ffs.source); scopeErr == nil {
+		indexPath = utils.JoinScopedIndexPath(userScope, strings.TrimPrefix(requestPath, "/"))
+	}
+
+	var deleteBytes int64
+	var isDir bool
+	if info, err := ffs.fs.Stat(ctx, requestPath); err != nil {
+		logger.Debugf("RemoveAll: cannot stat %s before deleting, quota not adjusted: %v", requestPath, err)
+	} else if info.IsDir() {
+		isDir = true
+		deleteBytes, _ = state.IndexedPathBytes(ffs.source, indexPath, true)
+	} else {
+		deleteBytes = info.Size()
+	}
+
+	// Collect the adjustments before deleting: a directory delete also has to release
+	// folder quotas nested under it, and their sizes come from the index.
+	var adjustments state.DeleteAdjustments
+	if sourceInfo, ok := settings.Config.Server.NameToSource[ffs.source]; ok {
+		adjustments = state.PrepareAccountedDelete(ffs.user, ffs.source, sourceInfo.Path, indexPath, "", isDir, deleteBytes)
+	}

 	if err := ffs.fs.RemoveAll(ctx, requestPath); err != nil {
 		return err
 	}
+	if err := state.ApplyAccountedDelete(adjustments); err != nil {
+		logger.Warningf("quota adjust after webdav delete failed: %v", err)
+	}
 	activity.RecordWebDAVUser(ffs.httpReq, ffs.user, activitydb.Entry{
 		EventType: activitydb.EventDelete,
 		Source:    ffs.source,
@@ -527,9 +638,23 @@ func (ffs *filteredFileSystem) Rename(ctx context.Context, oldPath, newPath stri
 		return err
 	}

+	// Neither the moved entry nor the destination may resolve through a
+	// symlink outside the scope.
+	if err := ffs.checkScopePath(oldPath, true); err != nil {
+		logger.Debugf("Rename: scope check denied for source %s: %v", oldPath, err)
+		return err
+	}
+	if err := ffs.checkScopePath(newPath, false); err != nil {
+		logger.Debugf("Rename: scope check denied for destination %s: %v", newPath, err)
+		return err
+	}
+
 	if err := ffs.fs.Rename(ctx, oldPath, newPath); err != nil {
 		return err
 	}
+	if ffs.skipRenameActivityFrom != "" && oldPath == ffs.skipRenameActivityFrom {
+		return nil
+	}
 	activity.RecordWebDAVUser(ffs.httpReq, ffs.user, activitydb.Entry{
 		EventType:  activitydb.EventMove,
 		Source:     ffs.source,
@@ -545,6 +670,11 @@ func (ffs *filteredFileSystem) Rename(ctx context.Context, oldPath, newPath stri
 }

 func (ffs *filteredFileSystem) Stat(ctx context.Context, requestPath string) (os.FileInfo, error) {
+	// A symlinked component must not carry the stat outside the scope
+	if err := ffs.checkScopePath(requestPath, false); errors.Is(err, os.ErrPermission) {
+		return nil, os.ErrPermission
+	}
+
 	// Try to get file info (uses cache if available, FileInfoFaster otherwise)
 	_, err := ffs.getFileInfo(requestPath, false)
 	if err == nil {
@@ -581,6 +711,11 @@ func webDAVHandler(w http.ResponseWriter, r *http.Request, d *Context) (int, err
 	if status, permErr := webDAVMethodPermission(r.Method, filePerms); permErr != nil {
 		return status, permErr
 	}
+	if isWebDAVWriteMethod(r.Method) {
+		if status, roErr := denyIfSourceReadOnly(source); roErr != nil {
+			return status, roErr
+		}
+	}
 	requestPath := utils.AddTrailingSlashIfNotExists(r.PathValue("path"))
 	if !strings.HasPrefix(requestPath, "/") {
 		requestPath = "/" + requestPath
@@ -646,6 +781,18 @@ func webDAVHandler(w http.ResponseWriter, r *http.Request, d *Context) (int, err
 			}
 		},
 	}
+
+	// ownCloud-style chunked upload: the client PUTs `<name>-chunk-<n>` files as ordinary uploads
+	// and finishes by moving the last chunk to `<name>`; the chunks are concatenated here, and the
+	// final placement is left to the handler below so locks and `Overwrite` keep working.
+	if r.Method == "MOVE" {
+		if handled, status, err := owncloudChunkedMove(w, r, wd, filteredFS, requestPath, scopePath, prefix); handled {
+			if status != 0 {
+				return status, err
+			}
+			return 0, nil
+		}
+	}
 	if r.Method == "COPY" {
 		srcRealPath := filepath.Join(scopePath, requestPath)
 		sw := &statusResponseWriter{ResponseWriter: w, status: http.StatusOK}
@@ -687,8 +834,12 @@ func writeWebDAVOptions(w http.ResponseWriter, r *http.Request, ffs *filteredFil
 		candidates = []string{http.MethodGet, http.MethodHead, "PROPFIND", http.MethodPut, http.MethodDelete, "COPY", "MOVE"}
 	}

+	_, roErr := denyIfSourceReadOnly(ffs.source)
 	allowed := []string{http.MethodOptions}
 	for _, m := range candidates {
+		if roErr != nil && isWebDAVWriteMethod(m) {
+			continue
+		}
 		if _, err := webDAVMethodPermission(m, perms); err == nil {
 			allowed = append(allowed, m)
 		}
@@ -701,6 +852,15 @@ func writeWebDAVOptions(w http.ResponseWriter, r *http.Request, ffs *filteredFil
 	return http.StatusOK, nil
 }

+func isWebDAVWriteMethod(method string) bool {
+	switch method {
+	case "MKCOL", http.MethodPut, http.MethodDelete, "COPY", "MOVE":
+		return true
+	default:
+		return false
+	}
+}
+
 func webDAVMethodPermission(method string, perms users.SourceFilePermissions) (int, error) {
 	switch method {
 	case "PROPFIND", http.MethodOptions:
@@ -1,6 +1,7 @@
 package web

 import (
+	"context"
 	"fmt"
 	"io"
 	"net/http"
@@ -12,8 +13,11 @@ import (
 	"testing"
 	"time"

+	"golang.org/x/net/webdav"
+
 	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/files"
 	"github.com/gtsteffaniak/filebrowser/backend/internal/app"
+	databasequota "github.com/gtsteffaniak/filebrowser/backend/internal/database/quota"
 	_ "github.com/gtsteffaniak/filebrowser/backend/internal/database/sqldb" // Import to register SQL driver
 	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
 	commonerrors "github.com/gtsteffaniak/filebrowser/backend/internal/errors"
@@ -1146,3 +1150,138 @@ func TestWebDAV_OPTIONS(t *testing.T) {
 		}
 	})
 }
+
+type failedDeleteFileSystem struct{ webdav.FileSystem }
+
+func (failedDeleteFileSystem) RemoveAll(context.Context, string) error { return os.ErrPermission }
+
+func TestWebDAVDeleteNestedQuota(t *testing.T) {
+	for _, scope := range []string{"/", "/scoped"} {
+		t.Run(scope, func(t *testing.T) {
+			sourcePath := setupDeleteQuotaTest(t)
+			user, err := state.GetUserByUsername("admin")
+			if err != nil {
+				t.Fatal(err)
+			}
+			user.BackendScopes[0].Scope = scope
+			nested, sibling := seedNestedQuotaFixture(t, sourcePath, scope, &user)
+			ffs := &filteredFileSystem{fs: failedDeleteFileSystem{webdav.Dir(filepath.Join(sourcePath, scope))}, source: "Downloads", user: &user}
+			if err = ffs.RemoveAll(context.Background(), "/public"); err == nil {
+				t.Fatal("expected forbidden deletion")
+			}
+			ffs.filePerms = users.SourceFilePermissions{Delete: true}
+			if err = ffs.RemoveAll(context.Background(), "/public"); err == nil {
+				t.Fatal("expected underlying deletion failure")
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(nested.ID); used != 5 {
+				t.Fatalf("failed delete changed usage: %d", used)
+			}
+
+			req := httptest.NewRequest(http.MethodDelete, "/dav/Downloads/public", nil)
+			req.SetPathValue("source", "Downloads")
+			req.SetPathValue("path", "/public")
+			rec := httptest.NewRecorder()
+			_, err = webDAVHandler(rec, req, &requestContext{User: &user})
+			if err != nil || rec.Code != http.StatusNoContent {
+				t.Fatalf("delete: code=%d err=%v body=%s", rec.Code, err, rec.Body.String())
+			}
+			if _, err := os.Stat(filepath.Join(sourcePath, scope, "public")); !os.IsNotExist(err) {
+				t.Fatalf("ancestor still exists: %v", err)
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(nested.ID); used != 0 {
+				t.Fatalf("nested usage=%d, want 0", used)
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(sibling.ID); used != 7 {
+				t.Fatalf("sibling usage=%d, want 7", used)
+			}
+			req = httptest.NewRequest(http.MethodDelete, "/dav/Downloads/sibling/file", nil)
+			req.SetPathValue("source", "Downloads")
+			req.SetPathValue("path", "/sibling/file")
+			rec = httptest.NewRecorder()
+			if _, err := webDAVHandler(rec, req, &requestContext{User: &user}); err != nil || rec.Code != http.StatusNoContent {
+				t.Fatalf("file delete: code=%d err=%v", rec.Code, err)
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(sibling.ID); used != 0 {
+				t.Fatalf("file delete usage=%d, want 0", used)
+			}
+		})
+	}
+}
+
+// A WebDAV DELETE must free the deleted bytes from the quota counters, the way the
+// API delete path does, or the old bytes stay charged until the next recount.
