Fix console errors: React Router v7 flags, form a11y, bans 500

- Add v7_startTransition and v7_relativeSplatPath future flags to
  BrowserRouter to silence React Router deprecation warnings
- Add hidden autocomplete='username' inputs to LoginPage and SetupPage
  so password managers and browsers stop warning about missing username
  fields in password forms
- Mount fail2ban-dev-config volume into backend container at /config:ro
  so ban_service can open the fail2ban SQLite database returned by
  'get dbfile'; this fixes the 500 on GET /api/dashboard/bans
- Track compose.debug.yml in git (was previously untracked)

Docker/compose.debug.yml

@@ -0,0 +1,123 @@
+# ──────────────────────────────────────────────────────────────
+#  BanGUI — Debug / Development Compose
+#
+#  Compatible with:
+#    docker compose -f Docker/compose.debug.yml up
+#    podman compose  -f Docker/compose.debug.yml up
+#    podman-compose  -f Docker/compose.debug.yml up
+#
+#  Features:
+#    - Source code mounted as volumes (hot-reload)
+#    - Uvicorn --reload for backend auto-restart
+#    - Vite dev server for frontend with HMR
+#    - Ports exposed on host for direct access
+#    - Debug log level enabled
+# ──────────────────────────────────────────────────────────────
+
+name: bangui-dev
+
+services:
+  # ── fail2ban ─────────────────────────────────────────────────
+  fail2ban:
+    image: lscr.io/linuxserver/fail2ban:latest
+    container_name: bangui-fail2ban-dev
+    restart: unless-stopped
+    cap_add:
+      - NET_ADMIN
+      - NET_RAW
+    network_mode: host
+    environment:
+      TZ: "${BANGUI_TIMEZONE:-UTC}"
+      PUID: 0
+      PGID: 0
+    volumes:
+      - fail2ban-dev-config:/config
+      - fail2ban-dev-run:/var/run/fail2ban
+      - /var/log:/var/log:ro
+    healthcheck:
+      test: ["CMD", "fail2ban-client", "ping"]
+      interval: 15s
+      timeout: 5s
+      start_period: 15s
+      retries: 3
+
+  # ── Backend (FastAPI + uvicorn with --reload) ───────────────
+  backend:
+    build:
+      context: ..
+      dockerfile: Docker/Dockerfile.backend
+      target: runtime
+    container_name: bangui-backend-dev
+    restart: unless-stopped
+    user: "0"
+    depends_on:
+      fail2ban:
+        condition: service_healthy
+    environment:
+      BANGUI_DATABASE_PATH: "/data/bangui.db"
+      BANGUI_FAIL2BAN_SOCKET: "/var/run/fail2ban/fail2ban.sock"
+      BANGUI_LOG_LEVEL: "debug"
+      BANGUI_SESSION_SECRET: "${BANGUI_SESSION_SECRET:-dev-secret-do-not-use-in-production}"
+      BANGUI_TIMEZONE: "${BANGUI_TIMEZONE:-UTC}"
+    volumes:
+      - ../backend/app:/app/app:z
+      - ../fail2ban-master:/app/fail2ban-master:ro,z
+      - bangui-dev-data:/data
+      - fail2ban-dev-run:/var/run/fail2ban:ro
+      - fail2ban-dev-config:/config:ro
+    ports:
+      - "${BANGUI_BACKEND_PORT:-8000}:8000"
+    command:
+      [
+        "uvicorn", "app.main:create_app", "--factory",
+        "--host", "0.0.0.0", "--port", "8000",
+        "--reload", "--reload-dir", "/app/app"
+      ]
+    healthcheck:
+      test: ["CMD-SHELL", "python -c 'import urllib.request; urllib.request.urlopen(\"http://127.0.0.1:8000/api/health\", timeout=4)'"]
+      interval: 15s
+      timeout: 5s
+      start_period: 45s
+      retries: 5
+    networks:
+      - bangui-dev-net
+
+  # ── Frontend (Vite dev server with HMR) ─────────────────────
+  frontend:
+    image: node:22-alpine
+    container_name: bangui-frontend-dev
+    restart: unless-stopped
+    working_dir: /app
+    environment:
+      NODE_ENV: development
+    volumes:
+      - ../frontend:/app:z
+      - frontend-node-modules:/app/node_modules
+    ports:
+      - "${BANGUI_FRONTEND_PORT:-5173}:5173"
+    command: ["sh", "-c", "npm install && npm run dev -- --host 0.0.0.0"]
+    depends_on:
+      backend:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "wget", "-qO", "/dev/null", "http://localhost:5173/"]
+      interval: 15s
+      timeout: 5s
+      start_period: 30s
+      retries: 5
+    networks:
+      - bangui-dev-net
+
+volumes:
+  bangui-dev-data:
+    driver: local
+  frontend-node-modules:
+    driver: local
+  fail2ban-dev-config:
+    driver: local
+  fail2ban-dev-run:
+    driver: local
+
+networks:
+  bangui-dev-net:
+    driver: bridge