feat: bind overlay state to secondary subtitle mpv visibility

src/main/runtime/app-lifecycle-main-cleanup.test.ts

@@ -14,6 +14,7 @@ test('cleanup deps builder returns handlers that guard optional runtime objects'
     destroyTray: () => calls.push('destroy-tray'),
     stopConfigHotReload: () => calls.push('stop-config'),
     restorePreviousSecondarySubVisibility: () => calls.push('restore-sub'),
+    restoreMpvSubVisibilityForInvisibleOverlay: () => calls.push('restore-mpv-sub'),
     unregisterAllGlobalShortcuts: () => calls.push('unregister-shortcuts'),
     stopSubtitleWebsocket: () => calls.push('stop-ws'),
     stopTexthookerService: () => calls.push('stop-texthooker'),
@@ -72,6 +73,7 @@ test('cleanup deps builder skips destroyed yomitan window', () => {
     destroyTray: () => {},
     stopConfigHotReload: () => {},
     restorePreviousSecondarySubVisibility: () => {},
+    restoreMpvSubVisibilityForInvisibleOverlay: () => {},
     unregisterAllGlobalShortcuts: () => {},
     stopSubtitleWebsocket: () => {},
     stopTexthookerService: () => {},