+func TestWebDAV_DeleteFreesQuota(t *testing.T) {
+	testCases := []struct {
+		name       string
+		scope      string
+		webdavPath string
+		quotaPath  string
+		indexPath  string
+	}{
+		{
+			name:       "root scope",
+			scope:      "/",
+			webdavPath: "/public/readme.txt",
+			quotaPath:  "/",
+			indexPath:  "/public/readme.txt",
+		},
+		{
+			// The WebDAV path is relative to the user's scope; the quota and the
+			// index are not, so this case pins the scope join.
+			name:       "scoped user",
+			scope:      "/public",
+			webdavPath: "/readme.txt",
+			quotaPath:  "/public",
+			indexPath:  "/public/readme.txt",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			source1Path, _ := setupWebDAVTestEnv(t)
+
+			user := &users.User{
+				ID: 1,
+				FrontendUser: users.FrontendUser{
+					Username: "quotauser",
+				},
+				BackendScopes: []users.BackendScope{
+					{Path: source1Path, Scope: tc.scope},
+				},
+				BackendSourcePermissions: webDAVPermsForPaths(true, true, true, true, source1Path),
+				Version:                  users.SourcePermissionsMigrationVersion,
+			}
+			applyBackendSourcePerms(user, user.BackendSourcePermissions)
+
+			folderQuota, err := state.CreateFolderQuota(source1Path, tc.quotaPath, 0, 1<<20, databasequota.MeterAccounted)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			size := int64(len("public content"))
+			if err = state.ApplyAccountedUsageDelta(user, "source1", source1Path, tc.indexPath, "", size); err != nil {
+				t.Fatal(err)
+			}
+			if used, _ := state.GetQuotaCounterSnapshot(folderQuota.ID); used != size {
+				t.Fatalf("seeded counter = %d, want %d", used, size)
+			}
+
+			req := httptest.NewRequest(http.MethodDelete, "/dav/source1"+tc.webdavPath, nil)
+			req.SetPathValue("source", "source1")
+			req.SetPathValue("path", tc.webdavPath)
+
+			w := httptest.NewRecorder()
+			status, err := webDAVHandler(w, req, &requestContext{User: user})
+			if status != 0 && status != http.StatusOK && w.Code == 0 {
+				w.Code = status
+			}
+			if w.Code != http.StatusNoContent {
+				t.Fatalf("DELETE status = %d (err %v), want %d", w.Code, err, http.StatusNoContent)
+			}
+
+			if used, _ := state.GetQuotaCounterSnapshot(folderQuota.ID); used != 0 {
+				t.Fatalf("counter after DELETE = %d, want 0", used)
+			}
+		})
+	}
+}
@@ -0,0 +1,332 @@
+package web
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	"path"
+	"path/filepath"
+	"slices"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/gtsteffaniak/go-logger/logger"
+	"golang.org/x/net/webdav"
+
+	"github.com/gtsteffaniak/filebrowser/backend/internal/activity"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/adapters/fs/fileutils"
+	activitydb "github.com/gtsteffaniak/filebrowser/backend/internal/database/activity"
+)
+
+// Chunked uploads over WebDAV, in the shape rclone's `--owncloud-chunk-size` sends, which is what
+// clients need behind a proxy with a request size limit (`gtsteffaniak/filebrowser#2404`).
+//
+// Every chunk is an ordinary upload next to the destination, named `<name>-chunk-<n>` (some clients
+// hide them with a leading dot), and the transfer ends with a MOVE of the last chunk to `<name>`:
+//
+//	PUT  /dav/<source>/<dir>/<name>-chunk-0
+//	PUT  /dav/<source>/<dir>/<name>-chunk-1
+//	MOVE /dav/<source>/<dir>/<name>-chunk-1   Destination: /dav/<source>/<dir>/<name>
+//
+// The chunks are concatenated on that final MOVE. Nothing is uploaded into a namespace, so a
+// transfer in flight is visible in the listing, and an abandoned one leaves its chunks behind (the
+// client's retry overwrites them); the alternative, a hidden staging namespace, cannot be told apart
+// from a real folder named `uploads`.
+//
+// The assembled file is placed by the WebDAV handler itself, so locks, `Overwrite`, the
+// 201/204/412 choice and the containment of the destination under the scope stay the library's job.
+const owncloudChunkSuffix = "-chunk-"
+
+// owncloudChunk is one chunk file of an ownCloud-style upload, with the number in its name.
+type owncloudChunk struct {
+	number int
+	name   string
+}
+
+// owncloudChunkParts reports the destination an ownCloud chunk belongs to and which chunk it is:
+// `/dir/file.mp4-chunk-3` is chunk 3 of `/dir/file.mp4`.
+func owncloudChunkParts(requestPath string) (base string, number int, ok bool) {
+	idx := strings.LastIndex(requestPath, owncloudChunkSuffix)
+	if idx <= 0 || !isUploadChunkNumber(requestPath[idx+len(owncloudChunkSuffix):]) {
+		return "", 0, false
+	}
+	number, convErr := strconv.Atoi(requestPath[idx+len(owncloudChunkSuffix):])
+	if convErr != nil {
+		return "", 0, false
+	}
+	return requestPath[:idx], number, true
+}
+
+func isUploadChunkNumber(name string) bool {
+	if name == "" || len(name) > 9 {
+		return false
+	}
+	for _, c := range name {
+		if c < '0' || c > '9' {
+			return false
+		}
+	}
+	return true
+}
+
+// owncloudAssemblies tracks the real destination paths with an assembly in flight, so two
+// concurrent final MOVEs for the same file cannot interleave their chunks.
+var (
+	owncloudAssembliesMu sync.Mutex
+	owncloudAssemblies   = map[string]struct{}{}
+)
+
+func acquireOwncloudAssembly(realDest string) bool {
+	owncloudAssembliesMu.Lock()
+	defer owncloudAssembliesMu.Unlock()
+	if _, ok := owncloudAssemblies[realDest]; ok {
+		return false
+	}
+	owncloudAssemblies[realDest] = struct{}{}
+	return true
+}
+
+func releaseOwncloudAssembly(realDest string) {
+	owncloudAssembliesMu.Lock()
+	defer owncloudAssembliesMu.Unlock()
+	delete(owncloudAssemblies, realDest)
+}
+
+// owncloudChunkedMove handles the final MOVE of an ownCloud-style chunked upload, and reports
+// handled=false when the request is an ordinary move — including the move of a real file whose name
+// merely ends in `-chunk-<n>` and has no sibling chunks on disk.
