refactor(theme): update card and dialog themes to use CardThemeData and DialogThemeData

refactor(ui_components): adjust animation durations for smoother transitions
fix(dashboard): rename border property to hasBorder for clarity
fix(player): rename border property to hasBorder for consistency

lib/core/theme/app_theme.dart

@@ -279,7 +279,7 @@ class AppTheme {
             borderRadius: BorderRadius.circular(radiusMd),
           ),
           padding:
-              const EdgeInsets.symmetric(horizontal: spacing20, vertical: spacing10),
+              const EdgeInsets.symmetric(horizontal: spacing20, vertical: spacing12),
           textStyle: GoogleFonts.inter(
             fontWeight: FontWeight.w600,
             fontSize: 14,
@@ -301,7 +301,7 @@ class AppTheme {
       ),
 
       // ============ CARDS ============
-      cardTheme: CardTheme(
+      cardTheme: CardThemeData(
         color: AppColors.surface,
         elevation: 0,
         margin: EdgeInsets.zero,
@@ -312,7 +312,7 @@ class AppTheme {
       ),
 
       // ============ DIALOGS & BOTTOM SHEETS ============
-      dialogTheme: DialogTheme(
+      dialogTheme: DialogThemeData(
         backgroundColor: AppColors.surface,
         elevation: elevationXl,
         shape: RoundedRectangleBorder(

lib/core/widgets/components/ui_components.dart

@@ -79,7 +79,7 @@ class _GradientButtonState extends State<GradientButton>
   void initState() {
     super.initState();
     _controller = AnimationController(
-      duration: AppTheme.durationFast,
+      duration: AppTheme.durationSm,
       vsync: this,
     );
     _scaleAnimation = Tween<double>(begin: 1.0, end: 0.95).animate(
@@ -356,10 +356,10 @@ class _MediaCardState extends State<MediaCard>
             Expanded(
               child: AnimatedScale(
                 scale: _isHovered ? 1.05 : 1.0,
-                duration: AppTheme.durationFast,
+                duration: AppTheme.durationSm,
                 curve: AppTheme.curveDefault,
                 child: AnimatedContainer(
-                  duration: AppTheme.durationFast,
+                  duration: AppTheme.durationSm,
                   decoration: BoxDecoration(
                     borderRadius: BorderRadius.circular(AppTheme.radiusMd),
                     color: AppColors.surface,