Flutter :如何使容器固定在顶部包含自定义标签

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Fixed Container with Custom Tabs'),
      ),
      body: Column(
        children: [
          Container(
            color: Colors.blue,
            height: 100,
            child: Center(
              child: Text(
                'Custom Tab',
                style: TextStyle(
                  color: Colors.white,
                  fontSize: 24,
                ),
              ),
            ),
          ),
          Expanded(
            child: Container(
              color: Colors.white,
              child: Center(
                child: Text(
                  'Content',
                  style: TextStyle(
                    fontSize: 24,
                  ),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }
}