fix(jellyfin): show overlay, inject plugin, and fix stats title on playb

- Show visible overlay automatically during Jellyfin playback so subtitleStyle applies
- Inject bundled mpv plugin on auto-launch so keybindings work without overlay focus
- Group Jellyfin playback stats under item metadata (jellyfin://host/item/id) instead of stream URLs so episodes merge with matching local titles
- Mark ffsubsync unavailable in subsync modal for remote media paths
- Drain queued second-instance commands even when onReady throws

src/main/runtime/local-subtitle-selection.ts

@@ -212,12 +212,11 @@ export function createManagedLocalSubtitleSelectionRuntime(deps: {
     pendingTimer = null;
   };
 
+  const hasAppliedSelectionForCurrentMediaPath = (): boolean =>
+    appliedPrimaryMediaPath === currentMediaPath && appliedSecondaryMediaPath === currentMediaPath;
+
   const maybeApplySelection = (trackList: unknown[] | null): void => {
-    if (
-      !currentMediaPath ||
-      (appliedPrimaryMediaPath === currentMediaPath &&
-        appliedSecondaryMediaPath === currentMediaPath)
-    ) {
+    if (!currentMediaPath || hasAppliedSelectionForCurrentMediaPath()) {
       return;
     }
     const selection = resolveManagedLocalSubtitleSelection({
@@ -236,7 +235,7 @@ export function createManagedLocalSubtitleSelectionRuntime(deps: {
       deps.sendMpvCommand(['set_property', 'secondary-sid', selection.secondaryTrackId]);
       appliedSecondaryMediaPath = currentMediaPath;
     }
-    if (appliedPrimaryMediaPath === currentMediaPath) {
+    if (hasAppliedSelectionForCurrentMediaPath()) {
       clearPendingTimer();
     }
   };
@@ -260,7 +259,7 @@ export function createManagedLocalSubtitleSelectionRuntime(deps: {
 
   const scheduleRefresh = (): void => {
     clearPendingTimer();
-    if (!currentMediaPath || appliedPrimaryMediaPath === currentMediaPath) {
+    if (!currentMediaPath || hasAppliedSelectionForCurrentMediaPath()) {
       return;
     }
     pendingTimer = deps.schedule(() => {