refactor: 优化日历状态管理与首页输入框，添加API客户端抽象

apps/lib/features/todo/ui/screens/todo_quadrants_screen.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:lucide_icons/lucide_icons.dart';
+import '../../../../core/di/injection.dart';
 import '../../../../core/theme/design_tokens.dart';
+import '../../../calendar/ui/calendar_state_manager.dart';
 
 class TodoQuadrantsScreen extends StatelessWidget {
   const TodoQuadrantsScreen({super.key});
@@ -216,7 +218,18 @@ class TodoQuadrantsScreen extends StatelessWidget {
                   ),
                   const SizedBox(width: 4),
                   GestureDetector(
-                    onTap: () => context.push('/calendar/dayweek'),
+                    onTap: () {
+                      final manager = sl<CalendarStateManager>();
+                      final viewType = manager.viewType;
+                      final date = manager.selectedDate;
+                      final dateStr =
+                          '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
+                      if (viewType == CalendarViewType.month) {
+                        context.push('/calendar/month');
+                      } else {
+                        context.push('/calendar/dayweek?date=$dateStr');
+                      }
+                    },
                     child: Container(
                       width: 44,
                       height: 44,