feat: auto-route room_id 1 to local fake_room.py for testing

- When room_id == 1, server/main automatically patch blivedm to connect
  to fake_room.py on 127.0.0.1:8081 (bot web UI port + 1)
- Any other room id restores real Bilibili (unpatch)
- fake_room.py (gitignored, not packaged): headless fake live room with
  bilibili-compatible init APIs (/x/web-interface/nav, /room/v1/Room/get_info,
  /xlive/web-room/v1/index/getDanmuInfo) and WS /sub protocol (AUTH/HEARTBEAT/
  SEND_MSG_REPLY), plus stdin/HTTP /emit control for danmaku/gift/blind box/
  guard/super chat/enter/follow
- Verified end-to-end: all events flow through blivedm and render rules
  (gift -> 感谢由Baka投喂的小电视, blind box, guard, super chat, custom
  danmaku template, enter room)

main.py

@@ -33,6 +33,8 @@ def parse_args() -> argparse.Namespace:
     parser.add_argument("--no-numbers", action="store_true")
     parser.add_argument("--list-devices", action="store_true")
     parser.add_argument("--debug", "-d", action="store_true")
+    parser.add_argument("--fake-room", type=int, default=0, metavar="PORT",
+                        help="connect to local fake_room.py instead of real Bilibili (dev/testing only)")
     return parser.parse_args()
 
 
@@ -58,6 +60,17 @@ async def tts_worker(queue: asyncio.Queue, bridge: TTSBridge,
 
 
 async def main_async(args: argparse.Namespace) -> int:
+    if args.fake_room:
+        import importlib
+        fake = importlib.import_module("fake_room")
+        fake.patch_blivedm(args.fake_room)
+        logger.info("[dev] connected to fake room on port %d", args.fake_room)
+    elif args.room_id == 1:
+        import importlib
+        fake = importlib.import_module("fake_room")
+        fake.patch_blivedm(8081)
+        logger.info("[dev] room 1 -> fake room on port 8081")
+
     if args.list_devices:
         devices = get_output_devices()
         print("Available audio output devices:")