modify icon & add notify function

lib/main.dart

@@ -23,6 +23,7 @@ import './calendar/calendar_manager.dart';
 import './expense/expense_manager.dart';
 import './chart/channel_sales_manager.dart';
 import './bpm/sign_todo_manager.dart';
+import './message/message_manager.dart';
 
 class MyHttpOverrides extends HttpOverrides {
   @override
@@ -162,9 +163,9 @@ class MainMenu extends StatelessWidget {
         targetScreen: IssueManager(),
       ),
       MenuItem(
-        title: '設定',
-        icon: Icons.settings,
-        targetScreen: SettingsPage(),
+        title: '訊息通知',
+        icon: Icons.notifications,
+        targetScreen: MessageManager(currentUserId: uid),
       ),
       MenuItem(
         title: '費用申請',
@@ -178,6 +179,11 @@ class MainMenu extends StatelessWidget {
         targetScreen: NewsManager(),
         //targetScreen: AnnouncementManager(),
       ),
+      MenuItem(
+        title: '設定',
+        icon: Icons.settings,
+        targetScreen: SettingsPage(),
+      ),
     ];
 
     return Scaffold(