Fixed empty reply bug

api/llm.py

@@ -141,6 +141,8 @@ class LLMManager:
             for m in split_messages:
                 if m.strip():
                     chat_display.append([None, m])
+            if len(chat_display) == original_len:
+                chat_display.append([None, ""])
 
             yield chat_history, chat_display, code
 

tests/candidate.py

@@ -95,9 +95,9 @@ def complete_interview(
             response_content = "".join(random.choices(string.ascii_letters + string.digits, k=50))
         elif mode == "repeat":
             response_content = chat_display[-1][1]
-        else:  # normal mode
+        else:
             response = client.chat.completions.create(
-                model=model, messages=messages_candidate, temperature=1, response_format={"type": "json_object"}
+                model=model, messages=messages_candidate, temperature=1, response_format={"type": "json_object"}, stream=False
             )
             response_json = json.loads(response.choices[0].message.content)
             response_content = response_json.get("message", "")

tests/test_e2e.py

@@ -26,7 +26,7 @@ def test_complete_interview() -> None:
     interview_types = ["ml_design", "math", "ml_theory", "system_design", "sql", "coding"]
     scores: List[float] = []
 
-    with ThreadPoolExecutor(max_workers=3) as executor:
+    with ThreadPoolExecutor(max_workers=2) as executor:
         # Test normal interviews
         futures = [executor.submit(complete_and_grade_interview, it) for it in interview_types]