minor fixes

lib/widgets/about/tv_license_page.dart

@@ -219,9 +219,7 @@ class _PackageLicensePageState extends State<_PackageLicensePage> {
       return true;
     }());
     for (final LicenseEntry license in widget.licenseEntries) {
-      if (!mounted) {
-        return;
-      }
+      if (!mounted) return;
       assert(() {
         Timeline.timeSync('_initLicenses()', () {}, flow: Flow.step(debugFlowId));
         return true;
@@ -231,9 +229,7 @@ class _PackageLicensePageState extends State<_PackageLicensePage> {
         Priority.animation,
         debugLabel: 'License',
       );
-      if (!mounted) {
-        return;
-      }
+      if (!mounted) return;
       setState(() {
         _licenses.add(const Padding(
           padding: EdgeInsets.all(18.0),

lib/widgets/debug/general.dart

@@ -66,6 +66,9 @@ class _DebugGeneralSectionState extends State<DebugGeneralSection> with Automati
         ElevatedButton(
           onPressed: () => LeakTracking.collectLeaks().then((leaks) {
             leaks.byType.forEach((type, reports) {
+              // ignore `notGCed` and `gcedLate` for now
+              if (type != LeakType.notDisposed) return;
+
               debugPrint('* leak type=$type');
               groupBy(reports, (report) => report.type).forEach((reportType, typedReports) {
                 debugPrint('  * report type=$reportType');

lib/widgets/viewer/visual/controller_mixin.dart

@@ -26,7 +26,7 @@ mixin EntryViewControllerMixin<T extends StatefulWidget> on State<T> {
   ValueNotifier<AvesEntry?> get entryNotifier;
 
   Future<void> initEntryControllers(AvesEntry? entry) async {
-    if (entry == null) return;
+    if (!mounted || entry == null) return;
 
     if (entry.isVideo) {
       await _initVideoController(entry);

lib/widgets/viewer/visual/video/cover.dart

@@ -79,6 +79,7 @@ class _VideoCoverState extends State<VideoCover> {
   @override
   void dispose() {
     _unregisterWidget(widget);
+    _dismissedCoverMagnifierController?.dispose();
     _videoCoverInfoNotifier.dispose();
     super.dispose();
   }