feat:增加公共组件

lib/widget/common_widget.dart

@@ -0,0 +1,66 @@
+import 'package:flutter/material.dart';
+
+class CommonCard extends StatelessWidget {
+  final Widget? child;
+
+  const CommonCard({super.key, this.child});
+
+  @override
+  Widget build(BuildContext context) {
+    final colors = Theme.of(context).colorScheme;
+
+    return Container(
+      decoration: BoxDecoration(
+        color: colors.surfaceContainer,
+        borderRadius: BorderRadius.circular(12),
+      ),
+      padding: const EdgeInsets.all(16),
+      child: child,
+    );
+  }
+}
+
+class CircleIconButton extends StatelessWidget {
+  final IconData icon;
+  final VoidCallback onPressed;
+
+  const CircleIconButton(
+      {super.key, required this.icon, required this.onPressed});
+
+  @override
+  Widget build(BuildContext context) {
+    final colors = Theme.of(context).colorScheme;
+
+    return ElevatedButton(
+      onPressed: onPressed,
+      style: ElevatedButton.styleFrom(
+        shape: CircleBorder(),
+        elevation: 0,
+        backgroundColor: colors.primary,
+        padding: EdgeInsets.zero,
+        minimumSize: const Size(0, 0),
+      ),
+      child: Icon(icon, color: Colors.white),
+    );
+  }
+}
+
+
+Widget buildErrorInfo({
+  required String errorInfo,
+  required VoidCallback onPressed,
+}) {
+  return Center(
+    child: Column(
+      mainAxisAlignment: MainAxisAlignment.center,
+      children: [
+        Text('加载失败: $errorInfo'),
+        ElevatedButton(onPressed: onPressed, child: Text('重试')),
+      ],
+    ),
+  );
+}
+
+Widget buildLoadingIndicator() {
+  return Center(child: CircularProgressIndicator());
+}