feat(player): 未就绪改由进度条展示加载态

test/player/loading_progress_track_test.dart

@@ -0,0 +1,53 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:fruitshorts/core/theme/app_colors.dart';
+import 'package:fruitshorts/pages/player/widgets/loading_progress_track.dart';
+
+void main() {
+  testWidgets('should_move_highlight_while_loading', (tester) async {
+    tester.binding.handleAppLifecycleStateChanged(AppLifecycleState.resumed);
+    addTearDown(
+      () => tester.binding.handleAppLifecycleStateChanged(
+        AppLifecycleState.paused,
+      ),
+    );
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Scaffold(
+          body: Center(
+            child: SizedBox(width: 240, child: LoadingProgressTrack(height: 4)),
+          ),
+        ),
+      ),
+    );
+
+    expect(find.byKey(const Key('progress-loading')), findsOneWidget);
+    expect(
+      tester
+          .widget<ColoredBox>(find.byKey(const Key('progress-loading-track')))
+          .color,
+      Colors.white24,
+    );
+    expect(
+      tester
+          .widget<ColoredBox>(
+            find.byKey(const Key('progress-loading-highlight')),
+          )
+          .color,
+      AppColors.blue,
+    );
+
+    final initialLeft = tester
+        .getTopLeft(find.byKey(const Key('progress-loading-highlight')))
+        .dx;
+    await tester.pump(const Duration(milliseconds: 300));
+    final movedLeft = tester
+        .getTopLeft(find.byKey(const Key('progress-loading-highlight')))
+        .dx;
+    expect(movedLeft, greaterThan(initialLeft));
+    expect(tester.getSize(find.byKey(const Key('progress-loading'))).height, 4);
+  });
+}

test/player/player_fullscreen_test.dart

@@ -18,7 +18,6 @@ import 'package:fruitshorts/core/data/repositories/playback_repository.dart';
 import 'package:fruitshorts/core/data/repositories/watch_history_repository.dart';
 import 'package:fruitshorts/core/data/services/playback_session.dart';
 import 'package:fruitshorts/core/theme/app_colors.dart';
-import 'package:fruitshorts/core/widgets/remote_image.dart';
 import 'package:fruitshorts/pages/auth/auth_view.dart';
 import 'package:fruitshorts/pages/player/widgets/player_center_toggle.dart';
 import 'package:fruitshorts/pages/player/widgets/seek_progress_bar.dart';
@@ -132,15 +131,9 @@ void main() {
     expect(player.playing, isTrue);
   });
 
-  testWidgets('should_fall_back_to_black_when_poster_is_empty', (tester) async {
-    await _pumpApp(
-      tester,
-      catalog: FakeCatalogRepository(dramas: const [_noCoverDrama]),
-    );
-    await _openSeriesPlayer(
-      tester,
-      cardKey: const Key('home-drama-card-no-cover-demo'),
-    );
+  testWidgets('should_keep_video_surface_background_black', (tester) async {
+    await _pumpApp(tester);
+    await _openSeriesPlayer(tester);
 
     expect(
       tester
@@ -150,6 +143,8 @@ void main() {
           .color,
       Colors.black,
     );
+    expect(find.byKey(const Key('player-fallback-cover')), findsNothing);
+    expect(find.byKey(const Key('player-fallback-scrim')), findsNothing);
   });
 
   testWidgets('should_gate_comments_before_opening_sheet_when_signed_out', (
@@ -415,19 +410,9 @@ void main() {
     expect(find.byKey(const Key('player-background')), findsNothing);
     final fallback = find.byKey(const Key('player-fallback-background'));
     expect(fallback, findsOneWidget);
-    expect(find.byKey(const Key('player-fallback-cover')), findsOneWidget);
-    expect(
-      tester
-          .widget<RemoteImage>(find.byKey(const Key('player-fallback-cover')))
-          .fallbackColor,
-      Colors.black,
-    );
-    expect(
-      tester
-          .widget<ColoredBox>(find.byKey(const Key('player-fallback-scrim')))
-          .color,
-      const Color(0x4D000000),
-    );
+    expect(tester.widget<ColoredBox>(fallback).color, Colors.black);
+    expect(find.byKey(const Key('player-fallback-cover')), findsNothing);
+    expect(find.byKey(const Key('player-fallback-scrim')), findsNothing);
     expect(
       tester
           .widget<Scaffold>(find.byKey(const Key('player-scaffold')))
@@ -476,7 +461,8 @@ void main() {
       tester.getSize(find.byKey(const Key('player-bottom-clear-screen'))),
       const Size(40, 40),
     );
-    expect(tester.widget<Slider>(find.byType(Slider)).padding, EdgeInsets.zero);
+    expect(find.byKey(const Key('progress-loading')), findsOneWidget);
+    expect(find.byType(Slider), findsNothing);
 
