4cd88ba477
kling-o1-pro and kling-o1-std silently fail when aspect_ratio is included in the payload — they derive it from the input image. Added VIDEO_ASPECT_RATIO_MODELS whitelist so only kling-elements and minimax-hailuo receive the parameter. Also switched image_to_base64 to use Pillow for format detection instead of trusting the file extension, which correctly handles files saved with the wrong extension. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>