Original prompt: 请你参照uno.html，修改为可以部署在huggingface上并支持多人对战的游戏，要求可以支持抢出相同牌的规则，并支持3-15人在线对战。另外，前端的风格和动画不要改变，不要修改已有的文件。

Implementation notes:
- Existing `uno.html` must remain unchanged.
- Add a new FastAPI/WebSocket/Docker multiplayer implementation beside it.
- Use `uno.html` as visual/CSS reference and serve/extract its CSS where practical.
- Confirmed jump-in rule: strict same card, meaning same color and same value/type.
- Confirmed room flow: room code.
- Confirmed bots: host can add bots, and bots also participate in jump-in.
- Implemented FastAPI/WebSocket backend, new multiplayer frontend, Docker/Space files, and tests.
- Local verification passed: `pytest -q` reports 13 passed; `python -m py_compile app.py` passed.
- Playwright manual smoke checks covered room creation, Bot fill, gameplay, desktop 15-seat layout, and mobile 15-seat layout with no console errors.
- Deployed to Hugging Face Space `cacodex/uno`; upload commit: `86ff9a7c997869892f08ea0a8ade50e5dccf2198`.
- Live checks passed: `/healthz`, `/`, `/uno-style.css`, WebSocket create-room/add-Bot/start/play flow, per-player hand privacy, and deployed frontend feature markers.
- Added local support for page-refresh reconnect via saved `roomCode/playerId/token`, plus live rename via a `rename` WebSocket command.
- Local verification for reconnect/rename passed: browser smoke test restored the same playing room, same hand, and renamed player after refresh; `pytest -q` reports 14 passed.
- Deployment retry for reconnect/rename succeeded; remote HEAD for `cacodex/uno` is `a85300ab8cb9776deea6cf2a6fbdce5ff500e49d`.
- Live checks after retry passed: `/healthz` returns OK, deployed frontend contains refresh-session and rename handlers, and WebSocket smoke test created a 3-seat game, renamed the host, added 2 Bots, started play, disconnected, reconnected with the same token, restored the same hand, and preserved other players' hand privacy.
- Online browser smoke test passed: the deployed UI created room `RBANS`, added 2 Bots, started play, renamed the human player to `Browser Reloaded`, reloaded the page, restored the same playing room and the same hand IDs, and reported 0 console errors. Screenshot artifact: `uno-online-refresh-rename-smoke.png` in the Playwright output directory.
- Final local verification passed: `pytest -q` reports 14 passed with only FastAPI `on_event` deprecation warnings.
- Remaining suggestion: rotate the Hugging Face token that was shared in chat after confirming deployment access, since it is a long-lived secret.
- Implemented server-authoritative auto draw for human turns with no legal plays, using a 420ms revalidated delay and existing `cards_drawn` events marked with `auto: true` / `reason: no_playable`.
- Implemented single-segment room deep links such as `/ABCDE`; unjoined visitors get the room code prefilled without occupying a seat, while saved matching sessions reconnect and successful create/join updates the browser URL.
- Local verification for auto draw/deep links passed: `python -m py_compile app.py`, `pytest -q` reports 19 passed, `/ABCDE` returns the frontend, browser smoke confirmed unjoined deep link prefill plus `/roomCode` refresh reconnect, and a live local WebSocket probe caught an automatic draw/skip on attempt 10.