docs: update root .md files to reflect current frontend state and planned UX enhancements

- ARCHITECTURE.md: fix diagram (Server Detail was "planned", now complete), expand
  frontend directory listing with all 5 pages, all server components, all hooks
- FRONTEND.md: note planned terrain/display_name/workshop_id fields on Mission/Mod
  types; add planned hooks table for Phases 1-5 of UX enhancement plan
- MODULES.md: annotate PlayerRepository with get_by_slot() and ThreadRegistry with
  get_rcon_client() as planned additions in Phase 4
- API.md: add "Upcoming Endpoints" section documenting all planned routes for
  Phases 1-5 of the UX enhancement plan
- README.md: update unit test count (69 → ~120), update frontend structure comment
  to list all current pages/components/hooks

README.md

@@ -20,7 +20,7 @@ A multi-game server management platform with a Python/FastAPI backend and React/
 - **Zustand 5** — client state (auth, UI)
 - **Tailwind CSS** — dark neumorphic design system
 - **Playwright** — E2E testing (23 tests)
-- **Vitest** + **React Testing Library** — unit tests (69 tests)
+- **Vitest** + **React Testing Library** — unit tests (~120 tests)
 
 ## Quick Start
 
@@ -96,12 +96,12 @@ languard-servers-manager/
 ├── frontend/
 │   ├── src/
 │   │   ├── App.tsx              # Router + auth guard
-│   │   ├── pages/               # LoginPage, DashboardPage
-│   │   ├── components/         # Sidebar, ServerCard, StatusLed
-│   │   ├── hooks/               # useServers, useWebSocket
+│   │   ├── pages/               # LoginPage, DashboardPage, ServerDetailPage, CreateServerPage, SettingsPage
+│   │   ├── components/         # Sidebar, ServerCard, ConfigEditor, PlayerTable, BanTable, MissionList, ModList, LogViewer, StatusLed
+│   │   ├── hooks/               # useServers, useServerDetail, useAuth, useGames, useWebSocket
 │   │   ├── store/               # auth.store, ui.store (Zustand)
 │   │   ├── lib/                 # api.ts (Axios client)
-│   │   └── __tests__/          # Vitest unit tests
+│   │   └── __tests__/          # Vitest unit tests (~120 tests)
 │   ├── tests-e2e/               # Playwright E2E tests
 │   └── playwright.config.ts
 ├── API.md                       # REST + WebSocket API reference