fix(overlay): strip spinner frame from subsync overlay card

- Add overlayBody override to ConfiguredStatusNotificationOptions so overlay/OSD/desktop can diverge
- Extract getSubsyncStatusNotificationOptions() to strip the ASCII spinner frame from the overlay card (OSD keeps it since it renders the raw spinner)
- Add tests for spinner stripping and subsync result notifications

src/main/runtime/overlay-notifications-runtime.ts

@@ -22,6 +22,7 @@ import { withConfiguredOverlayNotificationPosition } from './overlay-notificatio
 import { createOverlayNotificationDelivery } from './overlay-notification-delivery';
 import {
   getPlaybackFeedbackNotificationOptions,
+  getSubsyncStatusNotificationOptions,
   getYoutubeFlowStatusNotificationOptions,
   notifyConfiguredStatus,
   type ConfiguredStatusNotificationOptions,
@@ -195,15 +196,7 @@ export function createOverlayNotificationsRuntime(deps: OverlayNotificationsRunt
   }
 
   function showSubsyncStatusNotification(message: string): void {
-    const syncing = message.startsWith('Subsync: syncing');
-    const failed = message.toLowerCase().includes('failed');
-    showConfiguredStatusNotification(message, {
-      id: 'subsync-status',
-      title: 'Subsync',
-      variant: failed ? 'error' : syncing ? 'progress' : 'info',
-      persistent: syncing,
-      desktop: !syncing,
-    });
+    showConfiguredStatusNotification(message, getSubsyncStatusNotificationOptions(message));
   }
 
   function showYoutubeFlowStatusNotification(message: string): void {