gemini-next-chat: download ældre versioner

feat: The latest model list will be automatically pulled when the page is loaded
fix: Fix the problem of invalid regeneration
fix: Fixed the issue of abnormal layout of search references
fix: Models that don't support plugins no longer send tools settings

This update focuses on enhanced image and text capabilities and performance optimizations:
- New Image and Text Model: Added support for the gemini-2.0-flash-exp-image-generation model, which can generate content with mixed image and text layouts.
- Image Size Optimization: Generated images will be automatically compressed to reduce file size.
- Image Loading Optimization: Optimized image loading using lazy loading technology to reduce the impact of image rendering on text generation speed.
Now, you can experience richer image and text interaction and smoother content generation speed!

fixed: the issue that the client could not use real-time multimodal video and screen capture normally, and optimized the settings interface appropriately.