Update main.py

main.py

@@ -139,7 +139,7 @@ def analyze_image_with_text(image_path: str, user_text: str) -> str:
             return "錯誤：找不到該圖片檔案。"
         img_user = PIL.Image.open(image_path)
         response = genai_client.models.generate_content(
-            model="gemini-3-flash-preview",
+            model="gemini-3-flash-lite-preview",
             contents=[img_user, user_text]
         )
         return response.text if response.text else "Gemini 沒答案！"