+func owncloudChunkedMove(w http.ResponseWriter, r *http.Request, wd *webdav.Handler, ffs *filteredFileSystem, requestPath, scopePath, prefix string) (handled bool, status int, err error) {
+	// the handler normalizes request paths with a trailing slash, the chunk number is before it
+	sourceName := path.Base(strings.TrimSuffix(requestPath, "/"))
+	base, moved, ok := owncloudChunkParts(strings.TrimSuffix(requestPath, "/"))
+	if !ok {
+		return false, 0, nil
+	}
+	base = path.Clean("/" + base)
+	destPath, err := uploadDestinationPath(r, prefix)
+	if err != nil {
+		return true, http.StatusBadRequest, err
+	}
+	if destPath != base {
+		// a dot-prefixed chunk name is the hidden variant of the same transfer
+		if !strings.HasPrefix(path.Base(base), ".") || destPath != path.Join(path.Dir(base), strings.TrimPrefix(path.Base(base), ".")) {
+			// the client is moving the chunk somewhere else: not a chunked upload
+			return false, 0, nil
+		}
+	}
+	realDest := filepath.Join(scopePath, destPath)
+	realDir := filepath.Dir(realDest)
+	chunks, err := collectOwncloudChunks(realDir, path.Base(destPath))
+	if err != nil {
+		return false, 0, nil
+	}
+	// the moved chunk closes the transfer: a higher number is a leftover of an earlier, longer upload
+	// of the same name, and assembling it would mix two files together
+	chunks = slices.DeleteFunc(chunks, func(chunk owncloudChunk) bool { return chunk.number > moved })
+	// the chunk named in the request must be on disk, exactly under that name
+	if !slices.ContainsFunc(chunks, func(chunk owncloudChunk) bool { return chunk.name == sourceName }) {
+		return true, http.StatusNotFound, fmt.Errorf("chunk %s does not exist", sourceName)
+	}
+	if len(chunks) < 2 {
+		return false, 0, nil
+	}
+	for i, chunk := range chunks {
+		if i > 0 && chunk.number == chunks[i-1].number {
+			return true, http.StatusConflict, fmt.Errorf("chunked upload has two files for chunk %d", chunk.number)
+		}
+		if chunk.number != i {
+			return true, http.StatusConflict, fmt.Errorf("chunked upload is missing chunk %d of %d", i, chunks[len(chunks)-1].number)
+		}
+	}
+
+	// assembling deletes the chunks afterwards, and every chunk must be one the user may touch;
+	// check both up front so a denied transfer touches nothing
+	if !ffs.sourceFilePerms().Delete {
+		return true, http.StatusForbidden, fmt.Errorf("delete permission required")
+	}
+	destDir := path.Dir(destPath)
+	if err = ffs.checkScopePath(destDir, false); err != nil {
+		return true, http.StatusForbidden, fmt.Errorf("chunked upload destination denied: %w", err)
+	}
+	for _, chunk := range chunks {
+		if accessErr := ffs.checkAccess(path.Join(destDir, chunk.name)); accessErr != nil {
+			return true, http.StatusForbidden, fmt.Errorf("chunked upload cannot access chunk %s: %w", chunk.name, accessErr)
+		}
+	}
+
+	if !acquireOwncloudAssembly(realDest) {
+		return true, http.StatusConflict, fmt.Errorf("another chunked upload is already assembling %s", destPath)
+	}
+	defer releaseOwncloudAssembly(realDest)
+
+	// The assembled file is a random hidden name in the destination directory: it must not be able to
+	// collide with something the user already has (O_EXCL), and staying in that directory is what lets
+	// the library below move it with a plain rename.
+	tmp, err := os.CreateTemp(realDir, "."+path.Base(destPath)+".assembled-*")
+	if err != nil {
+		return true, http.StatusInternalServerError, err
+	}
+	realAssembled := tmp.Name()
+	if chmodErr := tmp.Chmod(fileutils.EffectiveFilePerm()); chmodErr != nil {
+		tmp.Close()
+		os.Remove(realAssembled)
+		return true, http.StatusInternalServerError, chmodErr
+	}
+	written, err := writeOwncloudChunks(realDir, chunks, tmp)
+	if err != nil {
+		os.Remove(realAssembled)
+		return true, http.StatusInternalServerError, err
+	}
+	if total := r.Header.Get("OC-Total-Length"); total != "" {
+		want, convErr := strconv.ParseInt(total, 10, 64)
+		if convErr != nil || want != written {
+			// keep the chunks: the client can retry the move with the missing bytes
+			os.Remove(realAssembled)
+			return true, http.StatusBadRequest, fmt.Errorf("assembled %d bytes, but OC-Total-Length is %q", written, total)
+		}
+	}
+
+	// Move the assembled file the way any other WebDAV move is done: the library cleans the paths,
+	// confirms the locks, honours `Overwrite` and answers 201/204/412 itself.
+	assembled := path.Join(destDir, filepath.Base(realAssembled))
+	// the library move of the hidden staging file is not a user-visible move: skip its activity
+	// record and record one upload for the real destination instead
+	ffs.skipRenameActivityFrom = assembled
+	original := r.URL.Path
+	r.URL.Path = prefix + assembled
+	sw := &statusResponseWriter{ResponseWriter: w, status: http.StatusOK}
+	wd.ServeHTTP(sw, r)
+	r.URL.Path = original
+	if sw.status >= 300 {
+		os.Remove(realAssembled)
+		return true, 0, nil
+	}
+	activity.RecordWebDAVUser(r, ffs.user, activitydb.Entry{
+		EventType: activitydb.EventUpload,
+		Source:    ffs.source,
+		Path:      destPath,
+		Details: activitydb.Details{
+			Source: ffs.source,
+			Path:   destPath,
+		},
+	})
+	for _, chunk := range chunks {
+		if err := os.Remove(filepath.Join(realDir, chunk.name)); err != nil {
+			logger.Debugf("webdav chunked upload: could not remove chunk %s: %v", chunk.name, err)
+		}
+	}
+	logger.Debugf("webdav chunked upload: assembled %d chunks (%d bytes) into %s", len(chunks), written, destPath)
+	return true, 0, nil
+}
+
+// collectOwncloudChunks lists the chunk files of one destination, lowest number first. Clients name
+// them `<name>-chunk-<n>`; a leading dot is accepted as well, as some clients hide them.
+//
+// shortcut: two real files `x-chunk-0` and `x-chunk-1` do get concatenated when the last of them is
+// moved to `x`; the protocol has no way to tell that intent apart, so the client's naming wins.
+func collectOwncloudChunks(realDir, baseName string) ([]owncloudChunk, error) {
+	entries, err := os.ReadDir(realDir)
+	if err != nil {
+		return nil, err
+	}
+	prefixes := []string{baseName + owncloudChunkSuffix, "." + baseName + owncloudChunkSuffix}
+	var chunks []owncloudChunk
+	for _, entry := range entries {
+		// only regular files are chunks: a symlink or device named `x-chunk-0` must never
+		// be read into the assembled file (Type()==0 means "unknown", openOwncloudChunks
+		// re-checks those against Lstat)
+		if t := entry.Type(); t != 0 && !t.IsRegular() {
+			continue
+		}
+		for _, p := range prefixes {
+			number, found := strings.CutPrefix(entry.Name(), p)
+			if !found || !isUploadChunkNumber(number) {
+				continue
+			}
+			n, _ := strconv.Atoi(number)
+			chunks = append(chunks, owncloudChunk{number: n, name: entry.Name()})
+			break
+		}
+	}
+	sort.Slice(chunks, func(i, j int) bool {
+		return chunks[i].number < chunks[j].number
+	})
+	return chunks, nil
+}
+
+func writeOwncloudChunks(realDir string, chunks []owncloudChunk, out *os.File) (int64, error) {
+	var written int64
+	for _, chunk := range chunks {
+		in, err := openOwncloudChunk(filepath.Join(realDir, chunk.name))
+		if err != nil {
+			out.Close()
+			return written, err
+		}
+		n, copyErr := io.Copy(out, in)
+		in.Close()
+		written += n
+		if copyErr != nil {
+			out.Close()
+			return written, copyErr
+		}
+	}
+	if err := out.Sync(); err != nil {
+		out.Close()
+		return written, err
+	}
+	return written, out.Close()
+}
+
+// openOwncloudChunk opens a chunk for reading without ever following a symlink: the entry is
+// Lstat'ed first (a symlink swap between ReadDir and open is caught by the SameFile check),
+// and on platforms that support it the open itself uses O_NOFOLLOW.
+func openOwncloudChunk(name string) (*os.File, error) {
+	lstat, err := os.Lstat(name)
+	if err != nil {
+		return nil, err
+	}
+	if !lstat.Mode().IsRegular() {
+		return nil, fmt.Errorf("chunk %s is not a regular file", filepath.Base(name))
+	}
+	in, err := os.OpenFile(name, os.O_RDONLY|owncloudNoFollowFlag, 0)
+	if err != nil {
+		return nil, err
+	}
+	stat, err := in.Stat()
+	if err == nil && (!stat.Mode().IsRegular() || !os.SameFile(lstat, stat)) {
+		err = fmt.Errorf("chunk %s changed while opening", filepath.Base(name))
+	}
+	if err != nil {
+		in.Close()
+		return nil, err
+	}
+	return in, nil
+}
+
+// uploadDestinationPath reads the Destination header of the final MOVE and returns the path inside
+// the source, the way the WebDAV client sees it (relative to the user's scope). The path is cleaned
+// the same way golang.org/x/net/webdav cleans it, i.e. anchored at the scope: a client cannot walk
+// out of its scope with `..`, and the caller gets exactly the path the library would have used.
