fix output issue 4 ui (#50)

Author: depenglee1707

llmserve/backend/llm/predictor.py

@@ -459,7 +459,7 @@ def slice_prompts(worker_num: int, worker_index: int, prompts: list[str]):
                         for worker in self.base_worker_group
                     ]
                 )
-            )
+            )[0]
 
             return prediction
 

llmserve/backend/server/app.py

@@ -423,7 +423,7 @@ async def query(self, *args) -> Dict[str, Dict[str, Any]]:
         )
         logger.info(f"ExperimentalDeployment query.results {results}")
         results = results[0]
-        return results
+        return results.generated_text
 
     def _chose_ui(self) -> Callable:
         logger.info(