Two real coupling bugs, fixed:
- resolve_video_server still fell back to the music active server when no explicit
video pick was set, so changing the music server changed video. Removed: video
now uses ONLY an explicit video pick or the configured server(s) (Plex default
when both). Changing the music server never changes video.
- The shared settings page could persist active_media_server from the video side.
Guarded saveSettings itself (not just the debounced auto-save) so it NEVER runs
while data-side=video — video saves only via /api/video/*.
Test: video does not follow the music active server. One-way isolation, both ways.
The video side now uses a configured Plex/Jellyfin on its own (resolve_video_
server), not config_manager.get_active_media_server(). So a music-only server
(Navidrome/SoulSync) never applies to video, and 'Navidrome for music + Plex for
video' works. Order: explicit video pick (video_server setting) → music-active if
video-capable → the single configured one → Plex if both → None. Seam tests cover
each case incl. the mixed setup.
