feat(player): 重做播放页信息层级与互动栏点击动效

test/player/player_fullscreen_test.dart

@@ -1271,6 +1271,22 @@ void main() {
     expect(find.byKey(const Key('player-interaction-rail')), findsOneWidget);
   });
 
+  testWidgets('should_keep_episode_entry_regular_when_player_is_open', (
+    tester,
+  ) async {
+    await _pumpApp(tester);
+    await _openSeriesPlayer(tester);
+    final entry = tester.widget<Text>(
+      find.descendant(
+        of: find.byKey(const Key('player-episodes-pill')),
+        matching: find.byType(Text),
+      ),
+    );
+    expect(entry.style?.fontWeight, FontWeight.w400);
+    expect(entry.style?.fontSize, 13.5);
+    expect(entry.data, contains(' · '));
+  });
+
   testWidgets('should_push_episodes_arrow_to_pill_right', (tester) async {
     // 宽屏下文案不会撑满胶囊，才能验证箭头是否被推到最右侧。
     await _pumpApp(tester, size: const Size(900, 844));
@@ -1371,9 +1387,9 @@ void main() {
     final shareRect = tester.getRect(
       find.byKey(const Key('player-rail-share')),
     );
-    expect(likeRect.top - saveRect.bottom, closeTo(12, 0.1));
-    expect(commentsRect.top - likeRect.bottom, closeTo(12, 0.1));
-    expect(shareRect.top - commentsRect.bottom, closeTo(12, 0.1));
+    expect(likeRect.top - saveRect.bottom, closeTo(6, 0.1));
+    expect(commentsRect.top - likeRect.bottom, closeTo(6, 0.1));
+    expect(shareRect.top - commentsRect.bottom, closeTo(6, 0.1));
 
     final saveButton = tester.widget<IconButton>(
       find.descendant(
@@ -1405,7 +1421,9 @@ void main() {
     );
   });
 
-  testWidgets('should_toggle_synopsis_with_inline_text_button', (tester) async {
+  testWidgets('should_toggle_synopsis_at_fixed_corner_with_feed_motion', (
+    tester,
+  ) async {
     final longCopy = Drama(
       id: 'long-copy-demo',
       title: 'Long Title',
@@ -1428,7 +1446,7 @@ void main() {
     await _pumpApp(tester, catalog: FakeCatalogRepository(dramas: [longCopy]));
     await _openSeriesPlayer(tester, feedIndex: 0);
 
-    final toggle = find.byKey(const Key('player-synopsis-toggle'));
+    final toggle = find.byKey(const Key('player-synopsis-more'));
     final synopsis = find.byKey(const Key('player-synopsis'));
     expect(
       find.descendant(of: toggle, matching: find.text('More')),
@@ -1443,17 +1461,15 @@ void main() {
           ?.color,
       AppColors.textPrimary,
     );
-    expect(tester.widget<Text>(synopsis).maxLines, 1);
+    expect(tester.widget<Text>(synopsis).maxLines, 2);
     expect(tester.widget<Text>(synopsis).overflow, TextOverflow.ellipsis);
-    // 行尾「展开」与正文同一行，只留 6 的左边距。
-    expect(
-      tester
-          .widget<Padding>(
-            find.descendant(of: toggle, matching: find.byType(Padding)),
-          )
-          .padding,
-      const EdgeInsets.only(left: 6),
+    final motion = tester.widget<AnimatedSize>(
+      find.byKey(const Key('player-synopsis-size')),
     );
+    expect(motion.duration, const Duration(milliseconds: 240));
+    expect(motion.curve, Curves.easeInOutCubic);
+    final blockFinder = find.byKey(const Key('player-episode-synopsis'));
+    final collapsedHeight = tester.getSize(blockFinder).height;
     final synopsisRect = tester.getRect(synopsis);
     final toggleRect = tester.getRect(toggle);
     expect(toggleRect.left, greaterThan(synopsisRect.left));
@@ -1463,24 +1479,24 @@ void main() {
     );
 
