# T08c: Frontend Mail UI + Global Search UI — Implementation Briefing

## Task
Implement frontend UI for Mail plugin (folder tree, mail list, reading pane, compose, templates, signatures, rules, labels, PGP, vacation, shared mailbox, delegates) and enhance Global Search UI with tabs.

## Acceptance Criteria (17 ACs — skip AC1/DMS and AC16/Docker, already done)
2. Mail route /mail renders folder tree + mail list + reading pane
3. Mail: click folder → mail list updates with folder mails
4. Mail: click mail → detail with sanitized HTML body + attachments
5. Mail: compose button → editor with toolbar (bold, italic, link, template insert)
6. Mail: reply/forward buttons → compose pre-filled
7. Mail: template picker dropdown in compose → inserts template body
8. Mail: signature manager in settings → create/edit/delete signatures
9. Mail: rule editor → condition builder + action selector
10. Mail: label manager → create labels with colors, assign to mails
11. Mail: PGP settings → import private key, view contact public keys
12. Mail: vacation responder toggle → date range + auto-reply text
13. Mail: shared mailbox selector → switch between personal+shared accounts
14. Mail: attachment download → file stream downloaded
15. Mail: create event from mail → calendar event modal pre-filled
16. Global search results page → tabs for companies/contacts/mails/files/events
17. Global search autocomplete in TopBar → dropdown with suggestions

## Backend API Endpoints (all implemented, prefix /api/v1/mail)
### Accounts
- GET /accounts — list accounts (password never returned)
- POST /accounts — create account (AES-256 encrypted password)
- PATCH /accounts/{id} — update account
- DELETE /accounts/{id} — delete account
- GET /accounts/shared — list shared mailboxes
- POST /accounts/{id}/users — assign shared mailbox users
- POST /accounts/{id}/delegates — create delegate access
- POST /accounts/{id}/send-permissions — grant send permission
- POST /accounts/{id}/test-connection — test IMAP connection
- POST /accounts/{id}/sync — trigger IMAP sync

### Folders
- GET /folders?account_id=X — list folders with counts
- POST /folders — create folder
- PATCH /folders/{id} — rename folder
- DELETE /folders/{id} — delete folder

### Mails
- GET /?folder_id=X&page=1 — paginated mail list
- GET /{id} — mail detail (sanitized HTML, attachments)
- POST /send — send mail via SMTP
- POST /{id}/reply — reply with In-Reply-To
- POST /{id}/forward — forward mail
- PATCH /{id}/flags — toggle seen/flagged
- POST /{id}/link — link to contact/company
- POST /{id}/create-event — create calendar event from mail
- POST /{id}/labels — assign label to mail

### Search & Threads
- GET /search?q=text — FTS search
- GET /threads — threaded view

### Attachments
- GET /{mail_id}/attachments/{att_id} — file stream download

### Templates
- POST /templates — create template
- GET /templates — list templates
- POST /templates/substitute — substitute variables

### Signatures
- POST /signatures — create signature
- GET /signatures — list signatures

### Rules
- POST /rules — create rule (conditions + actions)
- GET /rules — list rules sorted by priority
- DELETE /rules/{id} — delete rule

### Vacation
- POST /vacation — configure auto-reply
- POST /vacation/test-dedup — test dedup

### PGP
- POST /pgp/keys — import private key (encrypted)
- GET /pgp/keys — list PGP keys
- POST /pgp/encrypt — encrypt message
- POST /contacts/{contact_id}/pgp-key — store contact public key

### Labels
- POST /labels — create label (with color)
- GET /labels — list labels

## Frontend Architecture (follow existing patterns)
- **Framework:** React + TypeScript + Vite
- **Routing:** react-router-dom (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 or src/api/dms.ts
- **UI components:** src/components/ui/ (Button, Card, Input, Modal, Table, Badge, etc.)
- **Shared:** src/components/shared/ (DataGrid, SearchDropdown, Tabs)
- **Layout:** src/components/layout/AppShell.tsx + Sidebar.tsx
- **i18n:** src/i18n/ (add de.json + en.json keys for Mail)
- **Existing search page:** src/pages/GlobalSearchResults.tsx (enhance with tabs)

## Files to Create
- `src/api/mail.ts` — Mail API client (types + functions for all endpoints)
- `src/pages/Mail.tsx` — Mail page (folder tree + mail list + reading pane)
- `src/pages/MailSettings.tsx` — Mail settings (signatures, rules, PGP, vacation, labels)
- `src/components/mail/MailFolderTree.tsx` — folder tree sidebar
- `src/components/mail/MailList.tsx` — mail list with pagination
- `src/components/mail/MailDetail.tsx` — reading pane (sanitized HTML, attachments)
- `src/components/mail/ComposeModal.tsx` — compose editor (bold/italic/link/template)
- `src/components/mail/TemplatePicker.tsx` — template dropdown
- `src/components/mail/SignatureManager.tsx` — signature CRUD
- `src/components/mail/RuleEditor.tsx` — rule condition builder + action selector
- `src/components/mail/LabelManager.tsx` — label CRUD with colors
- `src/components/mail/VacationResponder.tsx` — vacation toggle + date range
- `src/components/mail/PgpSettings.tsx` — PGP key import + contact keys
- `src/components/mail/SharedMailboxSelector.tsx` — account switcher
- `src/components/mail/MailSearchBar.tsx` — mail search input
- `src/__tests__/mail/MailPage.test.tsx` — mail page tests
- `src/__tests__/mail/ComposeModal.test.tsx` — compose tests
- `src/__tests__/mail/MailSettings.test.tsx` — settings tests
- `src/__tests__/search/GlobalSearchTabs.test.tsx` — search tabs tests

## Files to Modify
- `src/routes/index.tsx` — Add /mail, /mail/settings routes
- `src/components/layout/Sidebar.tsx` — Add Mail nav link
- `src/pages/GlobalSearchResults.tsx` — Add tabs (companies/contacts/mails/files/events)
- `src/components/layout/AppShell.tsx` — Add search autocomplete in TopBar
- `src/i18n/locales/de.json` — Mail translations
- `src/i18n/locales/en.json` — Mail translations

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

## 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
- No dangerouslySetInnerHTML without sanitization check

## Estimated Size
- ~700 lines code (pages + components + API client)
- ~350+ lines tests
