fix(streaming): 修正流式输出的端点URL和防缓冲header

前端：
- kieaiGeminiChatStream URL 从 /gemini/chat 改为 /gemini/chat/stream
  （后者声明了 produces=text/event-stream，nginx 不会缓冲）
- 请求 header 增加 Accept: text/event-stream

后端：
- KieAIController.geminiChatStream 补充防缓冲 header：
  X-Accel-Buffering: no + Cache-Control: no-cache
  （与 CozeController.chatStream 对齐，防止 nginx 缓冲 SSE）

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

msh_crmeb_22/crmeb-front/src/main/java/com/zbkj/front/controller/KieAIController.java

@@ -17,6 +17,7 @@ import com.zbkj.service.service.tool.ToolSora2Service;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import io.swagger.annotations.ApiParam;
+import javax.servlet.http.HttpServletResponse;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -86,7 +87,11 @@ public class KieAIController {
      */
     @PostMapping(value = "/gemini/chat/stream", produces = "text/event-stream")
     @ApiOperation(value = "Gemini 2.5 Flash 流式对话", notes = "使用 SSE 实时推送响应")
-    public SseEmitter geminiChatStream(@RequestBody @Validated KieAIGeminiChatRequest request) {
+    public SseEmitter geminiChatStream(@RequestBody @Validated KieAIGeminiChatRequest request,
+                                       HttpServletResponse response) {
+        // 防止 nginx 缓冲 SSE 响应（与 CozeController.chatStream 对齐）
+        response.setHeader("X-Accel-Buffering", "no");
+        response.setHeader("Cache-Control", "no-cache");
         request.setStream(true);
         return toolKieAIService.geminiChatStream(request);
     }

msh_single_uniapp/api/models-api.js

@@ -457,12 +457,15 @@ function kieaiGeminiChatStream(data) {
   }
 
   const token = store.state && store.state.app && store.state.app.token
+  // 使用专用流式端点 /chat/stream（声明了 produces=text/event-stream），
+  // 而非 /chat + stream=true，避免 nginx 缓冲 SSE 响应导致流式失效
   _task = uni.request({
-    url: `${API_BASE_URL}/api/front/kieai/gemini/chat`,
+    url: `${API_BASE_URL}/api/front/kieai/gemini/chat/stream`,
     method: 'POST',
     data: { messages, stream: true },
     header: {
       'Content-Type': 'application/json',
+      'Accept': 'text/event-stream',
       ...(token ? { [TOKENNAME]: token } : {})
     },
     enableChunked: true,