fix(profile): 显示匿名用户当用户名为空时

@@ -19,7 +19,7 @@
               @error="handleImageError"
             />
           </div>
-          <h2 class="text-2xl font-bold mb-1">{{ profile.name }}</h2>
+          <h2 class="text-2xl font-bold mb-1">{{ profile.name || '匿名用户' }}</h2>
           <!-- <div class="flex items-center text-sm text-gray-600">
             <span>会员等级: 普通会员</span>
             <span class="mx-2">|</span>