     expect(bottom.height, lessThanOrEqualTo(200));
     expect(bottom.top, greaterThanOrEqualTo(screenHeight * 0.78));
@@ -1092,7 +1078,8 @@ void _expectFullscreenOverlay(WidgetTester tester) {
   expect(find.byKey(const Key('player-pip')), findsNothing);
   expect(find.byKey(const Key('player-rail-comments')), findsOneWidget);
   expect(find.byKey(const Key('player-fullscreen-toggle')), findsNothing);
-  expect(find.byType(Slider), findsOneWidget);
+  expect(find.byKey(const Key('progress-loading')), findsOneWidget);
+  expect(find.byType(Slider), findsNothing);
   expect(find.byKey(const Key('player-title')), findsNothing);
   expect(find.byKey(const Key('player-subtitle')), findsNothing);
   expect(find.byKey(const Key('player-genre-chip')), findsNothing);
@@ -1211,20 +1198,3 @@ const _lockedDrama = Drama(
     ),
   ],
 );
-
-const _noCoverDrama = Drama(
-  id: 'no-cover-demo',
-  title: 'No Cover Demo',
-  synopsis: 'No cover synopsis',
-  posterUrl: '',
-  detailLoaded: true,
-  episodes: [
-    Episode(
-      id: 'no-cover-demo-1',
-      number: 1,
-      title: 'No Cover Episode',
-      isFree: true,
-      videoUrl: 'https://example.test/no-cover-demo-1.mp4',
-    ),
-  ],
-);

test/player/player_video_surface_test.dart

@@ -12,8 +12,9 @@ void main() {
   ) async {
     await _pumpSurface(tester);
 
-    expect(find.byKey(const Key('player-fallback-background')), findsOneWidget);
-    expect(find.byKey(const Key('player-fallback-cover')), findsOneWidget);
+    expect(_fallbackColor(tester), Colors.black);
+    expect(find.byKey(const Key('player-fallback-cover')), findsNothing);
+    expect(find.byKey(const Key('player-fallback-scrim')), findsNothing);
     expect(_opacity(tester), 0);
     expect(find.byKey(const Key('player-debug-video')), findsNothing);
   });
@@ -48,7 +49,8 @@ void main() {
     expect(halfway, lessThan(1));
     await tester.pump(const Duration(milliseconds: 100));
     expect(_fadeValue(tester), 1);
-    expect(find.byKey(const Key('player-fallback-background')), findsOneWidget);
+    expect(_fallbackColor(tester), Colors.black);
+    expect(find.byKey(const Key('player-fallback-cover')), findsNothing);
     expect(find.byKey(const Key('player-debug-video')), findsNothing);
   });
 
@@ -62,7 +64,8 @@ void main() {
 
     expect(find.byKey(const Key('player-video-error')), findsOneWidget);
     expect(find.text('No route to host'), findsOneWidget);
-    expect(find.byKey(const Key('player-fallback-background')), findsOneWidget);
+    expect(_fallbackColor(tester), Colors.black);
+    expect(find.byKey(const Key('player-fallback-cover')), findsNothing);
     expect(_opacity(tester), 0);
     expect(find.byKey(const Key('player-debug-video')), findsNothing);
   });
@@ -82,7 +85,6 @@ Future<VideoPlayerController> _pumpSurface(
       home: Scaffold(
         body: PlayerVideoSurface(
           controller: controller,
-          posterUrl: '/files/poster.jpg',
           videoUrl: controller.dataSource,
           theater: false,
           onTap: () {},
@@ -94,6 +96,12 @@ Future<VideoPlayerController> _pumpSurface(
   return controller;
 }
 
+Color _fallbackColor(WidgetTester tester) {
+  return tester
+      .widget<ColoredBox>(find.byKey(const Key('player-fallback-background')))
+      .color;
+}
+
 double _opacity(WidgetTester tester) {
   return tester
       .widget<AnimatedOpacity>(find.byKey(const Key('player-video-opacity')))