feat:增加日程模块tab页面

lib/models/calendar.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:hive/hive.dart';
+import 'package:syncfusion_flutter_calendar/calendar.dart';
 
 // flutter packages pub run build_runner build
 part 'calendar.g.dart';
@@ -52,3 +53,14 @@ class Calendar extends HiveObject {
     );
   }
 }
+
+enum CalendarTab {
+  week('周视图', CalendarView.week),
+  month('月视图', CalendarView.month),
+  schedule('日程视图', CalendarView.schedule);
+
+  final String label;
+  final CalendarView view;
+
+  const CalendarTab(this.label, this.view);
+}