gemini插头不返回done，防止客户端报错

src/server/handlers/gemini.js

@@ -193,7 +193,7 @@ export const handleGeminiRequest = async (req, res, modelName, isStream) => {
           const chunk = createGeminiResponse(content, null, null, null, 'STOP', usage);
           writeStreamData(res, chunk);
           clearInterval(heartbeatTimer);
-          endStream(res);
+          endStream(res, false);
           return;
         }
         

src/server/stream.js

@@ -108,9 +108,9 @@ export const writeStreamData = (res, data) => {
  * 结束流式响应
  * @param {Response} res - Express响应对象
  */
-export const endStream = (res) => {
+export const endStream = (res, isWriteDone = true) => {
   if (res.writableEnded) return;
-  res.write(SSE_DONE);
+  if (isWriteDone) res.write(SSE_DONE);
   res.end();
 };