### What problem does this PR solve?
feat: Hide the upload button in the external agent's chat box #1880
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Add MessageInput to the external chat page #1880
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
fix: Error on chat api，<BadRequestKeyError '400: Bad Request'> #1918
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
feat: Expose the agent's chat window to third parties #1842
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
