### What problem does this PR solve?
[remarkjs/react-markdown/issues/785](https://github.com/remarkjs/react-markdown/issues/785)
Fix: Fixed an issue where math formulas could not be displayed correctly
#4405
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Feat: Support for formulas #1954
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: API access key management #2846
feat: Render markdown file with remark-loader #2846
### Type of change
- [ ] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):
### What problem does this PR solve?
feat: Modify the style of the answer card on the search page #2247
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Wrap the searched chunk with a Popover #2247
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Show prompt send to LLM for assistant answer #2098
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Embed the chat window into other websites through iframe
#345
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
