### What problem does this PR solve?
Feat: Support preview of HTML files #5096
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Import & export the agents. #3851
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Add tooltip to question item of ChunkCreatingModal #3873
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
https://github.com/infiniflow/ragflow/issues/3651
### What problem does this PR solve?
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Feat: Translate comments of file-util.ts to English #3749
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
The uploaded avatar has been compressed to preserve transparency while
meeting the length requirements for the 'text' type. The current
compressed size is 100x100 pixels.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### 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: Set the default value of Self RAG to false #1220
fix: Change all tool file names to kebab format
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
