Business-Management/frontend/CLAUDE.md

# frontend — Claude context

React 18 SPA built with Vite, port 5173 dev / 80 prod, served by nginx-unprivileged in production. All `/api/*` requests are proxied to `backend:8000`. See root `CLAUDE.md` for architecture, Docker, and project-wide workflows.

---

## Commands

All commands run inside Docker — never on the host.

```bash
docker compose exec frontend npm run typecheck
docker compose exec frontend npm run lint
```

---

## File & Folder Tree

```
frontend/
├── src/
│   ├── main.tsx                       ← React root, QueryClientProvider, BrowserRouter
│   ├── App.tsx                        ← Route tree, PrivateRoute, AdminRoute
│   ├── api/client.ts                  ← Native fetch wrapper (`request()`) + ALL API functions (single source of truth); no Axios
│   ├── hooks/
│   │   ├── useAuth.ts                 ← Token state (localStorage), login/logout
│   │   └── useTheme.ts                ← Theme toggle
│   ├── components/
│   │   ├── AppShell.tsx               ← Layout: Sidebar + SourcePanel (on /apps/documents) + main
│   │   ├── Sidebar.tsx                ← Collapsible nav (icons ↔ icons+labels)
│   │   ├── SourcePanel.tsx            ← Views + searchable category tree (docs route only)
│   │   ├── ManageCategoriesDialog.tsx ← Category CRUD modal (rename, delete)
│   │   ├── DocumentSlideOver.tsx      ← Right slide-over: detail, edit, share, AI suggestions
│   │   ├── ThemeToggle.tsx            ← Light/dark mode toggle
│   │   ├── PluginSchemaForm.tsx       ← JSON Schema → React form (boolean/string/number/readOnly)
│   │   └── ui/                        ← shadcn/ui components (Button, Input, …)
│   ├── pages/                         ← One file per route
│   │   ├── DocServiceSettingsPage.tsx ← Combined doc-service settings: upload limits + watch directory
│   │   └── PluginSettingsPage.tsx     ← Generic plugin settings page driven by manifest
│   ├── lib/utils.ts                   ← cn() = clsx + tailwind-merge
│   └── styles/theme.css               ← CSS custom properties, Tailwind setup
├── vite.config.ts                     ← /api/* proxied to backend:8000
├── tailwind.config.ts
├── components.json                    ← shadcn/ui config
├── Dockerfile                         ← Multi-stage: Node build → nginx-unprivileged
└── STATUS.md
```

---

## Frontend Routes

| Path | Component | Guard |
|------|-----------|-------|
| `/login` | `LoginPage` | Public |
| `/` | `DashboardPage` | PrivateRoute |
| `/apps` | `AppsPage` | PrivateRoute |
| `/apps/documents` | `DocumentsPage` | PrivateRoute |
| `/apps/documents/settings` | `DocServiceSettingsPage` | ServiceAdminRoute (is_admin OR doc-service-admin member) |
| `/apps/ai/settings` | `AIAdminSettingsPage` | ServiceAdminRoute (is_admin OR ai-service-admin member) |
| `/profile` | `ProfilePage` | PrivateRoute |
| `/settings` | `SettingsPage` | PrivateRoute |
| `/settings/plugins/:id` | `PluginSettingsPage` | PrivateRoute (auth enforced per-plugin by backend) |
| `/admin` | `AdminPage` (→ `/admin/users`) | AdminRoute |
| `/admin/users` | `AdminUsersPage` | AdminRoute |
| `/admin/groups` | `AdminGroupsPage` | AdminRoute |
| `/admin/appearance` | `AdminAppearancePage` | AdminRoute |
| `*` | redirect to `/` | — |

`PrivateRoute` — checks `token` from `useAuth`, redirects to `/login` if absent.
`AdminRoute` — checks token AND queries `GET /api/users/me` for `is_admin`; waits for query to avoid flash; redirects to `/login` (not `/`) if not admin.

