factor:布局颜色重构

lib/layout/app_body.dart

@@ -0,0 +1,58 @@
+import 'package:flisp_app/pages/calendar_page.dart';
+import 'package:flisp_app/pages/flisp_page.dart';
+import 'package:flisp_app/pages/stats_page.dart';
+import 'package:flisp_app/pages/todo_page.dart';
+import 'package:flisp_app/provider/app_provider.dart';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+class AppBody extends StatefulWidget {
+  const AppBody({super.key});
+
+  @override
+  State<AppBody> createState() => AppBodyState();
+}
+
+class AppBodyState extends State<AppBody> {
+  final GlobalKey<FlispPageState> _flispPageKey = GlobalKey();
+  final GlobalKey<TodoPageState> _todoPageKey = GlobalKey();
+  final GlobalKey<CalendarPageState> _calendarPageKey = GlobalKey();
+
+  Widget _buildPage(int index) {
+    switch (index) {
+      case 0:
+        return FlispPage(key: _flispPageKey);
+      case 1:
+        return TodoPage(key: _todoPageKey);
+      case 2:
+        return CalendarPage(key: _calendarPageKey);
+      case 3:
+        return StatsPage();
+      default:
+        return FlispPage(key: _flispPageKey);
+    }
+  }
+
+  void showPageAddDialog(int index) {
+    if (index == 0) {
+      if (_flispPageKey.currentState != null) {
+        _flispPageKey.currentState!.showAddDialog();
+      }
+    } else if (index == 1) {
+      if (_todoPageKey.currentState != null) {
+        _todoPageKey.currentState!.showAddDialog();
+      }
+    } else if (index == 2) {
+      if (_calendarPageKey.currentState != null) {
+        _calendarPageKey.currentState!.showAddDialog();
+      }
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final appProvider = context.watch<AppProvider>();
+
+    return _buildPage(appProvider.currentTab);
+  }
+}