fix: 修复图片上传回显、登录认证和API路径问题

- 修复上传图片响应解析，正确处理 Arco Upload 返回的 response 对象
- 修复后端 AuthInterceptor 路径匹配，正确放行 /api/auth/login 等公开接口
- 统一前端 API 路径配置，移除重复 /api 前缀
- 添加 /uploads 静态资源代理配置
- 修复图片 URL 生成，添加 origin 前缀确保回显正常

frontend/src/views/admin/AdminProducts.vue

@@ -145,13 +145,22 @@ const beforeUpload = (file) => {
   return true
 }
 
-const onUploadSuccess = (response) => {
-  if (response && response.data) {
-    productForm.imageUrl = response.data
-    Message.success('图片上传成功')
-  } else if (typeof response === 'string') {
-    productForm.imageUrl = response
+const onUploadSuccess = (uploadInfo) => {
+  const response = uploadInfo.response
+  console.log('Upload server response:', response)
+  if (response && response.code === 0 && response.data) {
+    const imageUrl = response.data
+    console.log('Image URL from response:', imageUrl)
+    if (imageUrl.startsWith('/')) {
+      productForm.imageUrl = window.location.origin + imageUrl
+    } else {
+      productForm.imageUrl = imageUrl
+    }
+    console.log('Final imageUrl:', productForm.imageUrl)
     Message.success('图片上传成功')
+  } else {
+    console.warn('Unexpected response format:', response)
+    Message.warning('上传成功，但无法解析图片地址')
   }
 }