refactor: enable strict analysis options and fix type safety across codebase

Enable strict-casts, strict-inference, and strict-raw-types in
analysis_options.yaml. Add custom_lint with riverpod_lint. Fix all
resulting type warnings with explicit type parameters and safer casts.

Also improves APK update checker to detect device ABIs for correct
variant selection and fixes Deezer artist name parsing edge case.

lib/utils/clickable_metadata.dart

@@ -252,7 +252,7 @@ void _pushViaPreferredNavigator(BuildContext context, WidgetBuilder builder) {
       identical(currentNavigator, rootNavigator) && activeTabNavigator != null;
 
   if (!shouldRouteToTabNavigator) {
-    currentNavigator.push(MaterialPageRoute(builder: builder));
+    currentNavigator.push(MaterialPageRoute<void>(builder: builder));
     return;
   }
 
@@ -264,12 +264,12 @@ void _pushViaPreferredNavigator(BuildContext context, WidgetBuilder builder) {
     currentNavigator.pop();
     WidgetsBinding.instance.addPostFrameCallback((_) {
       if (!activeTabNavigator.mounted) return;
-      activeTabNavigator.push(MaterialPageRoute(builder: builder));
+      activeTabNavigator.push(MaterialPageRoute<void>(builder: builder));
     });
     return;
   }
 
-  activeTabNavigator.push(MaterialPageRoute(builder: builder));
+  activeTabNavigator.push(MaterialPageRoute<void>(builder: builder));
 }
 
 void _showLoadingSnackBar(BuildContext context, String message) {

lib/utils/logger.dart

@@ -179,15 +179,16 @@ class LogBuffer extends ChangeNotifier {
       final nextIndex = result['next_index'] as int? ?? _lastGoLogIndex;
       final keepNonErrorLogs = _loggingEnabled;
 
-      for (final log in logs) {
-        final level = log['level'] as String? ?? 'INFO';
+      for (final log in logs.whereType<Map<Object?, Object?>>()) {
+        final logMap = Map<String, dynamic>.from(log);
+        final level = logMap['level'] as String? ?? 'INFO';
         if (!keepNonErrorLogs && level != 'ERROR' && level != 'FATAL') {
           continue;
         }
 
-        final timestamp = log['timestamp'] as String? ?? '';
-        final tag = log['tag'] as String? ?? 'Go';
-        final message = log['message'] as String? ?? '';
+        final timestamp = logMap['timestamp'] as String? ?? '';
+        final tag = logMap['tag'] as String? ?? 'Go';
+        final message = logMap['message'] as String? ?? '';
 
         DateTime parsedTime = DateTime.now();
         if (timestamp.isNotEmpty) {