移除Host头验证中间件及相关逻辑，简化OAuth相关API的请求处理，优化代码结构和可读性。

app/api/files/files-upload.ts

@@ -171,11 +171,15 @@ export async function uploadContractTemplate(
     const uploadUrl = `${UPLOAD_URL}/upload_contract_template`;
     console.log('【合同模板上传】准备发送请求到服务器:', uploadUrl);
     
-    // 设置请求头（按需去掉JWT认证）
+    // 设置请求头
     const headers: HeadersInit = {
       'Accept': 'application/json'
     };
     
+    if (jwtToken) {
+      headers['Authorization'] = `Bearer ${jwtToken}`;
+    }
+    
     // 发送请求
     const response = await fetch(uploadUrl, {
       method: 'POST',
@@ -251,11 +255,15 @@ export async function appendContractAttachments(
     const uploadUrl = `${UPLOAD_URL}/contracts/${documentId}/append_attachments`;
     console.log('【合同附件追加】准备发送请求到服务器:', uploadUrl);
     
-    // 设置请求头（根据需求，附件追加不做JWT认证）
+    // 设置请求头
     const headers: HeadersInit = {
       'Accept': 'application/json'
     };
     
+    if (jwtToken) {
+      headers['Authorization'] = `Bearer ${jwtToken}`;
+    }
+    
     // 发送请求
     const response = await fetch(uploadUrl, {
       method: 'POST',
@@ -349,16 +357,12 @@ export async function uploadDocumentToServer(
     // const response = await fetch(`${API_BASE_URL}/admin/documents/upload`, {
     try {
       // console.log('【调试】开始fetch请求...');
-      const headers: HeadersInit = {
-        'X-File-Name': encodeURIComponent(fileName),
-        'Accept': 'application/json'
-      };
-      if (jwtToken) {
-        headers['Authorization'] = `Bearer ${jwtToken}`;
-      }
       const response = await fetch(uploadUrl, {
         method: 'POST',
-        headers,
+        headers: {
+          'X-File-Name': encodeURIComponent(fileName),
+          'Authorization': `Bearer ${jwtToken || ''}`
+        },
         body: formData
       });