Leaving a video and returning to it rendered the movie/episode in
AudioPlayer. Closing a webview-rendered video deliberately emits no
"stopped" state (that would break the autoplay handoff), and the
direct-play path does not stop the backend on unmount, so the Rust
controller still reported that item as its loaded media. Re-entering the
route therefore took the "already playing, just show the UI" shortcut,
which returns before a stream URL is fetched, and the render fell
through to the audio surface. Mostly visible on Android, where video
direct-plays; Linux transcodes and stops the backend on unmount.
Both decisions move into playerSurface.ts as pure functions:
shouldReuseActivePlayback excludes video, so video always takes the full
load path and gets its stream URL and resume position;
resolvePlayerSurface maps video-without-a-stream-URL to "pending"
(spinner) rather than falling through to audio.
