底部tab的灵活可控

lib/features/main_container/presentation/bloc/tab_config_cubit.dart

@@ -0,0 +1,51 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:maibu_satabot_v2/features/main_container/domain/tab_config.dart';
+
+class TabConfigState {
+  final TabConfig config;
+  final int selectedIndex;
+
+  const TabConfigState({
+    required this.config,
+    this.selectedIndex = 0,
+  });
+
+  TabConfigState copyWith({
+    TabConfig? config,
+    int? selectedIndex,
+  }) {
+    return TabConfigState(
+      config: config ?? this.config,
+      selectedIndex: selectedIndex ?? this.selectedIndex,
+    );
+  }
+}
+
+class TabConfigCubit extends Cubit<TabConfigState> {
+  TabConfigCubit() : super(TabConfigState(config: TabConfig.defaultConfig()));
+
+  /// 切换 Tab 的启用状态
+  void toggleTab(String tabId) {
+    final newConfig = state.config.toggleItem(tabId);
+    
+    // 如果当前选中的 Tab 被禁用，自动切换到第一个启用的 Tab
+    int newIndex = state.selectedIndex;
+    if (newIndex >= newConfig.enabledItems.length) {
+      newIndex = 0;
+    }
+    
+    emit(state.copyWith(config: newConfig, selectedIndex: newIndex));
+  }
+
+  /// 切换选中的 Tab
+  void selectTab(int index) {
+    if (index >= 0 && index < state.config.enabledItems.length) {
+      emit(state.copyWith(selectedIndex: index));
+    }
+  }
+
+  /// 重置为默认配置
+  void resetToDefault() {
+    emit(TabConfigState(config: TabConfig.defaultConfig()));
+  }
+}