+func uploadDestinationPath(r *http.Request, prefix string) (string, error) {
+	raw := r.Header.Get("Destination")
+	if raw == "" {
+		return "", fmt.Errorf("missing Destination header")
+	}
+	u, err := url.Parse(raw)
+	if err != nil {
+		return "", fmt.Errorf("invalid Destination header")
+	}
+	rest, ok := strings.CutPrefix(u.Path, prefix)
+	if !ok || (rest != "" && rest[0] != '/') {
+		return "", fmt.Errorf("destination is outside this source")
+	}
+	rest = path.Clean("/" + rest)
+	if rest == "/" || rest == "." {
+		return "", fmt.Errorf("destination is empty")
+	}
+	return rest, nil
+}
@@ -0,0 +1,539 @@
+package web
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	activityrec "github.com/gtsteffaniak/filebrowser/backend/internal/activity"
+	activitydb "github.com/gtsteffaniak/filebrowser/backend/internal/database/activity"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/database/users"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/state"
+	"github.com/gtsteffaniak/filebrowser/backend/internal/utils"
+)
+
+// chunkedUploadUser builds a user with the given permissions on source1.
+func chunkedUploadUser(source1Path, scope string, perms users.SourceFilePermissions) *users.User {
+	return &users.User{
+		ID: 1,
+		FrontendUser: users.FrontendUser{
+			Username: "chunked-uploader",
+		},
+		BackendScopes: []users.BackendScope{
+			{Path: source1Path, Scope: scope},
+		},
+		BackendSourcePermissions: map[string]users.SourceFilePermissions{source1Path: perms},
+		Version:                  users.SourcePermissionsMigrationVersion,
+	}
+}
+
+func chunkedUploadFullPerms() users.SourceFilePermissions {
+	return users.SourceFilePermissions{View: true, Download: true, Modify: true, Create: true, Delete: true}
+}
+
+// doSource1WebDAV calls the handler the way the router does, and reports the status the client
+// would see (the handler writes success codes itself and returns error codes).
+func doSource1WebDAV(t *testing.T, user *users.User, method, path string, body io.Reader, headers map[string]string) int {
+	t.Helper()
+	req := httptest.NewRequest(method, "/dav/source1"+path, body)
+	req.SetPathValue("source", "source1")
+	req.SetPathValue("path", path)
+	for k, v := range headers {
+		req.Header.Set(k, v)
+	}
+	w := httptest.NewRecorder()
+	status, err := webDAVHandler(w, req, &requestContext{User: user})
+	if status != 0 && status != http.StatusOK && (w.Code == 0 || w.Code == http.StatusOK) {
+		w.Code = status
+	}
+	if status >= 400 && err == nil {
+		t.Fatalf("%s %s: status %d without an error", method, path, status)
+	}
+	return w.Code
+}
+
+func mustPutChunk(t *testing.T, user *users.User, dir, name string, number int, content string) {
+	t.Helper()
+	path := fmt.Sprintf("%s/%s-chunk-%d", dir, name, number)
+	if got := doSource1WebDAV(t, user, http.MethodPut, path, strings.NewReader(content), nil); got != http.StatusCreated {
+		t.Fatalf("PUT %s: got %d, want 201", path, got)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_AssemblesChunks(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	// rclone's shape: the chunks are ordinary uploads next to the destination
+	parts := []string{"hello ", "big ", "world"}
+	for i, part := range parts {
+		mustPutChunk(t, user, "/public", "video.mp4", i, part)
+	}
+
+	got := doSource1WebDAV(t, user, "MOVE", "/public/video.mp4-chunk-2", nil, map[string]string{
+		"Destination":     "/dav/source1/public/video.mp4",
+		"OC-Total-Length": "15",
+	})
+	if got != http.StatusCreated {
+		t.Fatalf("MOVE of the last chunk: got %d, want 201", got)
+	}
+
+	content, err := os.ReadFile(filepath.Join(source1Path, "public", "video.mp4"))
+	if err != nil {
+		t.Fatalf("assembled file not written: %v", err)
+	}
+	if string(content) != "hello big world" {
+		t.Errorf("assembled content = %q, want %q", content, "hello big world")
+	}
+	entries, err := os.ReadDir(filepath.Join(source1Path, "public"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, entry := range entries {
+		if strings.Contains(entry.Name(), "-chunk-") || strings.Contains(entry.Name(), ".assembled-") {
+			t.Errorf("transfer artifact left behind: %s", entry.Name())
+		}
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_RefusesGapsAndWrongTotal(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	// a missing chunk must not be assembled into a shorter file
+	mustPutChunk(t, user, "/public", "gap.bin", 0, "abc")
+	mustPutChunk(t, user, "/public", "gap.bin", 2, "def")
+	got := doSource1WebDAV(t, user, "MOVE", "/public/gap.bin-chunk-2", nil, map[string]string{
+		"Destination":     "/dav/source1/public/gap.bin",
+		"OC-Total-Length": "6",
+	})
+	if got != http.StatusConflict {
+		t.Errorf("MOVE with a missing chunk: got %d, want 409", got)
+	}
+	if _, err := os.Stat(filepath.Join(source1Path, "public", "gap.bin")); !os.IsNotExist(err) {
+		t.Errorf("a truncated file was written anyway: %v", err)
+	}
+
+	// ... and neither must a total length that disagrees with the chunks
+	mustPutChunk(t, user, "/public", "short.bin", 0, "abc")
+	mustPutChunk(t, user, "/public", "short.bin", 1, "def")
+	got = doSource1WebDAV(t, user, "MOVE", "/public/short.bin-chunk-1", nil, map[string]string{
+		"Destination":     "/dav/source1/public/short.bin",
+		"OC-Total-Length": "99",
+	})
+	if got != http.StatusBadRequest {
+		t.Errorf("MOVE with a wrong total length: got %d, want 400", got)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_HonoursOverwrite(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+	existing := filepath.Join(source1Path, "public", "existing.bin")
+	if err := os.WriteFile(existing, []byte("do not lose me"), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	mustPutChunk(t, user, "/public", "existing.bin", 0, "new ")
+	mustPutChunk(t, user, "/public", "existing.bin", 1, "content")
+	// without `Overwrite: T` the destination must not be replaced (the WebDAV library's rule)
+	got := doSource1WebDAV(t, user, "MOVE", "/public/existing.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/existing.bin",
+	})
+	if got != http.StatusPreconditionFailed {
+		t.Errorf("MOVE onto an existing file without Overwrite: got %d, want 412", got)
+	}
+	if content, _ := os.ReadFile(existing); string(content) != "do not lose me" {
+		t.Errorf("existing file was replaced anyway: %q", content)
+	}
+
+	got = doSource1WebDAV(t, user, "MOVE", "/public/existing.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/existing.bin",
+		"Overwrite":   "T",
+	})
+	if got != http.StatusNoContent {
+		t.Errorf("MOVE with Overwrite: T: got %d, want 204", got)
+	}
+	if content, _ := os.ReadFile(existing); string(content) != "new content" {
+		t.Errorf("overwrite did not land: %q", content)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_CannotWriteOutsideTheScope(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	// the user is confined to /public
+	user := chunkedUploadUser(source1Path, "/public", chunkedUploadFullPerms())
+
+	// both the request path and the Destination climb out with `..`: this is the shape that enters the
+	// chunked move itself (they have to agree, or it is an ordinary move)
+	mustPutChunk(t, user, "/public/..", "escape.bin", 0, "ESCAPED")
+	mustPutChunk(t, user, "/public/..", "escape.bin", 1, "!")
+	got := doSource1WebDAV(t, user, "MOVE", "/public/../escape.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/../escape.bin",
+	})
+	if got != http.StatusCreated {
+		t.Fatalf("chunked move with a climbing path: got %d, want 201", got)
+	}
+	// the cleaned paths are anchored at the scope, so the file lands inside it and not above it,
+	// and it is the concatenation of both chunks (which only the chunked move produces)
+	content, err := os.ReadFile(filepath.Join(source1Path, "public", "escape.bin"))
+	if err != nil {
+		t.Errorf("assembled file is not inside the user's scope: %v", err)
+	} else if string(content) != "ESCAPED!" {
+		t.Errorf("assembled content = %q, want %q", content, "ESCAPED!")
