Streaming a peer file connects over mesh/Tor before the first frame, so the
player sat blank. Add a loading state:
- PeerFiles video modal: spinner overlay ("Connecting to peer…") until the
<video> fires playing/canplay; an error overlay on failure instead of a
silent black box.
- useAudioPlayer: loading flag driven by loadstart/waiting vs canplay/playing;
GlobalAudioPlayer shows a spinner in the transport button while connecting.
- Fix the misleading audio error "Could not play audio. File Browser may not be
running." (wrong for peer content) → "Could not play this audio file. The peer
may be offline…" (B22).
type-check clean; useAudioPlayer tests 10/10.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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