feat(player): 互动栏改用参考图同款图标资源

lib/pages/player/widgets/home_feed_overlay.dart

@@ -173,8 +173,7 @@ class _HomeFeedOverlayState extends State<HomeFeedOverlay> {
       items: [
         InteractionRailItem(
           key: const Key('rail-save'),
-          icon: Icons.star_rounded,
-          activeIcon: Icons.star_rounded,
+          asset: 'assets/icon/rail/rail_save.png',
           label: widget.l10n.favorite,
           count: widget.favoriteCount,
           countKey: const Key('rail-save-count'),
@@ -183,8 +182,7 @@ class _HomeFeedOverlayState extends State<HomeFeedOverlay> {
         ),
         InteractionRailItem(
           key: const Key('rail-comments'),
-          icon: Icons.chat_bubble_outline_rounded,
-          activeIcon: Icons.chat_bubble_rounded,
+          asset: 'assets/icon/rail/rail_comment.png',
           label: widget.l10n.comments,
           count: widget.commentCount,
           countKey: const Key('rail-comments-count'),
@@ -192,8 +190,7 @@ class _HomeFeedOverlayState extends State<HomeFeedOverlay> {
         ),
         InteractionRailItem(
           key: const Key('rail-like'),
-          icon: Icons.favorite_rounded,
-          activeIcon: Icons.favorite_rounded,
+          asset: 'assets/icon/rail/rail_like.png',
           label: widget.l10n.like,
           count: widget.likeCount,
           countKey: const Key('rail-like-count'),
@@ -202,10 +199,8 @@ class _HomeFeedOverlayState extends State<HomeFeedOverlay> {
         ),
         InteractionRailItem(
           key: const Key('rail-share'),
-          icon: Icons.reply_rounded,
-          activeIcon: Icons.reply_rounded,
+          asset: 'assets/icon/rail/rail_share.png',
           label: widget.l10n.share,
-          mirrorIcon: true,
           onTap: widget.onShare,
         ),
       ],

lib/pages/player/widgets/interaction_rail.dart

@@ -6,32 +6,28 @@ import '../../../core/formatting/count_format.dart';
 import '../../../core/theme/app_colors.dart';
 
 const double _buttonSize = 44;
-const double _iconSize = 30;
-const double _itemGap = 22;
+const double _iconSize = 32;
+const double _itemGap = 24;
 
 /// 互动栏单项：图标、计数与点击。
 class InteractionRailItem {
   const InteractionRailItem({
     required this.key,
-    required this.icon,
-    required this.activeIcon,
+    required this.asset,
     required this.label,
     required this.onTap,
     this.count,
     this.countKey,
     this.selected = false,
-    this.mirrorIcon = false,
   });
 
   final Key key;
-  final IconData icon;
-  final IconData activeIcon;
+  final String asset;
   final String label;
   final VoidCallback onTap;
   final int? count;
   final Key? countKey;
   final bool selected;
-  final bool mirrorIcon;
 }
 
 /// 播放页与首页 feed 共用的右侧互动栏：收藏/评论/喜欢/分享。
@@ -61,10 +57,6 @@ class _RailButton extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final icon = Icon(
-      item.selected ? item.activeIcon : item.icon,
-      size: _iconSize,
-    );
     return Column(
       key: item.key,
       mainAxisSize: MainAxisSize.min,
@@ -74,10 +66,14 @@ class _RailButton extends StatelessWidget {
           child: IconButton(
             onPressed: item.onTap,
             padding: EdgeInsets.zero,
-            color: item.selected ? AppColors.blue : Colors.white,
-            icon: item.mirrorIcon
-                ? Transform.flip(flipX: true, child: icon)
-                : icon,
+            icon: Image.asset(
+              item.asset,
+              width: _iconSize,
+              height: _iconSize,
+              fit: BoxFit.contain,
+              color: item.selected ? AppColors.blue : Colors.white,
+              colorBlendMode: BlendMode.srcIn,
+            ),
           ),
         ),
         const SizedBox(height: 2),

lib/pages/player/widgets/player_overlay.dart

@@ -147,8 +147,7 @@ class PlayerPlaybackOverlay extends StatelessWidget {
         items: [
           InteractionRailItem(
             key: const Key('player-rail-save'),
-            icon: Icons.star_rounded,
-            activeIcon: Icons.star_rounded,
+            asset: 'assets/icon/rail/rail_save.png',
             label: data.l10n.favorite,
             count: data.favoriteCount,
             countKey: const Key('player-rail-save-count'),
@@ -157,8 +156,7 @@ class PlayerPlaybackOverlay extends StatelessWidget {
           ),
           InteractionRailItem(
             key: const Key('player-rail-comments'),
-            icon: Icons.chat_bubble_outline_rounded,
-            activeIcon: Icons.chat_bubble_rounded,
+            asset: 'assets/icon/rail/rail_comment.png',
             label: data.l10n.comments,
             count: data.commentCount,
             countKey: const Key('player-rail-comments-count'),
@@ -166,8 +164,7 @@ class PlayerPlaybackOverlay extends StatelessWidget {
           ),
           InteractionRailItem(
             key: const Key('player-rail-like'),
-            icon: Icons.favorite_rounded,
-            activeIcon: Icons.favorite_rounded,
+            asset: 'assets/icon/rail/rail_like.png',
             label: data.l10n.like,
             count: data.likeCount,
             countKey: const Key('player-rail-like-count'),
@@ -176,10 +173,8 @@ class PlayerPlaybackOverlay extends StatelessWidget {
           ),
           InteractionRailItem(
             key: const Key('player-rail-share'),
-            icon: Icons.reply_rounded,
-            activeIcon: Icons.reply_rounded,
+            asset: 'assets/icon/rail/rail_share.png',
             label: data.l10n.share,
-            mirrorIcon: true,
             onTap: actions.onShare,
           ),
         ],