style(theme): 客户端切换深色视觉风格

lib/pages/player/widgets/player_more_sheet.dart

@@ -271,7 +271,7 @@ class _PlayerMoreSheetState extends State<PlayerMoreSheet> {
   }) {
     return Material(
       key: key,
-      color: Colors.transparent,
+      color: AppColors.transparent,
       borderRadius: BorderRadius.circular(8),
       child: InkWell(
         borderRadius: BorderRadius.circular(8),
@@ -347,7 +347,7 @@ class _SegmentButton extends StatelessWidget {
         ? AppColors.muted
         : AppColors.subtle;
     return Material(
-      color: Colors.transparent,
+      color: AppColors.transparent,
       borderRadius: BorderRadius.circular(_segmentRadius),
       child: InkWell(
         onTap: onTap,
@@ -357,12 +357,12 @@ class _SegmentButton extends StatelessWidget {
           padding: const EdgeInsets.symmetric(horizontal: _segmentPadding),
           alignment: Alignment.center,
           decoration: BoxDecoration(
-            color: selected ? AppColors.card : Colors.transparent,
+            color: selected ? AppColors.card : AppColors.transparent,
             borderRadius: BorderRadius.circular(_segmentRadius),
             boxShadow: selected
                 ? const [
                     BoxShadow(
-                      color: Color(0x14000000),
+                      color: AppColors.shadowSubtle,
                       blurRadius: 4,
                       offset: Offset(0, 1),
                     ),