docs: finalise Arma 3 UX enhancement plan and update project docs

- .claude/plan/arma3-ux-enhancement.md: full plan review pass
  - Add Progress Tracker table for session handoff
  - Fix Phase 1 field names to match ServerConfig model (password_admin,
    battleye, disable_von)
  - Fix Phase 2 rotation endpoints to use ServerService(db) inline pattern
  - Fix Phase 4 router/service: add get_by_slot() to PlayerRepository,
    add get_rcon_client() to ThreadRegistry, fix BanRepository.create()
    signature (expires_at not duration_minutes), correct router pattern
  - Fix Phase 6: already implemented, mark as SKIP
  - Fix CSS class names: btn-secondary→btn-ghost, input-base→neu-input
  - Add 19 implementation decisions from Q&A session to Coding Conventions
- CLAUDE.md: update status table, type mapping table, add plan summary
  and new endpoint list, add key implementation gotchas section
- frontend/README.md: replace Vite boilerplate with project README
- frontend/tests-e2e: E2E test improvements from previous session
  (mock-based login error test, full dashboard mock coverage)

frontend/README.md

@@ -1,73 +1,72 @@
-# React + TypeScript + Vite
+# Languard Server Manager — Frontend
 
-This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+React 19 + TypeScript + Vite frontend for the Languard game server management panel.
 
-Currently, two official plugins are available:
+## Stack
 
-- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Oxc](https://oxc.rs)
-- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/)
+- **React 19** with hooks
+- **TypeScript** strict mode
+- **Vite** dev server + build
+- **TanStack Query** for server state (all API calls)
+- **Zustand** for client state (auth, UI notifications)
+- **react-hook-form + Zod** for form validation
+- **Tailwind CSS** with custom neumorphic design tokens
+- **Vitest** for unit tests
 
-## React Compiler
+## Dev Server
 
-The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
-
-## Expanding the ESLint configuration
-
-If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
-
-```js
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
-
-      // Remove tseslint.configs.recommended and replace with this
-      tseslint.configs.recommendedTypeChecked,
-      // Alternatively, use this for stricter rules
-      tseslint.configs.strictTypeChecked,
-      // Optionally, add this for stylistic rules
-      tseslint.configs.stylisticTypeChecked,
-
-      // Other configs...
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
+```bash
+# From this directory
+npx vite --host
+# → http://localhost:5173
 ```
 
-You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+## Tests
 
-```js
-// eslint.config.js
-import reactX from 'eslint-plugin-react-x'
-import reactDom from 'eslint-plugin-react-dom'
-
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
-      // Enable lint rules for React
-      reactX.configs['recommended-typescript'],
-      // Enable lint rules for React DOM
-      reactDom.configs.recommended,
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
+```bash
+npx vitest run          # run once
+npx vitest              # watch mode
+npx tsc --noEmit        # type check only
 ```
+
+## Project Structure
+
+```
+src/
+├── components/
+│   ├── layout/         # Sidebar
+│   ├── servers/        # ServerCard, ConfigEditor, PlayerTable, MissionList, ModList, LogViewer, BanTable
+│   ├── settings/       # PasswordChange, UserManager
+│   └── ui/             # StatusLed, (planned) TagListEditor, ConfirmModal
+├── hooks/
+│   ├── useServers.ts       # Dashboard server list + start/stop/restart mutations
+│   ├── useServerDetail.ts  # All per-server queries and mutations
+│   ├── useAuth.ts
+│   └── useWebSocket.ts     # Real-time events (logs, status changes)
+├── pages/
+│   ├── LoginPage.tsx
+│   ├── DashboardPage.tsx
+│   ├── ServerDetailPage.tsx
+│   ├── CreateServerPage.tsx
+│   └── SettingsPage.tsx
+├── store/
+│   ├── auth.store.ts   # JWT + user role
+│   └── ui.store.ts     # Notification queue
+└── lib/
+    ├── api.ts          # Axios instance with JWT interceptor + 401 redirect
+    └── logger.ts
+```
+
+## CSS Conventions
+
+Custom utility classes defined in `src/index.css` (do not add new CSS files):
+
+| Class | Use |
+|-------|-----|
+| `neu-card` | Card surface with neumorphic raised shadow |
+| `neu-input` | Input with recessed shadow |
+| `btn-primary` | Amber accent button |
+| `btn-ghost` | Text-only button with hover background |
+| `btn-danger` | Red destructive button |
+
+Tailwind design tokens in `tailwind.config.js`: `surface-{base,raised,recessed,overlay}`, `text-{primary,secondary,muted}`, `status-{running,stopped,crashed,starting,restarting}`, `accent`.