+	}
+	if _, statErr := os.Stat(filepath.Join(source1Path, "public", "escape.bin-chunk-0")); !os.IsNotExist(statErr) {
+		t.Errorf("a chunk was left behind: %v", statErr)
+	}
+	if _, statErr := os.Stat(filepath.Join(source1Path, "escape.bin")); !os.IsNotExist(statErr) {
+		t.Errorf("the climbing path escaped the scope: %v", statErr)
+	}
+
+	// a Destination that resolves somewhere else entirely is not a chunked upload, and the library
+	// refuses to move the chunk there
+	mustPutChunk(t, user, "", "other.bin", 0, "a")
+	mustPutChunk(t, user, "", "other.bin", 1, "b")
+	got = doSource1WebDAV(t, user, "MOVE", "/other.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/../../" + strings.Repeat("../", 20) + "tmp/fb_escape_probe.txt",
+	})
+	if got < 300 {
+		t.Errorf("MOVE to a destination outside the source: got %d, want an error", got)
+	}
+	if _, statErr := os.Stat("/tmp/fb_escape_probe.txt"); !os.IsNotExist(statErr) {
+		t.Fatalf("path traversal escaped the scope (status %d): %v", got, statErr)
+	}
+
+	// and no half-assembled file is left behind anywhere the user can see
+	entries, err := os.ReadDir(filepath.Join(source1Path, "public"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, entry := range entries {
+		if strings.Contains(entry.Name(), ".assembled") {
+			t.Errorf("assembled temp file left behind: %s", entry.Name())
+		}
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_PlainMoveStillWorks(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	// a real file whose name ends in -chunk-N, with no siblings, is an ordinary file
+	doSource1WebDAV(t, user, http.MethodPut, "/public/notes-chunk-1", strings.NewReader("just notes"), nil)
+	got := doSource1WebDAV(t, user, "MOVE", "/public/notes-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/notes.txt",
+	})
+	if got != http.StatusCreated {
+		t.Fatalf("MOVE of a plain file: got %d, want 201", got)
+	}
+	content, err := os.ReadFile(filepath.Join(source1Path, "public", "notes.txt"))
+	if err != nil || string(content) != "just notes" {
+		t.Errorf("plain move lost the file: %v %q", err, content)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_DoesNotDestroyCollidingTemp(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	// a user file that looks like our staging name must survive the upload
+	colliding := filepath.Join(source1Path, "public", ".video.mp4.assembled")
+	if err := os.WriteFile(colliding, []byte("user data"), 0644); err != nil {
+		t.Fatal(err)
+	}
+	mustPutChunk(t, user, "/public", "video.mp4", 0, "hello ")
+	mustPutChunk(t, user, "/public", "video.mp4", 1, "world")
+	got := doSource1WebDAV(t, user, "MOVE", "/public/video.mp4-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/video.mp4",
+	})
+	if got != http.StatusCreated {
+		t.Fatalf("MOVE: got %d, want 201", got)
+	}
+	if content, err := os.ReadFile(colliding); err != nil || string(content) != "user data" {
+		t.Errorf("the colliding file was destroyed: %v %q", err, content)
+	}
+	if content, err := os.ReadFile(filepath.Join(source1Path, "public", "video.mp4")); err != nil || string(content) != "hello world" {
+		t.Errorf("assembled content = %q, %v", content, err)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_RecordsUploadNotTempMove(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	mustPutChunk(t, user, "/public", "audit.bin", 0, "aa")
+	mustPutChunk(t, user, "/public", "audit.bin", 1, "bb")
+	if got := doSource1WebDAV(t, user, "MOVE", "/public/audit.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/audit.bin",
+	}); got != http.StatusCreated {
+		t.Fatalf("MOVE: got %d, want 201", got)
+	}
+
+	activityrec.FlushNow()
+	rows, _, err := state.ListActivity(activitydb.QueryFilter{Limit: 100})
+	if err != nil {
+		t.Fatal(err)
+	}
+	var uploads, moves int
+	for _, row := range rows {
+		if strings.Contains(row.Path, ".assembled-") {
+			t.Errorf("activity recorded the hidden staging name: %s %q", row.EventType, row.Path)
+		}
+		switch row.EventType {
+		case activitydb.EventUpload:
+			uploads++
+			if row.Path != "/public/audit.bin" {
+				t.Errorf("upload recorded for %q, want /public/audit.bin", row.Path)
+			}
+		case activitydb.EventMove:
+			moves++
+		}
+	}
+	if uploads != 1 {
+		t.Errorf("expected exactly one upload entry, got %d", uploads)
+	}
+	if moves != 0 {
+		t.Errorf("expected no move entries for the staging file, got %d", moves)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_SkipsSymlinkChunks(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	outside := filepath.Join(t.TempDir(), "outside-secret.txt")
+	if err := os.WriteFile(outside, []byte("OUTSIDE-SECRET"), 0644); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink(outside, filepath.Join(source1Path, "public", "link.bin-chunk-0")); err != nil {
+		t.Skipf("cannot create symlink: %v", err)
+	}
+	mustPutChunk(t, user, "/public", "link.bin", 1, "REAL")
+
+	got := doSource1WebDAV(t, user, "MOVE", "/public/link.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/link.bin",
+	})
+	if got != http.StatusCreated {
+		t.Fatalf("MOVE: got %d, want 201", got)
+	}
+	// with the symlink ignored only one chunk remains: this is a plain move of that chunk,
+	// and the outside file's content must never land in the destination
+	content, err := os.ReadFile(filepath.Join(source1Path, "public", "link.bin"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(string(content), "OUTSIDE") {
+		t.Errorf("symlink chunk content leaked into the destination: %q", content)
+	}
+	if string(content) != "REAL" {
+		t.Errorf("destination = %q, want %q", content, "REAL")
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_RequiresDeletePermission(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", users.SourceFilePermissions{
+		View: true, Download: true, Modify: true, Create: true,
+	})
+
+	mustPutChunk(t, user, "/public", "nodelete.bin", 0, "aa")
+	mustPutChunk(t, user, "/public", "nodelete.bin", 1, "bb")
+	got := doSource1WebDAV(t, user, "MOVE", "/public/nodelete.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/nodelete.bin",
+	})
+	if got != http.StatusForbidden {
+		t.Errorf("MOVE without delete permission: got %d, want 403", got)
+	}
+	// a denied transfer touches nothing
+	for _, name := range []string{"nodelete.bin-chunk-0", "nodelete.bin-chunk-1"} {
+		if _, err := os.Stat(filepath.Join(source1Path, "public", name)); err != nil {
+			t.Errorf("chunk %s was touched: %v", name, err)
+		}
+	}
+	if _, err := os.Stat(filepath.Join(source1Path, "public", "nodelete.bin")); !os.IsNotExist(err) {
+		t.Errorf("destination was written anyway: %v", err)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_DeniedChunkTouchesNothing(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	mustPutChunk(t, user, "/public", "denied.bin", 0, "aa")
+	mustPutChunk(t, user, "/public", "denied.bin", 1, "bb")
+	if err := state.DenyUser(source1Path, utils.IndexPathFromNormalized("/public/denied.bin-chunk-0", false), "chunked-uploader"); err != nil {
+		t.Fatalf("failed to set up access rule: %v", err)
+	}
+	got := doSource1WebDAV(t, user, "MOVE", "/public/denied.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/denied.bin",
+	})
+	if got != http.StatusForbidden {
+		t.Errorf("MOVE over a denied chunk: got %d, want 403", got)
+	}
+	for _, name := range []string{"denied.bin-chunk-0", "denied.bin-chunk-1"} {
+		if _, err := os.Stat(filepath.Join(source1Path, "public", name)); err != nil {
+			t.Errorf("chunk %s was touched: %v", name, err)
+		}
+	}
+	if _, err := os.Stat(filepath.Join(source1Path, "public", "denied.bin")); !os.IsNotExist(err) {
+		t.Errorf("destination was written anyway: %v", err)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_MovedChunkMustExist(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	mustPutChunk(t, user, "/public", "miss.bin", 0, "aa")
+	mustPutChunk(t, user, "/public", "miss.bin", 1, "bb")
+	got := doSource1WebDAV(t, user, "MOVE", "/public/miss.bin-chunk-5", nil, map[string]string{
+		"Destination": "/dav/source1/public/miss.bin",
