fix(flutter): feed 长按加速与刷新转圈

lib/pages/player/widgets/home_feed_overlay_parts.dart

@@ -3,9 +3,9 @@
 part of 'home_feed_overlay.dart';
 
 const double _thumbSize = 6;
-const double _thumbActiveSize = 10;
-const double _trackActiveHeight = 4;
-const double _lineCenterFromBottom = 6;
+const double _thumbActiveSize = 14;
+const double _trackActiveHeight = 6;
+const double _lineCenterFromBottom = 8;
 
 /// 顶部频道 tab：漫剧点击提示即将上线。
 enum _FeedTab {
@@ -69,6 +69,7 @@ class _RefreshButton extends StatelessWidget {
     required this.tooltip,
     required this.dimension,
     required this.glyphSize,
+    required this.refreshing,
     required this.onTap,
     required this.onLongPress,
   });
@@ -76,6 +77,7 @@ class _RefreshButton extends StatelessWidget {
   final String tooltip;
   final double dimension;
   final double glyphSize;
+  final bool refreshing;
   final VoidCallback onTap;
   final VoidCallback onLongPress;
 
@@ -90,12 +92,23 @@ class _RefreshButton extends StatelessWidget {
         onLongPress: onLongPress,
         child: SizedBox.square(
           dimension: dimension,
-          child: Icon(
-            Icons.refresh_rounded,
-            size: glyphSize,
-            color: Colors.white,
-            shadows: const [Shadow(blurRadius: 6, color: Colors.black)],
-          ),
+          child: refreshing
+              ? const Center(
+                  child: SizedBox.square(
+                    dimension: 18,
+                    child: CircularProgressIndicator(
+                      key: Key('home-feed-refreshing'),
+                      strokeWidth: 2,
+                      color: Colors.white,
+                    ),
+                  ),
+                )
+              : Icon(
+                  Icons.refresh_rounded,
+                  size: glyphSize,
+                  color: Colors.white,
+                  shadows: const [Shadow(blurRadius: 6, color: Colors.black)],
+                ),
         ),
       ),
     );