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

ARCHITECTURE.md

@@ -30,7 +30,8 @@ Arma 3 is the first-class, built-in adapter. Adding a new game server type requi
 ```
 +--------------------------------------------------------------+
 |                     React Frontend (SPA)                      |
-|  Dashboard | Login | Server List | Server Detail (planned)   |
+|  Login | Dashboard | Server Detail (7 tabs) | Create Server  |
+|  Settings | (all routes complete)                            |
 +------------------------------+-------------------------------+
                                |  HTTP REST + WebSocket (/ws)
                                v
@@ -712,22 +713,38 @@ frontend/
     pages/
       LoginPage.tsx            # Login form (react-hook-form + zod validation)
       DashboardPage.tsx        # Server dashboard with ServerCard grid
+      ServerDetailPage.tsx     # 7-tab detail page (overview, config, players, bans, missions, mods, logs)
+      CreateServerPage.tsx     # 4-step wizard (admin only)
+      SettingsPage.tsx         # Password change + admin user management
     components/
       layout/
         Sidebar.tsx             # Sidebar navigation
       servers/
         ServerCard.tsx          # Server status card with lifecycle buttons
+        ServerHeader.tsx        # Server name, status, stats, lifecycle buttons
+        ConfigEditor.tsx        # Tabbed config editor with optimistic locking
+        PlayerTable.tsx         # Current players + history with search
+        BanTable.tsx            # Ban list + create/revoke form
+        MissionList.tsx         # Mission list + .pbo upload/delete
+        ModList.tsx             # Mod list with enable/disable checkboxes
+        LogViewer.tsx           # Log display with level filter (props-driven)
+      settings/
+        PasswordChange.tsx      # Password change form
+        UserManager.tsx         # User CRUD table (admin only)
       ui/
         StatusLed.tsx           # Status LED indicator component
     hooks/
       useServers.ts            # TanStack Query hooks for server CRUD + lifecycle
+      useServerDetail.ts       # Config, players, bans, missions, mods, RCon hooks
+      useAuth.ts               # Auth management hooks (users, password, logout)
+      useGames.ts              # Game type hooks (list, detail, schema, defaults)
       useWebSocket.ts          # WebSocket hook with exponential backoff reconnect
     store/
       auth.store.ts            # Zustand auth store (persisted to localStorage)
       ui.store.ts              # Zustand UI store (sidebar, notifications)
     lib/
       api.ts                   # Axios client with auth interceptors
-    __tests__/                  # 12 unit test files (Vitest)
+    __tests__/                  # 14 unit test files (~120 tests, Vitest)
   tests-e2e/
     auth/
       login.spec.ts            # Login E2E test