+	})
+	if got != http.StatusNotFound {
+		t.Errorf("MOVE of a chunk that does not exist: got %d, want 404", got)
+	}
+	for _, name := range []string{"miss.bin-chunk-0", "miss.bin-chunk-1"} {
+		if _, err := os.Stat(filepath.Join(source1Path, "public", name)); err != nil {
+			t.Errorf("chunk %s was touched: %v", name, err)
+		}
+	}
+	if _, err := os.Stat(filepath.Join(source1Path, "public", "miss.bin")); !os.IsNotExist(err) {
+		t.Errorf("destination was written anyway: %v", err)
+	}
+}
+
+func TestOwncloudAssemblyInFlight(t *testing.T) {
+	dest := filepath.Join(t.TempDir(), "file.bin")
+	if !acquireOwncloudAssembly(dest) {
+		t.Fatal("first acquire should succeed")
+	}
+	if acquireOwncloudAssembly(dest) {
+		t.Error("second acquire for the same destination should fail while one is in flight")
+	}
+	if !acquireOwncloudAssembly(dest + ".other") {
+		t.Error("a different destination should not be blocked")
+	}
+	releaseOwncloudAssembly(dest + ".other")
+	releaseOwncloudAssembly(dest)
+	if !acquireOwncloudAssembly(dest) {
+		t.Error("acquire after release should succeed")
+	}
+	releaseOwncloudAssembly(dest)
+}
+
+func TestWebDAV_OwncloudChunkedUploadPathParsing(t *testing.T) {
+	cases := []struct {
+		path          string
+		base          string
+		ok            bool
+		chunkNumber   string
+		validChunkNum bool
+	}{
+		{"/public/video.mp4-chunk-0", "/public/video.mp4", true, "0", true},
+		{"/video.mp4-chunk-12", "/video.mp4", true, "12", true},
+		{"/video.mp4-chunk-", "", false, "", false},
+		{"/chunk-1", "", false, "1", true},
+		{"/public/readme.txt", "", false, "", false},
+		{"/public/video.mp4-chunk-00x", "", false, "00x", false},
+		{"/public/video.mp4-chunk-1234567890", "", false, "1234567890", false},
+	}
+	for _, tc := range cases {
+		base, _, ok := owncloudChunkParts(tc.path)
+		if base != tc.base || ok != tc.ok {
+			t.Errorf("owncloudChunkParts(%q) = %q, %v; want %q, %v", tc.path, base, ok, tc.base, tc.ok)
+		}
+		if got := isUploadChunkNumber(tc.chunkNumber); got != tc.validChunkNum {
+			t.Errorf("isUploadChunkNumber(%q) = %v, want %v", tc.chunkNumber, got, tc.validChunkNum)
+		}
+	}
+}
+
+func TestWebDAV_UploadDestinationPathIsCleaned(t *testing.T) {
+	cases := []struct {
+		destination string
+		want        string
+	}{
+		{"/dav/source1/public/file.txt", "/public/file.txt"},
+		{"/dav/source1/public/../../tmp/x.txt", "/tmp/x.txt"},
+		{"/dav/source1/public/" + strings.Repeat("../", 25) + "tmp/x.txt", "/tmp/x.txt"},
+		{"/dav/source1/", ""},
+		{"/dav/source1", ""},
+	}
+	for _, tc := range cases {
+		req := httptest.NewRequest("MOVE", "/dav/source1/public/x-chunk-0", nil)
+		req.Header.Set("Destination", tc.destination)
+		got, err := uploadDestinationPath(req, "/dav/source1")
+		if tc.want == "" {
+			if err == nil {
+				t.Errorf("uploadDestinationPath(%q) = %q, want an error", tc.destination, got)
+			}
+			continue
+		}
+		if err != nil || got != tc.want {
+			t.Errorf("uploadDestinationPath(%q) = %q, %v; want %q", tc.destination, got, err, tc.want)
+		}
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_IgnoresChunksAboveTheMovedOne(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	// chunk 2 is a leftover of an earlier, longer upload of the same name: the client closes this
+	// transfer with chunk 1, so only 0 and 1 belong to it
+	mustPutChunk(t, user, "/public", "mixed.bin", 0, "AAA")
+	mustPutChunk(t, user, "/public", "mixed.bin", 1, "BBB")
+	mustPutChunk(t, user, "/public", "mixed.bin", 2, "CCC")
+	got := doSource1WebDAV(t, user, "MOVE", "/public/mixed.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/mixed.bin",
+	})
+	if got != http.StatusCreated {
+		t.Fatalf("MOVE: got %d, want 201", got)
+	}
+	if content, err := os.ReadFile(filepath.Join(source1Path, "public", "mixed.bin")); err != nil || string(content) != "AAABBB" {
+		t.Errorf("assembled %q, %v; want %q", content, err, "AAABBB")
+	}
+	if _, err := os.Stat(filepath.Join(source1Path, "public", "mixed.bin-chunk-2")); err != nil {
+		t.Errorf("the chunk of another transfer was consumed: %v", err)
+	}
+}
+
+func TestWebDAV_OwncloudChunkedUpload_RejectsTwoFilesForOneChunk(t *testing.T) {
+	source1Path, _ := setupWebDAVTestEnv(t)
+	initTestIndex(t, "source1", source1Path)
+	user := chunkedUploadUser(source1Path, "/", chunkedUploadFullPerms())
+
+	mustPutChunk(t, user, "/public", "dup.bin", 0, "aaa")
+	mustPutChunk(t, user, "/public", "dup.bin", 1, "bbb")
+	// a hidden copy of a chunk, which clients that hide them would also leave behind
+	if err := os.WriteFile(filepath.Join(source1Path, "public", ".dup.bin-chunk-0"), []byte("zzz"), 0644); err != nil {
+		t.Fatal(err)
+	}
+	got := doSource1WebDAV(t, user, "MOVE", "/public/dup.bin-chunk-1", nil, map[string]string{
+		"Destination": "/dav/source1/public/dup.bin",
+	})
+	if got != http.StatusConflict {
+		t.Errorf("MOVE with two files for one chunk: got %d, want 409", got)
+	}
+	if _, err := os.Stat(filepath.Join(source1Path, "public", "dup.bin")); !os.IsNotExist(err) {
+		t.Errorf("a file was written from an ambiguous transfer: %v", err)
+	}
+}
@@ -0,0 +1,9 @@
+//go:build !windows
+
+package web
+
+import "syscall"
+
+// owncloudNoFollowFlag is OR'ed into the open flags for chunk files so a symlink can never
+// be followed even if it is swapped in between the Lstat check and the open.
+const owncloudNoFollowFlag = syscall.O_NOFOLLOW
Author	SHA1	Message	Date
Graham Steffaniak	8415d5f1ff	Fix install button (#3312 )	2026-10-31 08:27:12 -05:00
Graham Steffaniak	85f934208c	replace button with link	2026-10-31 08:20:44 -05:00
FandacqkaCorp FandacqkaCorp Claude Sonnet 5.5	1022ecafef	fix(frontend): address CodeRabbit follow-ups from #3276 and #3303 (#3311 ) Co-authored-by: FandacqkaCorp <275647464+FandacqkaCorp@users.noreply.github.com> Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>	2026-10-31 08:17:44 -05:00
Graham Steffaniak	062ac9fb2d	Beta/v2.1.4 (#3307 )	2026-10-30 19:14:33 -05:00
Graham SteffaniakandGraham Steffaniak	cecdd79fcc	Restrict Unix socket forwarded-header trust with peer credentials (#3309 ) Co-authored-by: Graham Steffaniak <gtsteffaniak@users.noreply.github.com>	2026-10-30 18:40:10 -05:00
Graham Steffaniak	ac50ecfd18	fix: CodeRabbit follow-ups from #3307 (quick-win bugfixes) (#3308 )	2026-10-30 17:56:50 -05:00
Graham Steffaniak	71cc2f3f1b	fixed linting	2026-10-30 16:30:00 -05:00
Graham Steffaniak	1b3f47f176	fix sensitive data GHSA-892f-9h5p-mfc8 (#3306 )	2026-10-30 16:25:25 -05:00
Graham Steffaniak	219b64b5ec	addressed deep copy issue	2026-10-30 15:37:45 -05:00
Graham Steffaniak	3ef4928ed7	fix: prevent visible border in generated maskable PWA icons (#3300 )	2026-10-30 15:33:33 -05:00
Graham Steffaniak	df0a5ad10c	fix sensitive data GHSA-892f-9h5p-mfc8	2026-10-30 15:22:46 -05:00
Graham Steffaniak	a43d0ab2d3	updated changelog	2026-10-30 15:05:34 -05:00
Graham Steffaniak	9de09e5ec8	feat(search): sidebar File actions and close button in advanced search (#3303 )	2026-10-30 15:02:51 -05:00
Graham Steffaniak	9d38c686a1	updated changelog	2026-10-30 15:01:15 -05:00
Graham Steffaniak	1cfca112e4	fix empty view after login if source named 'Files' (#3304 )	2026-10-30 14:51:04 -05:00
Graham Steffaniak	f540e22dc9	fix(quotas): complete delete accounting for bulk and nested resets (#3305 )	2026-10-30 13:26:38 -05:00
Graham Steffaniak	dade856ebe	fix(move-copy): require choosing a destination when none can be inferred (advanced search) (#3276 )	2026-10-30 13:19:15 -05:00
Graham SteffaniakandCursor	2f1da21253	fix(quotas): complete delete accounting for bulk and nested resets Follow-up to #3235 / #3163: reset accounted folder quotas inside deleted directories without index lookups, wire the same prepare/apply path into bulk and public delete handlers, and dedupe scope quota selection. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-30 13:04:16 -05:00
Kevin B.	de8d2acd43	fix empty view after login	2026-10-30 13:04:15 -05:00
Graham Steffaniak	6375be202e	fix: release nested folder quotas when deleting their ancestor (#3235 )	2026-10-30 12:59:12 -05:00