---

## Security Standards

### XSS prevention

- React JSX text interpolation (`{value}`) is HTML-escaped by the DOM renderer — **never** use `dangerouslySetInnerHTML` with user-supplied content.
- Server-side `sanitize_str` provides defense-in-depth (control char stripping, max length).

---

## Frontend Patterns & Conventions

### API client (`src/api/client.ts`)

**No Axios** — uses a thin native `fetch` wrapper. All API calls live here, nowhere else.

The core `request()` function handles:
- Prepends `/api` base URL
- Injects `Authorization: Bearer {token}` from `localStorage` on every request
- **Global 401 handler**: clears `localStorage` token and redirects to `/login` via `window.location.href` — this is the expired-session redirect
- Throws `ApiError(status, detail)` on non-2xx responses (detail parsed from JSON body)
- Returns `undefined` on 204 No Content
- Supports `blob: true` for file download/preview responses

```typescript
// The internal api object — use these methods in exported functions:
api.get<T>(path, params?)          // GET with optional query params object
api.post<T>(path, json?)           // POST with JSON body
api.postForm<T>(path, URLSearchParams)  // POST with form-encoded body (login)
api.postFile<T>(path, FormData)    // POST with multipart body (file upload)
api.patch<T>(path, json?)          // PATCH with JSON body
api.delete<T>(path)                // DELETE
api.getBlob(path)                  // GET → Blob (download / view)
```

Adding a new API call:
1. Define a TypeScript interface for the response if it's new.
2. Add a named export function (`getX`, `createX`, `updateX`, `deleteX`).
3. Use the appropriate `api.*` method — return the promise directly (no `.then((r) => r.data)`).

Error handling in components: catch blocks receive an `ApiError` instance with `.status` and `.message` (the detail string).

### TanStack Query conventions

**Query keys** (flat arrays, lowercase):
```typescript
["me"]                    // current user
["services"]              // service health list
["dashboard-prefs"]       // user dashboard preferences
["categories"]            // document categories
["documents", params]     // document list (params object for cache isolation)
["documents-shared", params] // shared-with-me list
["document", id]          // single document
["document-shares", id]   // share list for a specific document
["my-groups"]             // current user's group memberships (for share picker)
["plugins"]               // accessible plugin list (filtered by user access)
["plugin-manifest", id]   // plugin manifest (cached)
["plugin-settings", id]   // plugin current settings
```

**Mutation pattern**:
```typescript
const mutation = useMutation({
  mutationFn: apiFunction,
  onSuccess: () => {
    queryClient.invalidateQueries({ queryKey: ["affected-key"] });
    // additional side effects (close dialog, reset form, etc.)
  },
});
// Usage:
mutation.mutate(data);
mutation.isPending  // show spinner / disable button
mutation.isError    // show error message
```

**Polling**:
```typescript
useQuery({ queryKey: ["services"], queryFn: getServices,
  refetchInterval: 30_000, refetchIntervalInBackground: true });
```

### Route guards

```typescript
// PrivateRoute — redirect to /login if no token
// AdminRoute   — redirect to /login if no token OR not admin
//   (waits for getMe() query to avoid flash; uses 404 semantics)
```

### Component patterns

- Functional components only.
- Local `useState` for UI-only state (edit mode, pending values, open/closed).
- Server state via `useQuery` / `useMutation` — no duplicated local copies.
- `cn()` from `lib/utils.ts` for conditional Tailwind classes.
- `lucide-react` for all icons.
- Never use `dangerouslySetInnerHTML` with user-supplied content.

---

## Naming & Code Conventions

- TypeScript strict mode — no `any`.
- API response types inferred from interfaces in `client.ts` only.
- Error messages displayed inline (no alert); loading shown as disabled state or "…" text.
- All user-facing text: safe via React JSX rendering (not innerHTML).

---

## Default Values & Limits

| Parameter | Value | Location |
|-----------|-------|----------|
| Token localStorage key | `"token"` | `useAuth.ts` |