fix(jellyfin): fix discovery loop, device identity, tray state, and Disc

- Derive device identity from OS hostname; remove legacy configurable client/device fields
- Prevent discovery playback from reloading active item, misreporting pause state, and duplicate overlay restores
- Restart stale tray discovery sessions without re-login when server drops SubMiner cast target
- Sync tray discovery checkbox state on Linux after CLI/startup/remote-session changes
- Stop Discord presence falling back to stream URLs; prime title before tokenized stream loads
- Fix picker library discovery when log level is above info
- Fix config.example.jsonc trailing commas and array formatting

src/core/services/discord-presence.test.ts

@@ -91,6 +91,22 @@ test('buildDiscordPresenceActivity shows media title regardless of style', () =>
   }
 });
 
+test('buildDiscordPresenceActivity never falls back to remote stream URLs', () => {
+  const payload = buildDiscordPresenceActivity(baseConfig, {
+    ...baseSnapshot,
+    mediaTitle: null,
+    mediaPath:
+      'http://jellyfin.local/Videos/item-1/stream?static=true&api_key=secret-token&MediaSourceId=ms-1',
+  });
+
+  assert.equal(payload.details, 'Unknown media');
+  assert.equal(payload.state, 'Playing 01:35 / 24:10');
+  const serialized = JSON.stringify(payload);
+  assert.equal(serialized.includes('api_key'), false);
+  assert.equal(serialized.includes('secret-token'), false);
+  assert.equal(serialized.includes('/Videos/item-1/stream'), false);
+});
+
 test('service deduplicates identical updates and sends changed timeline', async () => {
   const sent: DiscordActivityPayload[] = [];
   const timers = new Map<number, () => void>();

src/core/services/discord-presence.ts

@@ -106,6 +106,15 @@ function basename(filePath: string | null): string {
   return parts[parts.length - 1] ?? '';
 }
 
+function fallbackTitleFromMediaPath(mediaPath: string | null): string {
+  const trimmed = mediaPath?.trim();
+  if (!trimmed) return '';
+  if (/^[a-z][a-z0-9+.-]*:\/\//i.test(trimmed) && !trimmed.toLowerCase().startsWith('file://')) {
+    return '';
+  }
+  return basename(trimmed).split(/[?#]/)[0] ?? '';
+}
+
 function buildStatus(snapshot: DiscordPresenceSnapshot): string {
   if (!snapshot.connected || !snapshot.mediaPath) return 'Idle';
   if (snapshot.paused) return 'Paused';
@@ -130,7 +139,10 @@ export function buildDiscordPresenceActivity(
 ): DiscordActivityPayload {
   const style = resolvePresenceStyle(config.presenceStyle);
   const status = buildStatus(snapshot);
-  const title = sanitizeText(snapshot.mediaTitle, basename(snapshot.mediaPath) || 'Unknown media');
+  const title = sanitizeText(
+    snapshot.mediaTitle,
+    fallbackTitleFromMediaPath(snapshot.mediaPath) || 'Unknown media',
+  );
   const details =
     snapshot.connected && snapshot.mediaPath ? trimField(title) : style.fallbackDetails;
   const timeline = `${formatClock(snapshot.currentTimeSec)} / ${formatClock(snapshot.mediaDurationSec)}`;