fix(ui): 修正六屏顶栏与内容间距

test/mine/mine_preview_layout_test.dart

@@ -10,6 +10,7 @@ import 'package:fruitshorts/core/data/models/watch_progress.dart';
 import 'package:fruitshorts/core/data/repositories/favorite_repository.dart';
 import 'package:fruitshorts/core/data/repositories/playback_repository.dart';
 import 'package:fruitshorts/core/data/repositories/watch_history_repository.dart';
+import 'package:fruitshorts/core/theme/app_colors.dart';
 
 import '../support/fake_catalog.dart';
 import '../support/fake_category.dart';
@@ -59,11 +60,57 @@ void main() {
 
     expect(find.byKey(const Key('mine-user-row')), findsOneWidget);
     expect(find.byKey(const Key('mine-wallet')), findsOneWidget);
+    for (final key in const [Key('mine-search-button'), Key('mine-avatar')]) {
+      expect(tester.getSize(find.byKey(key)), const Size(36, 36));
+      expect(
+        tester
+            .widget<Icon>(
+              find.descendant(of: find.byKey(key), matching: find.byType(Icon)),
+            )
+            .size,
+        18,
+      );
+    }
     expect(find.byKey(const Key('mine-continue-watching')), findsOneWidget);
     expect(find.byKey(const Key('mine-language')), findsOneWidget);
     expect(find.byKey(const Key('mine-library-tab-0')), findsOneWidget);
     expect(find.byKey(const Key('mine-library-tab-1')), findsOneWidget);
     expect(find.byKey(const Key('mine-library-tab-2')), findsOneWidget);
+    final tab0 = find.byKey(const Key('mine-library-tab-0'));
+    final tab1 = find.byKey(const Key('mine-library-tab-1'));
+    final tab2 = find.byKey(const Key('mine-library-tab-2'));
+    expect(tester.getTopLeft(tab0).dx, lessThan(tester.getTopLeft(tab1).dx));
+    expect(tester.getTopLeft(tab1).dx, lessThan(tester.getTopLeft(tab2).dx));
+    expect(
+      tester.getTopLeft(tab1).dx - tester.getTopRight(tab0).dx,
+      closeTo(20, 1),
+    );
+    expect(
+      (tester
+                  .widget<AnimatedContainer>(
+                    find.descendant(
+                      of: tab0,
+                      matching: find.byType(AnimatedContainer),
+                    ),
+                  )
+                  .decoration
+              as BoxDecoration)
+          .color,
+      AppColors.blue,
+    );
+    expect(
+      (tester
+                  .widget<AnimatedContainer>(
+                    find.descendant(
+                      of: tab1,
+                      matching: find.byType(AnimatedContainer),
+                    ),
+                  )
+                  .decoration
+              as BoxDecoration)
+          .color,
+      Colors.transparent,
+    );
     expect(tester.takeException(), isNull);
   });
 }