### What problem does this PR solve?
fix: fix uploaded file time error #680
feat: support preview of word and excel #684
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
#666
feat: support DeepSeek
feat: preview word and excel
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: handle operator drag
feat: add FlowCanvas
#592
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
fix: cannot save the system model setting #468 (#508)
### What problem does this PR solve?
fix: cannot save the system model setting #468
feat: rename file in FileManager
feat: add FileManager
feat: override useSelector type
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
fix: replace some pictures of chunk method #437 (#438)
### What problem does this PR solve?
some chunk method pictures are not in English #437
feat: set the height of both html and body to 100%
feat: add SharedChat
feat: add shared hooks
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
feat: Modify the color of the svg icon in the header according to the selected state and feat: extract routing information from the knowledge base into constants (#51)
* feat: Modify the color of the svg icon in the header according to the selected state
* feat: add translation icon to header
* feat: shorten the route length of the knowledge base
* feat: extract routing information from the knowledge base into constants
balibabu