feat(theme): 校正 K26 预览色板与导航

lib/core/widgets/app_bottom_nav.dart

@@ -16,7 +16,6 @@ class AppBottomNavItem {
     required this.label,
     required this.onTap,
     this.selected = false,
-    this.indicatorKey,
   });
 
   final Key tabKey;
@@ -25,7 +24,6 @@ class AppBottomNavItem {
   final String label;
   final VoidCallback onTap;
   final bool selected;
-  final Key? indicatorKey;
 }
 
 /// Shared 3-tab navigation used by all root tabs and the player fallback.
@@ -52,7 +50,9 @@ class AppBottomNav extends StatelessWidget {
           height: AppDimens.navHeight,
           decoration: BoxDecoration(
             color: backgroundColor.withValues(alpha: 0.95),
-            border: const Border(top: BorderSide(color: AppColors.border)),
+            border: const Border(
+              top: BorderSide(color: AppColors.outlineVariantDark),
+            ),
           ),
           child: Row(
             children: [for (final item in items) _NavDestination(item: item)],
@@ -94,7 +94,7 @@ class _NavDestination extends StatelessWidget {
                       : Colors.white.withValues(alpha: 0.45),
                 ),
               ),
-              const SizedBox(height: 3),
+              const SizedBox(height: 2),
               Text(
                 item.label,
                 maxLines: 1,
@@ -108,18 +108,6 @@ class _NavDestination extends StatelessWidget {
                   letterSpacing: 0,
                 ),
               ),
-              const SizedBox(height: 3),
-              AnimatedContainer(
-                key: item.indicatorKey,
-                duration: const Duration(milliseconds: 160),
-                curve: Curves.easeOut,
-                width: AppDimens.navDot,
-                height: AppDimens.navDot,
-                decoration: BoxDecoration(
-                  color: item.selected ? AppColors.blue : Colors.transparent,
-                  shape: BoxShape.circle,
-                ),
-              ),
             ],
           ),
         ),

lib/core/widgets/glass_panel.dart

@@ -13,7 +13,7 @@ class GlassPanel extends StatelessWidget {
     super.key,
     required this.child,
     this.radius = AppDimens.glassRadius,
-    this.blur = AppDimens.glassBlur,
+    this.blur = 10,
     this.padding,
     this.borderColor = AppColors.glassBorder,
     this.gradient,