fix(player): restore the subtitle sidecar work dropped by the previous commit

The previous commit was assembled from a tree read before 13264e22 landed,
so committing it reverted that commit's changes: the image-based subtitle
filtering in device_profile/types, subtitleTracks and its tests, the
regenerated bindings, and the VideoPlayer menu wiring.

Nothing was lost — the working tree held both changes throughout. This
restores those files to the merged state, leaving both the subtitle fix and
the play-session fix in place.

TRACES: UR-020, UR-004 | DR-176 | UT-168

src/lib/components/player/VideoPlayer.svelte

@@ -16,6 +16,7 @@
   import { videoFitClass } from "./videoFit";
   import { fatalNetworkErrorAction } from "./hlsRecovery";
   import {
+    subtitleStreamsOf,
     resolveSubtitleTracks,
     reconcileSelectedSubtitle,
     videoCrossOriginMode,
@@ -333,13 +334,18 @@
     }
   }
 
-  // Get available subtitle tracks from media streams
+  // The subtitle streams the menu offers — the same list the <track> children
+  // and the native play request are built from, so the menu can never name a
+  // track the player was never given. subtitleStreamsOf() also drops the ones
+  // the backend says it cannot deliver as a sidecar (image-based PGS/DVD/DVB,
+  // which only server burn-in could show and we never ask for — DR-176).
+  // TRACES: UR-020 | DR-176 | UT-168
   const subtitleTracks = $derived(() => {
     if (!media || !media.mediaStreams) {
       console.log("[VideoPlayer] No media or mediaStreams available for subtitles");
       return [];
     }
-    const tracks = media.mediaStreams.filter(stream => stream.kind === "subtitle");
+    const tracks = subtitleStreamsOf(media.mediaStreams);
     console.log("[VideoPlayer] Found subtitle tracks:", tracks.length, tracks);
     return tracks;
   });