feat:增加博客分类模块

lib/layout/drawer.dart

@@ -0,0 +1,79 @@
+import 'package:flutter/material.dart';
+
+import 'menu.dart';
+
+Widget buildDrawerHeader(BuildContext context) {
+  final colors = Theme.of(context).colorScheme;
+  return Container(
+    width: double.infinity,
+    height: 200,
+    decoration: BoxDecoration(
+      gradient: LinearGradient(
+        begin: Alignment.topLeft,
+        end: Alignment.bottomRight,
+        colors: [colors.primary, colors.inversePrimary],
+      ),
+    ),
+    child: SafeArea(
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          ClipOval(
+            child: Image.asset(
+              'assets/images/avatar.jpg',
+              width: 80,
+              height: 80,
+              fit: BoxFit.cover,
+            ),
+          ),
+          SizedBox(height: 16),
+          Text(
+            'Cxx0822',
+            style: TextStyle(
+              color: Colors.white,
+              fontSize: 20,
+              fontWeight: FontWeight.bold,
+            ),
+          ),
+        ],
+      ),
+    ),
+  );
+}
+
+Widget buildDrawerItem({
+  required BuildContext context,
+  required PageInfo page,
+  required VoidCallback onTap,
+  required bool isSelected,
+}) {
+  final colors = Theme.of(context).colorScheme;
+
+  return Container(
+    margin: EdgeInsets.symmetric(horizontal: 12, vertical: 4),
+    decoration: BoxDecoration(
+      color: isSelected ? colors.primary.withAlpha(50) : Colors.transparent,
+      borderRadius: BorderRadius.circular(12),
+    ),
+    child: ListTile(
+      leading: Icon(
+        page.icon,
+        color: isSelected ? colors.primary : Colors.grey[700],
+        size: 24,
+      ),
+      title: Text(
+        page.title,
+        style: TextStyle(
+          color: isSelected ? colors.primary : Colors.grey[800],
+          fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
+          fontSize: 16,
+        ),
+      ),
+      trailing:
+          isSelected
+              ? Icon(Icons.arrow_forward_ios, size: 16, color: colors.primary)
+              : null,
+      onTap: onTap,
+    ),
+  );
+}

lib/layout/menu.dart

@@ -0,0 +1,16 @@
+import 'package:flutter/material.dart';
+
+class PageInfo {
+  final String title;
+  final IconData icon;
+
+  const PageInfo({required this.title, required this.icon});
+}
+
+final List<PageInfo> pages = [
+  PageInfo(title: '博客', icon: Icons.article),
+  PageInfo(title: '分类', icon: Icons.folder),
+  PageInfo(title: '个人中心', icon: Icons.person),
+  PageInfo(title: '设置', icon: Icons.settings),
+  PageInfo(title: '关于我们', icon: Icons.info),
+];