     await tester.tap(toggle);
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 80));
+    final growingHeight = tester.getSize(blockFinder).height;
+    expect(growingHeight, greaterThan(collapsedHeight));
+    expect(tester.getRect(toggle), toggleRect);
     await tester.pumpAndSettle();
     expect(
       find.descendant(of: toggle, matching: find.text('Less')),
       findsOneWidget,
     );
     expect(
-      tester.widget<Text>(find.byKey(const Key('player-synopsis'))).maxLines,
+      tester
+          .widget<Text>(find.byKey(const Key('player-synopsis-expanded')))
+          .maxLines,
       isNull,
     );
-    final lessRect = tester.getRect(toggle);
-    final textRect = tester.getRect(find.byKey(const Key('player-synopsis')));
-    final block = tester.getRect(
-      find.byKey(const Key('player-episode-synopsis')),
-    );
-    // 展开后「收起」内联在正文最后一行的行尾。
-    expect(lessRect.top, greaterThanOrEqualTo(textRect.top));
-    expect(lessRect.bottom, lessThanOrEqualTo(textRect.bottom + 1));
-    expect(lessRect.right - block.right, lessThanOrEqualTo(2));
+    expect(tester.getRect(toggle), toggleRect);
+    expect(tester.getSize(blockFinder).height, greaterThan(growingHeight));
 
     await tester.tap(toggle);
     await tester.pumpAndSettle();
@@ -1488,29 +1504,24 @@ void main() {
       find.descendant(of: toggle, matching: find.text('More')),
       findsOneWidget,
     );
-    expect(tester.widget<Text>(synopsis).maxLines, 1);
+    expect(tester.widget<Text>(synopsis).maxLines, 2);
   });
 
-  testWidgets('should_share_one_text_style_across_label_and_synopsis', (
+  testWidgets('should_match_feed_synopsis_without_episode_prefix', (
     tester,
   ) async {
     await _pumpApp(tester);
     await _openSeriesPlayer(tester);
 
-    // 新 UI 把「第 n 集」与简介合并进同一个富文本，整行共用一套白字规格。
     final line = tester.widget<Text>(find.byKey(const Key('player-synopsis')));
     final style = line.style ?? const TextStyle();
-    expect(style.fontSize, 12);
-    expect(style.fontWeight, FontWeight.w500);
-    expect(style.color, AppColors.onPrimary);
-
-    final span = line.textSpan! as TextSpan;
-    final separator = span.children!.whereType<TextSpan>().firstWhere(
-      (child) => (child.text ?? '').contains('|'),
-    );
-    expect(separator.style?.fontSize, 12);
-    expect(separator.style?.fontWeight, FontWeight.w400);
-    expect(separator.style?.color, AppColors.onPrimary.withValues(alpha: 0.45));
+    expect(style.fontSize, 15);
+    expect(style.fontWeight, FontWeight.w400);
+    expect(style.color, AppColors.overlaySecondary);
+    expect(style.shadows ?? <Shadow>[], isEmpty);
+    expect(line.textSpan!.toPlainText(), isNot(startsWith('Episode ')));
+    expect(line.textSpan!.toPlainText(), isNot(contains('  |  ')));
+    expect(find.byKey(const Key('player-episode-heading')), findsOneWidget);
   });
 
   testWidgets('should_fit_long_title_and_synopsis_at_320_width', (
@@ -1563,7 +1574,7 @@ void main() {
       tester.getRect(find.byKey(const Key('player-synopsis'))).right,
       lessThanOrEqualTo(320 - 14 - 54),
     );
-    expect(synopsis.maxLines, 1);
+    expect(synopsis.maxLines, 2);
     expect(synopsis.overflow, TextOverflow.ellipsis);
     expect(
       tester.getRect(find.byKey(const Key('player-episodes-pill'))).right,