Status API

GET /api/status is optional feedback. Commands only require synchronous validation and queue admission; callers do not need to read status or correlate it with a request.

The response is a fixed PlayerStatus object:

{
  "state": "playing",
  "source": "D:\\media\\main_loop.mp4",
  "cue_position_sec": 0.0,
  "position_sec": 12.45,
  "duration_sec": 60.0,
  "volume": 0.8,
  "muted": false,
  "loop": true,
  "error": null
}

All fields are always present. source, cue_position_sec, position_sec, duration_sec, and error use null when unavailable. error is populated only for state=error; decoder metadata, seekability, normalized progress, device identity, and timestamps remain internal or belong to other diagnostic APIs.