Update answer on stack of array

app.py

@@ -114,9 +114,15 @@ def call_gemini(prompt: str, vision_parts=None) -> str:
     resp = client.models.generate_content(
         model="gemini-2.5-flash-preview-04-17", **kwargs
     )
-    response = resp.text.strip()
-    logger.info(f"[LLM] Response: {response}")
-    return response
+    # Join all .text fields in case Gemini responds in multiple parts.
+    try:
+        text = "".join(part.text for part in resp.candidates[0].content.parts)
+    except Exception as e:
+        logger.error(f"[LLM] ❌ Failed to parse Gemini response: {e}")
+        raise RuntimeError("Gemini API response format error")
+    # Handle response
+    logger.info(f"[LLM] Response: {text}")
+    return text.strip()
 
 @app.post("/voice-transcribe")
 async def voice_transcribe(file: UploadFile = File(...)):