feat(ui): 重做三 Tab 首页与发现页

test/home/home_logic_test.dart

@@ -18,17 +18,20 @@ void main() {
 
   final dramas = [_drama('signal'), _drama('city')];
 
-  test('should_make_first_catalog_entry_the_current_drama_when_catalog_loads', () {
-    final logic = HomeLogic(dramas);
+  test(
+    'should_make_first_catalog_entry_the_current_drama_when_catalog_loads',
+    () {
+      final logic = HomeLogic(dramas);
 
-    expect(logic.currentDrama.id, 'signal');
-    expect(logic.tab, 1);
-    expect(logic.mySection, 0);
-    expect(logic.drawerOpen, isFalse);
-    expect(logic.profile, isFalse);
-    expect(logic.videoImmersive, isFalse);
-    logic.dispose();
-  });
+      expect(logic.currentDrama.id, 'signal');
+      expect(logic.tab, 0);
+      expect(logic.mySection, 0);
+      expect(logic.drawerOpen, isFalse);
+      expect(logic.profile, isFalse);
+      expect(logic.videoImmersive, isFalse);
+      logic.dispose();
+    },
+  );
 
   test('should_not_build_shell_when_catalog_is_empty', () {
     expect(() => HomeLogic(const []), throwsStateError);
@@ -82,33 +85,38 @@ void main() {
     logic.dispose();
   });
 
-  test('should_differ_on_profile_flag_when_open_profile_and_open_library_are_used', () {
-    final logic = HomeLogic(dramas);
+  test(
+    'should_differ_on_profile_flag_when_open_profile_and_open_library_are_used',
+    () {
+      final logic = HomeLogic(dramas);
 
-    logic.openProfile();
-    expect(logic.profile, isTrue);
-    expect(logic.tab, 2);
-    expect(logic.mySection, 0);
-    expect(logic.sectionRequest, 1);
+      logic.openProfile();
+      expect(logic.profile, isTrue);
+      expect(logic.tab, 2);
+      expect(logic.mySection, 0);
+      expect(logic.sectionRequest, 1);
 
-    logic.openLibrary(section: 1);
-    expect(logic.profile, isFalse);
-    expect(logic.mySection, 1);
-    expect(logic.sectionRequest, 2);
+      logic.openLibrary(section: 1);
+      expect(logic.profile, isFalse);
+      expect(logic.mySection, 1);
+      expect(logic.sectionRequest, 2);
 
-    logic.openLibrary();
-    expect(logic.profile, isFalse);
-    expect(logic.mySection, 1);
-    expect(logic.sectionRequest, 3);
-    logic.dispose();
-  });
+      logic.openLibrary();
+      expect(logic.profile, isFalse);
+      expect(logic.mySection, 1);
+      expect(logic.sectionRequest, 3);
+      logic.dispose();
+    },
+  );
 
   test('should_return_home_and_open_drawer_when_system_back_is_pressed', () {
     final logic = HomeLogic(dramas);
 
+    // Home is the launch tab; the first back press lands on Discover.
+    logic.onSystemBack();
+    expect(logic.tab, 1);
     logic.onSystemBack();
     expect(logic.drawerOpen, isTrue);
-    expect(logic.tab, 1);
     expect(logic.backRequest, 0);
     logic.onDrawerChanged(false);
 
@@ -190,7 +198,9 @@ void main() {
     expect(notifications, 0);
   });
 
-  testWidgets('should_map_onto_root_tabs_when_discover_actions_fire', (tester) async {
+  testWidgets('should_map_onto_root_tabs_when_discover_actions_fire', (
+    tester,
+  ) async {
     final logic = HomeLogic(dramas);
     late BuildContext context;
     await tester.pumpWidget(