# T08a: Frontend DMS + Tags + Permissions UI — Implementation Briefing

## Task
Implement frontend UI for DMS plugin (file browser, upload, preview, share, trash), Tags UI (assign, bulk, tag cloud), and Permissions UI (share links, permission display).

## Requirements
- F-DMS-01–07: DMS file browser, folder tree, upload, preview, share, trash, search
- F-FILEUI-01–06: File UI components (dropzone, preview modal, share dialog, bulk actions, trash view)
- F-TAG-01–04: Tags UI (assign, bulk assign, tag cloud, tag picker)
- F-PERM-03–05: Permissions UI (share links, permission display)
- F-LINK-01–05: Entity links UI

## Acceptance Criteria (12 ACs)
1. DMS route /dms renders file browser with folder tree + file grid
2. DMS upload: drag file to dropzone → upload progress → file appears in list
3. DMS file preview modal opens with PDF.js for PDF files
4. DMS share dialog: select user/group, set permission, share created
5. DMS public share link: copy button generates URL, optional password+expiry fields
6. DMS bulk select → bulk-move or bulk-delete actions appear
7. DMS trash view: deleted files list, restore button per file
8. Mail: shared mailbox selector (DO NOT IMPLEMENT — belongs to T08c)
9. Tags: tag picker on company/contact detail → assign/unassign
10. Tags: bulk select entities → bulk-tag dialog
11. Plugin deactivate → plugin route+menu-item disappear from SPA
12. Plugin activate → plugin route+menu-item appear in SPA

## Backend API Endpoints (already implemented)
### DMS (/api/v1/dms)
- GET /folders — list folder tree
- POST /folders — create folder
- PATCH /folders/{id} — rename/move folder
- DELETE /folders/{id} — delete folder
- POST /files/upload — upload file (multipart)
- GET /files/{id} — get file detail
- PATCH /files/{id} — update file (rename/move)
- DELETE /files/{id} — soft-delete file
- POST /files/{id}/restore — restore from trash
- GET /files/{id}/preview — stream file for preview
- POST /files/{id}/edit-session — create OnlyOffice edit session
- POST /files/{id}/share — share file with user/group
- DELETE /files/{id}/share — remove share
- GET /search?q=text — search files
- GET /shared-with-me — files shared with current user
- POST /files/bulk-move — bulk move files
- POST /files/bulk-delete — bulk delete files

### Tags (/api/v1/tags)
- GET / — list tags
- POST / — create tag
- PATCH /{id} — update tag
- DELETE /{id} — delete tag
- POST /assign — assign tag to entity
- DELETE /assign — unassign tag
- POST /bulk-assign — bulk assign tags
- GET /{id}/entities — list entities for tag

### Permissions (/api/v1/permissions)
- GET /files/{id}/permissions — list permissions
- POST /files/{id}/permissions — grant permission
- DELETE /files/{id}/permissions/{user_id} — revoke permission
- POST /files/{id}/share-link — create public share link
- DELETE /share-links/{id} — revoke share link

## Frontend Architecture (follow existing patterns)
- **Framework:** React + TypeScript + Vite
- **Routing:** react-router-dom (createBrowserRouter, see src/routes/index.tsx)
- **State:** TanStack Query (useQuery/useMutation)
- **HTTP:** axios via src/api/client.ts (apiClient, baseURL /api/v1)
- **API pattern:** See src/api/calendar.ts for plugin API client example
- **UI components:** src/components/ui/ (Button, Card, Input, Modal, Table, Badge, ConfirmDialog, EmptyState, Pagination, Select, Skeleton, Toast)
- **Shared components:** src/components/shared/ (DataGrid, SearchDropdown, Tabs, ActivityFeed)
- **Store:** src/store/ (authStore, uiStore)
- **Layout:** src/components/layout/AppShell (sidebar + main area)
- **i18n:** src/i18n/ (add de.json + en.json keys for DMS/Tags)

## Files to Create
- `src/api/dms.ts` — DMS API client (types + functions)
- `src/api/tags.ts` — Tags API client
- `src/api/permissions.ts` — Permissions API client
- `src/pages/Dms.tsx` — DMS file browser page (folder tree + file grid)
- `src/pages/DmsTrash.tsx` — DMS trash view
- `src/components/dms/FolderTree.tsx` — folder tree sidebar
- `src/components/dms/FileGrid.tsx` — file grid with icons
- `src/components/dms/UploadDropzone.tsx` — drag-drop upload
- `src/components/dms/FilePreviewModal.tsx` — file preview modal
- `src/components/dms/ShareDialog.tsx` — share dialog
- `src/components/dms/BulkActions.tsx` — bulk select actions
- `src/components/tags/TagPicker.tsx` — tag assign/unassign picker
- `src/components/tags/TagCloud.tsx` — tag cloud display
- `src/components/tags/BulkTagDialog.tsx` — bulk tag assignment dialog
- `src/__tests__/dms/DmsPage.test.tsx` — DMS page tests
- `src/__tests__/dms/UploadDropzone.test.tsx` — upload tests
- `src/__tests__/tags/TagPicker.test.tsx` — tag picker tests
- `src/__tests__/tags/BulkTagDialog.test.tsx` — bulk tag tests
- `src/__tests__/permissions/ShareDialog.test.tsx` — share dialog tests

## Files to Modify
- `src/routes/index.tsx` — Add /dms, /dms/trash routes
- `src/components/layout/AppShell.tsx` — Add DMS + Tags menu items to sidebar
- `src/pages/CompanyDetail.tsx` — Add TagPicker component
- `src/pages/ContactDetail.tsx` — Add TagPicker component
- `src/i18n/locales/de.json` — Add DMS/Tags translations
- `src/i18n/locales/en.json` — Add DMS/Tags translations

## Test Spec
- Run: `cd /a0/usr/workdir/dev-projects/leocrm/frontend && npx vitest run src/__tests__/dms/ src/__tests__/tags/ src/__tests__/permissions/ --reporter=verbose`
- Coverage: `npx vitest run src/__tests__/dms/ src/__tests__/tags/ --coverage`
- Build: `npx vite build`
- Type check: `npx tsc --noEmit`
- Coverage target: 80%
- Follow existing test pattern from src/__tests__/companies/ or src/__tests__/calendar/

## Forbidden Patterns
- No inline styles — use Tailwind classes
- No any types — use proper TypeScript interfaces
- No direct fetch() — use apiClient from src/api/client.ts
- No hardcoded strings — use i18n (t() function)
- No Lorem Ipsum — use realistic test data
- No missing loading/error/empty states

## Estimated Size
- ~600 lines code (pages + components + API clients)
- ~300+ lines tests
