### TL;DR
* refactor: use horizontal scrolling to display images
* refactor: change max images to 9
* test: add test cases for validating the maximum number of uploadable images
> CLOSE AI-6

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Added a notification to inform users when attempting to upload more images than allowed in the AI chat input.
- **Bug Fixes**
- Prevented uploading more than 9 images at once in the AI chat input.
- **Style**
- Improved image preview grid layout to display images in a single horizontally scrollable row.
- **Tests**
- Added an end-to-end test to verify that an error message appears when too many images are uploaded.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->