fix(player): 播放页改为非阻塞加载

lib/pages/player/widgets/player_loading_overlay.dart

@@ -0,0 +1,55 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+
+import '../../../core/theme/app_colors.dart';
+import '../../../core/theme/app_dimens.dart';
+
+class PlayerLoadingOverlay extends StatelessWidget {
+  const PlayerLoadingOverlay({
+    super.key,
+    required this.opacity,
+    required this.onFadeEnd,
+  });
+
+  final double opacity;
+  final VoidCallback onFadeEnd;
+
+  @override
+  Widget build(BuildContext context) {
+    return IgnorePointer(
+      key: const Key('player-entry-loading-overlay'),
+      child: AnimatedOpacity(
+        opacity: opacity,
+        duration: const Duration(milliseconds: 140),
+        curve: Curves.easeOut,
+        onEnd: onFadeEnd,
+        child: ColoredBox(
+          color: AppColors.mediaBlack,
+          child: Center(
+            child: Container(
+              key: const Key('player-loading-surface'),
+              width: AppDimens.refreshIndicatorSize,
+              height: AppDimens.refreshIndicatorSize,
+              decoration: BoxDecoration(
+                color: AppColors.refreshIndicatorSurface,
+                borderRadius: BorderRadius.circular(
+                  AppDimens.refreshIndicatorRadius,
+                ),
+              ),
+              alignment: Alignment.center,
+              child: const SizedBox.square(
+                dimension: AppDimens.refreshSpinnerSize,
+                child: CircularProgressIndicator(
+                  key: Key('player-entry-loading'),
+                  color: Colors.white,
+                  strokeWidth: AppDimens.refreshSpinnerStroke,
+                ),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}