feat(flutter): 精简首页标题并重做空态视觉

test/discover/home_all_dramas_grid_test.dart

@@ -37,13 +37,24 @@ void main() {
       await tester.pumpAndSettle();
 
       expect(find.text('Continue Watching'), findsNothing);
-      expect(find.text('All Dramas'), findsOneWidget);
+      expect(find.byKey(const Key('home-all-dramas-title')), findsNothing);
       expect(find.text('All'), findsOneWidget);
       expect(find.text('For You'), findsNothing);
       expect(
         tester.getCenter(find.text('All')).dx,
         lessThan(tester.getCenter(find.text('Hot')).dx),
       );
+      expect(
+        tester
+                .getTopLeft(
+                  find.byKey(const Key('home-drama-card-the-signal-demo')),
+                )
+                .dy -
+            tester
+                .getBottomLeft(find.byKey(const Key('home-category-chips')))
+                .dy,
+        closeTo(14, 0.1),
+      );
 
       final grid = tester.widget<SliverGrid>(
         find.byKey(const Key('home-all-dramas-grid')),
@@ -135,7 +146,7 @@ void main() {
     await tester.tap(find.byKey(const Key('tab-discover')));
     await tester.pumpAndSettle();
 
-    expect(find.text('All Dramas'), findsOneWidget);
+    expect(find.byKey(const Key('home-all-dramas-title')), findsNothing);
     expect(find.text('No matching dramas.'), findsOneWidget);
 
     await tester.tap(find.text('Romance'));
@@ -154,7 +165,7 @@ void main() {
     await tester.tap(find.byKey(const Key('tab-discover')));
     await tester.pumpAndSettle();
 
-    expect(find.text('All Dramas'), findsOneWidget);
+    expect(find.byKey(const Key('home-all-dramas-title')), findsNothing);
     expect(find.text('Categories could not be loaded.'), findsOneWidget);
     expect(find.text('Retry'), findsOneWidget);
     expect(find.byKey(const Key('home-all-dramas-grid')), findsNothing);
@@ -176,7 +187,7 @@ void main() {
     );
     await tester.pumpAndSettle();
 
-    expect(find.text('All Dramas'), findsOneWidget);
+    expect(find.byKey(const Key('home-all-dramas-title')), findsNothing);
     expect(find.text('City Lights & Velvet Nights'), findsOneWidget);
     expect(tester.takeException(), isNull);
   });