High-Res (2K/4K) Output for Gemini 3 Pro Image

Please add a parameter to allow image generation at 2K and 4K resolutions for Gemini 3 Pro Image. The current 1K limit holds back the model's potential for professional high-detail work. Having native high-resolution support would make Gemini a much stronger competitor against other image models and eliminate the need for external upscaling tools.