[ncm-cli] Windows: play command fails without TUI - mpv not spawned

[Aurore1221]

Environment

• OS: Windows 11 (26200.8037)
• ncm-cli: installed via npm install -g @music163/ncm-cli
• mpv: v0.41.0 (installed via winget install shinchiro.mpv, located at C:\Program Files\MPV Player\mpv.exe)
• Node.js: >= 18
• Player config: ncm-cli config set player mpv ✓

Problem

ncm-cli play --song does not work on Windows without TUI running. The command returns {"success": true, "message": "歌曲已发送到播放服务"} but no mpv process is spawned and playback state remains stopped.

With TUI running (user manually runs ncm-cli tui in a separate terminal): playback works perfectly. ncm-cli next, ncm-cli state, ncm-cli queue add all function correctly.

Without TUI running: the play command silently fails. mpv is never started.

This makes it impossible to use ncm-cli for programmatic playback (e.g., via Claude Code or other AI agents) without requiring the user to manually keep a TUI window open.

Steps to Reproduce

1. ncm-cli config set player mpv → ✓
2. ncm-cli login --check → ✓ logged in
3. Close any TUI windows
4. ncm-cli play --song --encrypted-id <id> --original-id <id>
5. Response: {"success": true, "message": "歌曲已发送到播放服务"}
6. ncm-cli state → {"status": "stopped"}
7. tasklist | grep mpv → no mpv process

Expected Behavior

ncm-cli play should be able to start mpv and play audio independently, without requiring TUI to be running. A headless/daemon playback mode would be ideal for AI agent integration scenarios.

Additional Context

• The orpheus player option only supports macOS, leaving mpv as the only option on Windows
• mpv is correctly installed and works when launched manually: "C:\Program Files\MPV Player\mpv.exe" --version → OK
• The likely cause: mpv is not in the default system PATH (installed to C:\Program Files\MPV Player\), and ncm-cli may not be resolving the mpv binary path correctly outside of TUI context
• Even after adding mpv to PATH (ncm-cli config set player mpv succeeds), the standalone play command still does not spawn mpv

Suggestion

1. Support a headless daemon mode (e.g., ncm-cli daemon start) that manages mpv without TUI
2. Or allow play to directly spawn mpv when no daemon/TUI is running
3. On Windows, consider checking common installation paths for mpv (e.g., C:\Program Files\MPV Player\)