feat: implement full backend + frontend server detail, settings, and create server pages

Backend:
- Complete FastAPI backend with 42+ REST endpoints (auth, servers, config,
  players, bans, missions, mods, games, system)
- Game adapter architecture with Arma 3 as first-class adapter
- WebSocket real-time events for status, metrics, logs, players
- Background thread system (process monitor, metrics, log tail, RCon poller)
- Fernet encryption for sensitive config fields at rest
- JWT auth with admin/viewer roles, bcrypt password hashing
- SQLite with WAL mode, parameterized queries, migration system
- APScheduler cleanup jobs for logs, metrics, events

Frontend:
- Server Detail page with 7 tabs (overview, config, players, bans,
  missions, mods, logs)
- Settings page with password change and admin user management
- Create Server wizard (4-step; known bug: silent validation failure)
- New hooks: useServerDetail, useAuth, useGames
- New components: ServerHeader, ConfigEditor, PlayerTable, BanTable,
  MissionList, ModList, LogViewer, PasswordChange, UserManager
- WebSocket onEvent callback for real-time log accumulation
- 120 unit tests passing (Vitest + React Testing Library)

Docs:
- Added .gitignore, CLAUDE.md, README.md
- Updated FRONTEND.md, ARCHITECTURE.md with current implementation state
- Added .env.example for backend configuration

Known issues:
- Create Server form: "Next" buttons don't validate before advancing,
  causing silent submit failure when fields are invalid
- Config sub-tabs need UX redesign for non-technical users

backend/core/dal/ban_repository.py

@@ -0,0 +1,52 @@
+import json
+from datetime import datetime, timezone
+from core.dal.base_repository import BaseRepository
+
+
+class BanRepository(BaseRepository):
+
+    def get_all(self, server_id: int, active_only: bool = True) -> list[dict]:
+        if active_only:
+            return self._fetchall(
+                "SELECT * FROM bans WHERE server_id = :sid AND is_active = 1 ORDER BY banned_at DESC",
+                {"sid": server_id},
+            )
+        return self._fetchall(
+            "SELECT * FROM bans WHERE server_id = :sid ORDER BY banned_at DESC",
+            {"sid": server_id},
+        )
+
+    def create(
+        self,
+        server_id: int,
+        guid: str | None,
+        name: str | None,
+        reason: str | None,
+        banned_by: str,
+        expires_at: str | None = None,
+        game_data: dict | None = None,
+    ) -> int:
+        return self._lastrowid(
+            """
+            INSERT INTO bans (server_id, guid, name, reason, banned_by, expires_at, game_data)
+            VALUES (:sid, :guid, :name, :reason, :by, :exp, :gd)
+            """,
+            {
+                "sid": server_id,
+                "guid": guid,
+                "name": name,
+                "reason": reason,
+                "by": banned_by,
+                "exp": expires_at,
+                "gd": json.dumps(game_data or {}),
+            },
+        )
+
+    def deactivate(self, ban_id: int) -> None:
+        self._execute(
+            "UPDATE bans SET is_active = 0 WHERE id = :id",
+            {"id": ban_id},
+        )
+
+    def get_by_id(self, ban_id: int) -> dict | None:
+        return self._fetchone("SELECT * FROM bans WHERE id = :id", {"id": ban_id})