feat: per-user approval settings and content item deletion

[iabouhashish]

Summary

Per-user Settings (My Settings tab)

• New "My Settings" tab in the Settings page — users can override the global approval gate for their own jobs
• Toggle between on/off/default with a "Reset to global default" button when an override is active
• Shows a loading skeleton during fetch, disables controls while saving, shows error/success toasts

Content Item Deletion

• Uploaded content items in the Content Library now show a delete icon button
• Clicking opens a confirmation dialog before permanently removing the item via the API
• Only visible for items with extractable UUID file IDs; scraped/synced content is unaffected

Under the hood

• New TypeScript types: UserSettings, UserSettingsResponse
• New API methods: getUserSettings, updateUserSettings, deleteContentItem
• New hooks: useUserSettings, useUpdateUserSettings, useDeleteContentItem

Test Coverage

CODE PATH COVERAGE
═══════════════════════════════
API methods (3/3):
  [★★★ TESTED] getUserSettings — api.test.ts
  [★★★ TESTED] updateUserSettings — api.test.ts
  [★★★ TESTED] deleteContentItem — api.test.ts

Hooks (6/6):
  [★★★ TESTED] useUserSettings (calls API, retry:false) — useUserSettingsAndContent.test.ts
  [★★★ TESTED] useUpdateUserSettings (calls API, invalidates query, error path) — useUserSettingsAndContent.test.ts
  [★★★ TESTED] useDeleteContentItem (calls API, invalidates content-sources, error path) — useUserSettingsAndContent.test.ts

Coverage gate: PASS (~77%)

Tests: 54 → 68 (+14 new across 2 files)

Pre-Landing Review

4 issues found, all auto-fixed:

• content-list.tsx:50 — typo /release_notess/ → /release_notes/ (would never match)
• settings/page.tsx:109 — removed non-functional indeterminate prop from MUI Switch
• content-list.tsx:34 — UUID regex /i flag removed (enforces lowercase, prevents 404s on case-sensitive storage)
• content-list.tsx:121 — silent catch block → showErrorToast('Failed to delete item')

Design Review

Frontend files changed — design review (lite) applied. Findings:

• Colors match design system (#E8A238 hover, #C45C3B sienna for destructive, #1A1713 dialog background, Instrument Serif for dialog title, Geist for body)
• No issues found.

Greptile Review

No Greptile comments.

Plan Completion

No plan file detected.

Verification Results

No dev server detected — skipping plan verification.

Test plan

• All Jest tests pass (12 suites, 68 tests)
• Verify "My Settings" tab appears in Settings page
• Verify approval toggle saves and resets correctly
• Verify delete button appears on uploaded content items
• Verify delete confirmation dialog works (cancel + confirm)
• Verify error toast appears when delete fails

🤖 Generated with Claude Code