chore: cleanup unused code and dead imports

lib/screens/settings/about_page.dart

@@ -15,7 +15,7 @@ class AboutPage extends StatelessWidget {
     final topPadding = MediaQuery.of(context).padding.top;
 
     return PopScope(
-      canPop: true, // Always allow back gesture
+      canPop: true,
       child: Scaffold(
         body: CustomScrollView(
           slivers: [
@@ -253,9 +253,9 @@ class _AppHeaderCard extends StatelessWidget {
               color: colorScheme.primary,
               shape: BoxShape.circle,
             ),
-            child: Image.asset(
+            child:             Image.asset(
               'assets/images/logo-transparant.png',
-              color: colorScheme.onPrimary, // Tint with onPrimary color
+              color: colorScheme.onPrimary,
               fit: BoxFit.contain,
               errorBuilder: (_, _, _) => ClipRRect(
                 borderRadius: BorderRadius.circular(24),

lib/screens/settings/appearance_settings_page.dart

@@ -17,7 +17,7 @@ class AppearanceSettingsPage extends ConsumerWidget {
     final topPadding = MediaQuery.of(context).padding.top;
 
     return PopScope(
-      canPop: true, // Always allow back gesture
+      canPop: true,
       child: Scaffold(
         body: CustomScrollView(
           slivers: [
@@ -161,7 +161,7 @@ class _ThemePreviewCard extends StatelessWidget {
         width: double.infinity,
         decoration: BoxDecoration(
           color: colorScheme
-              .surfaceContainerHighest, // Background similar to reference
+              .surfaceContainerHighest,
           borderRadius: BorderRadius.circular(28),
         ),
         clipBehavior: Clip.antiAlias,
@@ -203,7 +203,7 @@ class _ThemePreviewCard extends StatelessWidget {
                   boxShadow: [
                     BoxShadow(
                       color: Colors.black.withValues(alpha: 0.1),
-                      blurRadius: 12, // Reduced from 20 for performance
+                      blurRadius: 12,
                       offset: const Offset(0, 8),
                     ),
                   ],

lib/screens/settings/download_settings_page.dart

@@ -22,7 +22,7 @@ class DownloadSettingsPage extends ConsumerWidget {
     final isBuiltInService = _builtInServices.contains(settings.defaultService);
 
     return PopScope(
-      canPop: true, // Always allow back gesture
+      canPop: true,
       child: Scaffold(
         body: CustomScrollView(
           slivers: [