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

launcher/jellyfin.ts

@@ -361,6 +361,21 @@ export function classifyJellyfinChildSelection(
   fail('Selected Jellyfin item is not playable.');
 }
 
+export function buildForwardedJellyfinAppArgs(args: Args, appArgs: string[]): string[] {
+  const forwarded = [...appArgs];
+  const serverOverride = sanitizeServerUrl(args.jellyfinServer || '');
+  if (serverOverride) {
+    forwarded.push('--jellyfin-server', serverOverride);
+  }
+  if (args.passwordStore) {
+    forwarded.push('--password-store', args.passwordStore);
+  }
+  if (!forwarded.some((arg) => arg === '--log-level' || arg.startsWith('--log-level='))) {
+    forwarded.push('--log-level', args.logLevel);
+  }
+  return forwarded;
+}
+
 async function runAppJellyfinListCommand(
   appPath: string,
   args: Args,
@@ -384,14 +399,7 @@ async function runAppJellyfinCommand(
   appArgs: string[],
   label: string,
 ): Promise<{ status: number; output: string; error: string; logOffset: number }> {
-  const forwardedBase = [...appArgs];
-  const serverOverride = sanitizeServerUrl(args.jellyfinServer || '');
-  if (serverOverride) {
-    forwardedBase.push('--jellyfin-server', serverOverride);
-  }
-  if (args.passwordStore) {
-    forwardedBase.push('--password-store', args.passwordStore);
-  }
+  const forwardedBase = buildForwardedJellyfinAppArgs(args, appArgs);
 
   const readLogAppendedSince = (offset: number): string => {
     const logPath = getMpvLogPath();

launcher/main.test.ts

@@ -17,6 +17,7 @@ import {
   parseEpisodePathFromDisplay,
   buildRootSearchGroups,
   classifyJellyfinChildSelection,
+  buildForwardedJellyfinAppArgs,
 } from './jellyfin.js';
 
 type RunResult = {
@@ -878,6 +879,27 @@ test('parseJellyfinItemsFromAppOutput parses item title/id/type tuples', () => {
   ]);
 });
 
+test('buildForwardedJellyfinAppArgs forces app log level for parseable list output', () => {
+  const forwarded = buildForwardedJellyfinAppArgs(
+    {
+      jellyfinServer: 'https://jf.example.test/',
+      passwordStore: 'gnome-libsecret',
+      logLevel: 'info',
+    } as never,
+    ['--jellyfin-libraries'],
+  );
+
+  assert.deepEqual(forwarded, [
+    '--jellyfin-libraries',
+    '--jellyfin-server',
+    'https://jf.example.test',
+    '--password-store',
+    'gnome-libsecret',
+    '--log-level',
+    'info',
+  ]);
+});
+
 test('parseJellyfinErrorFromAppOutput extracts bracketed error lines', () => {
   const parsed = parseJellyfinErrorFromAppOutput(`
 [subminer] - 2026-03-01 13:10:34 - WARN - [main] test warning