feat(ui): 更新底栏图标与播放加载视觉

lib/pages/recommend/widgets/recommend_channel_nav.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 
 import '../../../core/data/models/content_category.dart';
 import '../../../core/theme/app_colors.dart';
+import '../../../core/theme/app_dimens.dart';
 import '../../../core/widgets/animated_nav_label.dart';
 import '../../../l10n/app_localizations.dart';
 import 'search_gift_glyphs.dart';
@@ -11,7 +12,7 @@ import 'search_gift_glyphs.dart';
 const double _navHeight = 56;
 const double _tabGap = 20;
 const double _tabFont = 17;
-const double _searchHitSize = 40;
+const double _searchHitSize = AppDimens.tapTarget;
 const double _searchIconSize = 26;
 const double _giftIconSize = 26;
 const double _underlineWidth = 26;

lib/pages/recommend/widgets/recommend_top_nav.dart

@@ -39,7 +39,7 @@ class RecommendTopNav extends StatelessWidget {
   /// 首页横向页面的连续位置，用于文字和下划线跟手过渡。
   final double? pagePosition;
 
-  /// 右上角金色礼物盒（钱包入口）；为空时不显示。
+  /// 右上角礼包入口；为空时不显示。
   final VoidCallback? onGift;
 
   @override

lib/pages/recommend/widgets/search_gift_glyphs.dart

@@ -50,8 +50,12 @@ class _SearchPainter extends CustomPainter {
     final center = Offset(circleDiameter / 2, circleDiameter / 2);
     canvas.drawCircle(center, circleDiameter / 2 - stroke / 2, paint);
 
-    final start = center + Offset.fromDirection(direction, circleDiameter / 2 - stroke * 0.2);
-    final end = center + Offset.fromDirection(direction, circleDiameter / 2 + size.width * 0.12);
+    final start =
+        center +
+        Offset.fromDirection(direction, circleDiameter / 2 - stroke * 0.2);
+    final end =
+        center +
+        Offset.fromDirection(direction, circleDiameter / 2 + size.width * 0.12);
     canvas.drawLine(start, end, paint);
   }
 
@@ -60,7 +64,7 @@ class _SearchPainter extends CustomPainter {
       oldDelegate.color != color;
 }
 
-/// emoji 礼盒（红盒金丝带，随系统 emoji 风格渲染）。
+/// YMB 品牌礼盒静态图标，使用玫红礼盒与金色丝带。
 class GiftGlyph extends StatelessWidget {
   const GiftGlyph({super.key, required this.size});
 
@@ -68,11 +72,94 @@ class GiftGlyph extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return SizedBox.square(
-      dimension: size,
-      child: FittedBox(
-        child: Text('🎁', style: TextStyle(fontSize: size, height: 1)),
-      ),
-    );
+    return CustomPaint(size: Size.square(size), painter: _GiftPainter());
   }
 }
+
+class _GiftPainter extends CustomPainter {
+  const _GiftPainter();
+
+  static const double _designSize = 26;
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    canvas.save();
+    canvas.scale(size.width / _designSize);
+    _paintBox(canvas);
+    _paintRibbon(canvas);
+    _paintBow(canvas);
+    canvas.restore();
+  }
+
+  void _paintBox(Canvas canvas) {
+    final body = RRect.fromRectAndRadius(
+      const Rect.fromLTRB(4, 13, 22, 23),
+      const Radius.circular(2),
+    );
+    canvas.drawRRect(
+      body,
+      Paint()
+        ..shader = const LinearGradient(
+          begin: Alignment.topLeft,
+          end: Alignment.bottomRight,
+          colors: [Color(0xFFFF5C82), Color(0xFFEF315D)],
+        ).createShader(const Rect.fromLTRB(4, 13, 22, 23)),
+    );
+    canvas.drawRRect(
+      RRect.fromRectAndRadius(
+        const Rect.fromLTRB(3, 10, 23, 14),
+        const Radius.circular(1.5),
+      ),
+      Paint()
+        ..shader = const LinearGradient(
+          colors: [Color(0xFFFF7190), Color(0xFFF52E5C)],
+        ).createShader(const Rect.fromLTRB(3, 10, 23, 14)),
+    );
+  }
+
+  void _paintRibbon(Canvas canvas) {
+    final ribbon = Paint()
+      ..shader = const LinearGradient(
+        begin: Alignment.topCenter,
+        end: Alignment.bottomCenter,
+        colors: [Color(0xFFFFFFA8), Color(0xFFFFD52F), Color(0xFFFFB900)],
+      ).createShader(const Rect.fromLTRB(10.5, 10, 15.5, 23));
+    canvas.drawRect(const Rect.fromLTRB(10.5, 13, 15.5, 23), ribbon);
+    canvas.drawRect(const Rect.fromLTRB(3, 10.5, 23, 14), ribbon);
+    canvas.drawLine(
+      const Offset(11, 14),
+      const Offset(11, 22),
+      Paint()
+        ..color = const Color(0xFFFFFFAE)
+        ..strokeWidth = 0.6,
+    );
+  }
+
+  void _paintBow(Canvas canvas) {
+    final gold = Paint()
+      ..shader = const LinearGradient(
+        colors: [Color(0xFFFFFFA8), Color(0xFFFFD52F), Color(0xFFFFB900)],
+      ).createShader(const Rect.fromLTRB(5, 1, 21, 12));
+    final tails = Path()
+      ..moveTo(11.8, 7)
+      ..lineTo(15, 7)
+      ..lineTo(17, 13)
+      ..lineTo(14.1, 12)
+      ..lineTo(12.6, 14)
+      ..lineTo(10.8, 8)
+      ..close();
+    canvas.drawPath(tails, gold);
+    final bow = Path()
+      ..moveTo(13, 7)
+      ..cubicTo(5.2, 0, 5.2, 4.8, 7.5, 6.7)
+      ..cubicTo(9, 8, 11.5, 8, 13, 7)
+      ..cubicTo(14.5, 8, 17, 8, 18.5, 6.7)
+      ..cubicTo(20.8, 4.8, 20.8, 0, 13, 7)
+      ..close();
+    canvas.drawPath(bow, gold);
+    canvas.drawCircle(const Offset(13, 7), 1.55, gold);
+  }
+
+  @override
+  bool shouldRepaint(covariant _GiftPainter oldDelegate) => false;
+}