add chart code

lib/main.dart

@@ -21,6 +21,7 @@ import './clockin/clock_in_manager.dart';
 import './leave/leave_manager.dart';
 import './calendar/calendar_manager.dart';
 import './expense/expense_manager.dart';
+import './chart/channel_sales_manager.dart';
 
 class MyHttpOverrides extends HttpOverrides {
   @override
@@ -48,7 +49,7 @@ class ZenApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: '企業應用主選單',
+      title: '企業行動e化中控台',
       theme: ThemeData(
         primarySwatch: Colors.blue,
         // 使用 Material 3 風格
@@ -152,7 +153,7 @@ class MainMenu extends StatelessWidget {
       MenuItem(
         title: '業績查詢',
         icon: Icons.query_stats,
-        targetScreen: PlaceholderScreen(title: '報告查詢'),
+        targetScreen: ChannelSalesManager(),
       ),
       MenuItem(
         title: 'Issue List',