Update app.py

app.py

@@ -331,7 +331,7 @@ def process_image_background(task_id, image_data):
             # Using "gemini-1.5-pro-latest" as a robust alternative. User can change if needed.
             # The user's original Gemini call structure:
             gemini_response = client.models.generate_content(
-                model="gemini-1.5-pro-latest", 
+                model="gemini-2.5-pro-exp-03-25", 
                 contents=[
                     {'inline_data': {'mime_type': 'image/png', 'data': img_base64_str}},
                     ppmqth