feat: 添加文章修改保存功能及首页入口

server/llm.js

@@ -78,8 +78,7 @@ export const streamChat = async ({
   appId,
   messages,
   options,
-  res,
-  signal
+  res
 }) => {
   const provider = providers[providerId];
 
@@ -107,19 +106,31 @@ export const streamChat = async ({
 
   const headers = buildHeaders({ ...provider, appId: appId || provider.appId });
 
-  const response = await fetch(provider.apiUrl, {
-    method: 'POST',
-    headers,
-    body: JSON.stringify(payload),
-    signal
-  });
+  console.log('LLM 代理: 发起请求', { providerId, model: payload.model, apiUrl: provider.apiUrl });
+
+  let response;
+  try {
+    response = await fetch(provider.apiUrl, {
+      method: 'POST',
+      headers,
+      body: JSON.stringify(payload)
+    });
+  } catch (fetchError) {
+    console.error('LLM 代理: Fetch 错误', fetchError);
+    if (!res.headersSent) {
+      res.status(500).json({ success: false, error: fetchError.message || '网络请求失败' });
+    }
+    return;
+  }
 
   if (!response.ok) {
     const errorText = await response.text();
+    console.error('LLM 代理: 上游响应错误', response.status, errorText);
     res.status(500).json({ success: false, error: errorText || `上游请求失败: ${response.status}` });
     return;
   }
 
+  console.log('LLM 代理: 开始流式响应');
   res.status(200);
   res.setHeader('Content-Type', 'text/event-stream; charset=utf-8');
   res.setHeader('Cache-Control', 'no-cache');
@@ -131,6 +142,7 @@ export const streamChat = async ({
     res.write(chunk);
   });
   readable.on('end', () => {
+    console.log('LLM 代理: 流式响应完成');
     res.end();
   });
   readable.on('error', (error) => {
@@ -138,3 +150,4 @@ export const streamChat = async ({
     res.end();
   });
 };
+