FandacqkaCorpandClaude Sonnet 5.5	816b99cee0	feat(search): add a close button to advanced search On tool pages the top bar button only toggles the sidebar, so the only ways out of advanced search were the sidebar or the browser back button. Add an icon-only grey X at the top-left of the advanced search page (first element of the tools wrapper); the top bar button is left as it is. It clears the selection and goes back to the page the search was opened from, or to /files when there is none (e.g. the URL was opened directly). Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>	2026-10-30 16:14:12 +01:00
FandacqkaCorpandClaude Sonnet 5.5	bf349a7dcd	feat(search): show the sidebar File actions in advanced search The sidebar File actions button only exists in the listing, so in advanced search the actions on the selected results (select all, download, copy, move) were only reachable through the context menu, which is hard to find, especially on touch devices. Show the same sidebar button in advanced search. There it opens the context menu on the current selection instead of the create-only menu, and it doesn't depend on create permissions (the menu already checks permissions per source). The menu now always offers Select multiple in advanced search, so single results can be selected when "open with a single click" is on, and hides the create (+) toggle, since results have no single folder to create in. The button still honours the "hide sidebar file actions" preference and isn't shown in shares. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>	2026-10-30 15:55:48 +01:00
Matt Van Horn	db6504bf80	fix: prevent visible border in generated maskable PWA icons Maskable icon generation now alpha-composites the resized artwork over the opaque background using `OverlayCenter`. Added tests covering transparent padding and opaque edges, verifying the output dimensions, opacity, and background pixels outside the artwork. Fixes #3187	2026-10-30 03:59:21 -07:00
FandacqkaCorpandClaude Sonnet 5.5	2019d573f8	fix(move-copy): require choosing a destination when there is no source to fall back to In advanced search the open request is the list of results and has no source. The Copy/Move prompt then showed "Choose a source" but, if the button was pressed without choosing anything, silently sent the items to the root of the first selected item's source. Disable the Copy/Move button until a destination source is chosen in that case (no destination yet and no source in the open request, outside shares), and use the existing "Choose a source" text as its tooltip. Normal listings and shares are unchanged. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>	2026-10-30 11:05:37 +01:00
Matt Van Horn	d716fc15ec	test: share the nested quota delete fixture between API and WebDAV tests TestResourceDeleteNestedQuota and TestWebDAVDeleteNestedQuota seeded the same files, quotas and usage deltas. Move that setup into seedNestedQuotaFixture and call it from both.	2026-10-30 00:28:00 -07:00
Graham Steffaniak	56e16608e4	fix(frontend): keep video loading spinner off when the fetch stalls mid-playback (#3289 )	2026-10-29 19:19:47 -05:00
Graham Steffaniak	c471fc135b	fix(frontend): use native video fullscreen on iPhone (#3288 )	2026-10-29 19:18:33 -05:00
Graham Steffaniak	5112cf87b1	fix(analytics): report freebsd instead of "other" in system.os (#3284 )	2026-10-29 19:17:23 -05:00
Graham Steffaniak	3d7bac47ee	fix(stream): play single-file share media on Windows (#3271 )	2026-10-29 19:10:22 -05:00
vulragrag-star	2a38d2fa1e	fix(users): enforce lockPassword on self-service password changes (#3283 )	2026-10-29 19:01:34 -05:00
Matt Van Horn	82e110c08d	test: cover scoped users in the API nested quota delete test The API path is scope-relative while quota paths and the index are source-relative. Run the test for a user scoped to /scoped as well as /, which fails if the delete looks up the unscoped path.	2026-10-29 08:14:00 -07:00
Matt Van Horn	f4c96078a1	Merge remote-tracking branch 'upstream/main' into fix/3163-release-nested-folder-quotas-on-delete # Conflicts: # backend/internal/web/resource.go # backend/internal/web/webdav.go # backend/internal/web/webdav_test.go	2026-10-29 08:14:00 -07:00
Graham Steffaniak Lucas Siqueira Cursor	975adedabb	Address directory indexing bugs (#3292 ) Co-authored-by: Lucas Siqueira <lucas.morais.siqueira@gmail.com> Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-28 10:29:42 -05:00
Graham Steffaniak	14ec0eba0d	Fix indexing regressions (#3260 )	2026-10-27 19:41:12 -05:00
Lucas de Morais SiqueiraandGraham Steffaniak	307d5f6591	fix(indexing): skip unreadable directory entries instead of failing the listing (#3184 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-27 19:25:01 -05:00
Get The Fork Off	ff9df43356	fix(frontend): keep video loading spinner off when the fetch stalls mid-playback	2026-10-27 20:50:30 -03:00
Get The Fork Off	802e91aa05	fix(frontend): use native video fullscreen on iPhone	2026-10-27 20:48:46 -03:00
NefelibateLGandZCode Scout	28ef44cdec	fix(analytics): report freebsd instead of "other" in system.os The analytics snapshot classified every GOOS outside {linux, windows, darwin} as "other", so the shipped freebsd-amd64 release binary reported "os": "other" in the analytics payload even though backend/.goreleaser.yaml builds freebsd as a first-class target (#3244). Add freebsd to the mapSystemOS whitelist, matching the release build matrix, and add a table-driven test covering all four shipped GOOS values plus the unsupported and empty fallbacks. Fixes #3244 Co-authored-by: ZCode Scout <noreply@zcode.local> Signed-off-by: NefelibateLG <3453510037@qq.com>	2026-10-27 09:16:06 +08:00
sarankumar1325	0ee0f35301	fix(stream): play single-file share media on Windows shareRelativeDisplayName ran filepath.Base on slash-separated paths. On Windows filepath.Base("/") returns "\", which passed the "/" check, so a single-file share streamed with file=/ got "\" as its name instead of the shared file's name. IsMediaStreamFile then rejected it and the stream endpoint answered 403 "stream endpoint supports audio and video only". Use path.Base, since both the share-relative path and the share path are slash-separated. Fixes #3270	2026-10-25 11:30:00 +05:30
Graham Steffaniak	cc99aa542e	updated with symlink extraction change (#3265 )	2026-10-23 15:36:09 -05:00
Graham Steffaniak Cursor Agent Graham Steffaniak	8514da4a9a	fix(auth): API token permission handling for customized tokens (#3255 ) Co-authored-by: Cursor Agent <cursoragent@cursor.com> Co-authored-by: Graham Steffaniak <gtsteffaniak@users.noreply.github.com>	2026-10-23 14:48:18 -05:00
Graham SteffaniakandDevin	4625b89528	fix webp preview support (#3259 ) Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>	2026-10-22 15:34:57 -05:00
Jay Hemnani	b2a07196b7	fix(archive): extract tar hard links instead of dropping them (#3234 )	2026-10-22 15:26:16 -05:00
Graham Steffaniak	0a8698ee4d	updated changelog	2026-10-22 15:24:08 -05:00
Snuupy Graham Steffaniak Devin	ec8ad36c95	Feature/html preview navigation and media (#3131 ) Co-authored-by: Graham Steffaniak <graham.steffaniak@autodesk.com> Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>	2026-10-22 15:13:31 -05:00
vulragrag-star	2c0c1b4bb2	fix(frontend): show the share banner to public visitors (#3250 )	2026-10-22 13:38:49 -05:00
Thorsten Liborius	6fa71bd13d	fix(frontend): show correct relative expiration time for sharesFix/share expiry relative time (#3247 )	2026-10-21 18:47:44 -05:00
Graham Steffaniakandcoderabbitai[bot]	06aa16e7d7	fix raw embedded image support - rtf rw2 raw rwl (#3243 ) Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>	2026-10-20 17:43:38 -05:00
Graham Steffaniak	b0f6d53f49	fix arm32 build in v2.1.3 (#3242 )	2026-10-20 14:57:09 -05:00
Graham Steffaniak	d27ab6a00b	fix arm32 build in v2.1.3	2026-10-20 14:56:36 -05:00
Graham Steffaniak	f0fb859479	updated package dependencies and replaced katex with temml (#3241 )	2026-10-20 13:51:58 -05:00
