fix(favorite): 统一收藏状态与互动图标

lib/pages/player/widgets/interaction_rail.dart

@@ -13,17 +13,19 @@ const double _itemGap = 24;
 class InteractionRailItem {
   const InteractionRailItem({
     required this.key,
-    required this.asset,
     required this.label,
     required this.onTap,
+    this.asset,
+    this.icon,
     this.count,
     this.countKey,
     this.selected = false,
     this.selectedColor = AppColors.blue,
-  });
+  }) : assert((asset == null) != (icon == null));
 
   final Key key;
-  final String asset;
+  final String? asset;
+  final IconData? icon;
   final String label;
   final VoidCallback onTap;
   final int? count;
@@ -68,14 +70,24 @@ class _RailButton extends StatelessWidget {
           child: IconButton(
             onPressed: item.onTap,
             padding: EdgeInsets.zero,
-            icon: Image.asset(
-              item.asset,
-              width: _iconSize,
-              height: _iconSize,
-              fit: BoxFit.contain,
-              color: item.selected ? item.selectedColor : AppColors.onPrimary,
-              colorBlendMode: BlendMode.srcIn,
-            ),
+            icon: item.asset != null
+                ? Image.asset(
+                    item.asset!,
+                    width: _iconSize,
+                    height: _iconSize,
+                    fit: BoxFit.contain,
+                    color: item.selected
+                        ? item.selectedColor
+                        : AppColors.onPrimary,
+                    colorBlendMode: BlendMode.srcIn,
+                  )
+                : Icon(
+                    item.icon,
+                    size: _iconSize,
+                    color: item.selected
+                        ? item.selectedColor
+                        : AppColors.onPrimary,
+                  ),
           ),
         ),
         const SizedBox(height: 2),