fix(web/player): auto-skip a failed track instead of dead-ending on "Try again"

A track that fails to load (e.g. a stale system-playlist snapshot pointing
at a rebuilt/removed file) hard-set the player to the 'error' state and
stranded the user on a "Try again" button that just re-queued the same
failing track. Now a load error advances to the next track; the error
state only surfaces once the whole queue has proven unplayable — every
track failed, or we reached the end. A failure streak capped at queue
length stops a fully-broken queue from cycling, and resets on the next
successful play.

Next (Track B cont.): self-heal a stale system-playlist / radio queue by
re-pulling the fresh snapshot on total failure, plus the Android
equivalent. Issue #968.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/lib/player/store.test.ts

@@ -288,6 +288,24 @@ describe('player store — shuffle + repeat + audio reports', () => {
     expect(player.state).toBe('error');
     expect(player.error).toBe('network lost');
   });
+
+  test('reportStateFromAudio("error") auto-advances past a bad track', () => {
+    playQueue([track('1'), track('2'), track('3')]);
+    reportStateFromAudio('error', 'boom');
+    expect(player.index).toBe(1);
+    expect(player.state).toBe('loading');
+    expect(player.error).toBeNull();
+  });
+
+  test('reportStateFromAudio("error") dead-ends once the whole queue is unplayable', () => {
+    playQueue([track('1'), track('2')]);
+    reportStateFromAudio('error', 'boom'); // track 1 fails → skip to track 2
+    expect(player.index).toBe(1);
+    expect(player.state).toBe('loading');
+    reportStateFromAudio('error', 'boom'); // track 2 also fails → exhausted
+    expect(player.state).toBe('error');
+    expect(player.error).toBe('boom');
+  });
 });
 
 import {