fix: harden AI subtitle fix response parsing

src/main/runtime/mpv-main-event-actions.test.ts

@@ -58,6 +58,7 @@ test('media path change handler reports stop for empty path and probes media key
     ensureAnilistMediaGuess: (mediaKey) => calls.push(`guess:${mediaKey}`),
     syncImmersionMediaState: () => calls.push('sync'),
     scheduleCharacterDictionarySync: () => calls.push('dict-sync'),
+    signalAutoplayReadyIfWarm: (path) => calls.push(`autoplay:${path}`),
     refreshDiscordPresence: () => calls.push('presence'),
   });
 
@@ -74,6 +75,34 @@ test('media path change handler reports stop for empty path and probes media key
   ]);
 });
 
+test('media path change handler signals autoplay-ready fast path for warm non-empty media', () => {
+  const calls: string[] = [];
+  const handler = createHandleMpvMediaPathChangeHandler({
+    updateCurrentMediaPath: (path) => calls.push(`path:${path}`),
+    reportJellyfinRemoteStopped: () => calls.push('stopped'),
+    restoreMpvSubVisibility: () => calls.push('restore-mpv-sub'),
+    getCurrentAnilistMediaKey: () => null,
+    resetAnilistMediaTracking: (mediaKey) => calls.push(`reset:${String(mediaKey)}`),
+    maybeProbeAnilistDuration: (mediaKey) => calls.push(`probe:${mediaKey}`),
+    ensureAnilistMediaGuess: (mediaKey) => calls.push(`guess:${mediaKey}`),
+    syncImmersionMediaState: () => calls.push('sync'),
+    scheduleCharacterDictionarySync: () => calls.push('dict-sync'),
+    signalAutoplayReadyIfWarm: (path) => calls.push(`autoplay:${path}`),
+    refreshDiscordPresence: () => calls.push('presence'),
+  });
+
+  handler({ path: '/tmp/video.mkv' });
+
+  assert.deepEqual(calls, [
+    'path:/tmp/video.mkv',
+    'reset:null',
+    'sync',
+    'dict-sync',
+    'autoplay:/tmp/video.mkv',
+    'presence',
+  ]);
+});
+
 test('media title change handler clears guess state and syncs immersion', () => {
   const calls: string[] = [];
   const handler = createHandleMpvMediaTitleChangeHandler({