Graham Steffaniak	4c8a913377	updated backage dependencies and replaced katex with temml	2026-10-20 13:31:43 -05:00
Graham Steffaniak	c1684baffd	Beta/v2.1.3 (#3238 )	2026-10-20 12:47:40 -05:00
Matt Van Horn	bb45ebcce1	fix: avoid shadowing err in nested quota delete tests	2026-10-20 10:41:27 -07:00
Graham Steffaniak Cursor Agent Graham Steffaniak	18138b1ab5	Fix CodeRabbit findings from PR #3238 (#3240 ) Co-authored-by: Cursor Agent <cursoragent@cursor.com> Co-authored-by: Graham Steffaniak <gtsteffaniak@users.noreply.github.com>	2026-10-20 12:31:48 -05:00
Matt Van Horn	26665efc13	fix: release nested folder quotas when deleting their ancestor Adds shared preparation and application helpers for API and WebDAV deletion accounting. Before deletion removes index metadata, each nested accounted quota is measured independently, while covering, scope, and share quotas use the deleted item's size. Adjustments are applied only after deletion succeeds, and unknown sizes are omitted. API deletion also derives the source index path from the item's real path. Fixes #3163	2026-10-20 04:39:51 -07:00
Graham SteffaniakandDevin	98851e029f	fix(access): match lowercase rule keys in path existence and rule updates (#3237 ) Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>	2026-10-19 13:50:08 -05:00
Graham Steffaniak Cursor Agent Graham Steffaniak coderabbitai[bot]	4a1a3bbe09	fix(access): lowercase access-rule keys with migration (GHSA-4vrc-935w-xxq2) (#3232 ) Co-authored-by: Cursor Agent <cursoragent@cursor.com> Co-authored-by: Graham Steffaniak <gtsteffaniak@users.noreply.github.com> Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>	2026-10-19 13:50:08 -05:00
Graham Steffaniak	a6d7f7c64c	fix(auth): password-gate passkey enrollment changes (GHSA-r744-4vm3-2px3) (#3198 )	2026-10-19 13:50:08 -05:00
Graham Steffaniak	ada7a18620	Use statx reduce redundant calls (#3230 )	2026-10-19 13:50:08 -05:00
Graham Steffaniak	4f4ea2370e	updated linting and tests on macos (#3231 )	2026-10-19 13:50:08 -05:00
Graham Steffaniak	52aa314e1d	fix(quota): count upload usage against accounted limits (GHSA-m57f-66qj-8jxg) (#3201 )	2026-10-19 13:50:08 -05:00
Kevin B.andGraham Steffaniak	1d6f67cc20	update frontend deps (v2.1.3) (#3228 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-19 13:50:08 -05:00
Graham Steffaniak	d89b7e7deb	fix(events): hold client locks during SSE sends (GHSA-p9wm-f5jj-75pj) (#3227 )	2026-10-19 12:37:04 -05:00
Graham Steffaniak	e26bd29848	fix(archive): enforce access on unarchive extraction (GHSA-p93p-v944-4p44) (#3203 )	2026-10-19 12:37:04 -05:00
Graham Steffaniak	9c2b98655a	fix: enforce readOnly on WebDAV, archive and OnlyOffice (GHSA-4v62-884x-2466) (#3202 )	2026-10-19 12:37:04 -05:00
Paolo VallettaandGraham Steffaniak	a379f047d1	fix(indexing): resume the persisted scan schedule on startup (#3225 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-19 12:37:04 -05:00
Kevin B.andGraham Steffaniak	f4879be6bf	fix path picker list on shares (#3223 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-19 12:23:45 -05:00
Kevin B.andGraham Steffaniak	7751da745d	Hide activity, quota, access buttons in Info prompt in shares (#3224 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-19 12:23:17 -05:00
Graham Steffaniak	80cedcb4d5	fix(frontend): clear stale upload navigation approval when idle (#3222 )	2026-10-18 13:48:38 -05:00
Graham Steffaniak	ac19abf7d2	fix(frontend): restore upload guards while uploads are paused (#3220 )	2026-10-18 13:48:38 -05:00
Graham Steffaniak	38e868e5af	fix(frontend): resolve /files/ to default source for single-source installs (#3215 )	2026-10-18 13:48:38 -05:00
anonymous-writerandGraham Steffaniak	b3af5cc2d7	Fix upload session not released after successful single-file upload (#3186 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-18 13:48:38 -05:00
Paolo VallettaandGraham Steffaniak	b399de3d92	fix(webdav): free the deleted bytes from the quota counters (#3160 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-18 13:45:50 -05:00
Graham Steffaniak	99f1a14e7b	fix(shares): correct share path updates on folder move (GHSA-26fh-r34c-qxh6) (#3197 )	2026-10-18 13:07:33 -05:00
Graham Steffaniak	84afd8b0b7	fix(webdav): require Create permission for new PUT files (GHSA-8655-2ph3-q7q7) (#3196 )	2026-10-18 13:07:33 -05:00
Graham Steffaniak	78be5d8c0f	fix(preview): enforce scoped symlink resolution (GHSA-g2q5-r6ch-v25f) (#3195 )	2026-10-18 13:07:33 -05:00
Graham Steffaniak	5e29e1ee60	fix(auth): use rightmost X-Forwarded-For for client IP (GHSA-wjp8-g49g-xrhx) (#3191 )	2026-10-18 13:07:33 -05:00
Graham Steffaniak	367a7f019c	fix(tools): per-user duplicate finder cache (GHSA-4fhx-8pf6-5gmr) (#3190 )	2026-10-18 13:07:33 -05:00
Graham Steffaniak	fa9c094160	fix(view): block share view tokens on authenticated view route (GHSA-wxj5-g3qp-g732) (#3194 )	2026-10-18 13:07:33 -05:00
Graham Steffaniak	36a9a6dc49	fix(events): prevent SSE EventRouter concurrent map panic (GHSA-p9wm-f5jj-75pj) (#3189 )	2026-10-18 13:07:33 -05:00
Kevin B.andGraham Steffaniak	8fe6f1d5c3	Refactor Tooltip and generic to avoid v-html usage (GHSA-rmjp-pfrq-cc3v) (#3199 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-18 13:07:33 -05:00
JUSHUANGHUI LIandGraham Steffaniak	6dc3935c57	fix: preserve file permissions when saving edits (#3159 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-17 11:28:25 -05:00
Graham Steffaniak	5e73036657	fix(users): partial global permissions on API create (on top of #3171 ) (#3165 )	2026-10-17 11:24:46 -05:00
Jay HemnaniandGraham Steffaniak	e505900975	fix(activity): record uploads and deletes made through a share (#3166 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-17 11:24:46 -05:00
HawkForgeandGraham Steffaniak	26f320ee43	fix(settings): don't panic when config has no server map (#3176 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-16 16:23:41 -05:00
Kevin B.	184ae798c4	make listing highlight follow nextPrevious (#3156 )	2026-10-15 15:26:59 -05:00
Graham Steffaniak	7ae8bab062	fix scope issues for archive extraction (#3177 )	2026-10-15 15:26:59 -05:00
Graham Steffaniak	1af606e751	fix dev script	2026-10-15 15:26:59 -05:00
Graham Steffaniak	3683bc607c	fixed markdown screenshots (#3171 )	2026-10-15 15:26:59 -05:00
Som SamantrayandGraham Steffaniak	08d3e43c22	fix(auth): preserve admin source scope with createUserDir (#3125 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-15 15:26:59 -05:00
Kevin B.andGraham Steffaniak	d76f9373c4	Fix missing creation time and tiny font on md viewer code blocks (#3157 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-15 15:00:55 -05:00
Kevin B.andGraham Steffaniak	a72651e7aa	Add alphabetical order + pinned indicators to file tree (#3154 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-15 15:00:28 -05:00
Kevin B.andGraham Steffaniak	73d0b20821	Fix: vite warnings and restricted origin (#3155 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-15 15:00:00 -05:00
Anatolii PrylutskyiandGraham Steffaniak	3e447307f7	fix(frontend): hide write actions in read-only sources (#3149 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-14 18:50:09 -05:00
vulragrag-starandGraham Steffaniak	264cc81c41	fix(share): honor userDefaults singleClick for anonymous shares (#3147 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-14 18:46:13 -05:00
Graham Steffaniak	aa5b24119a	updated changelog	2026-10-14 16:07:31 -05:00
Graham Steffaniak	52cf624711	add file modify logging (#3152 )	2026-10-14 16:07:31 -05:00
Graham Steffaniak	5753f63970	updated webdav hardening (#3151 )	2026-10-14 16:07:31 -05:00
Jay HemnaniandGraham Steffaniak	8f1cf54cb0	fix(users): keep requested permissions when creating a user (#3130 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-14 16:07:31 -05:00
Paolo VallettaandGraham Steffaniak	a8cfcdd6eb	feat(webdav): chunked uploads for large files (rclone --owncloud-chunk-size) (#3112 ) Co-authored-by: Graham Steffaniak <42989099+gtsteffaniak@users.noreply.github.com>	2026-10-14 16:05:49 -05:00