### What problem does this PR solve?

feat: Create a conversation before uploading files in it #1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: Delete the files uploaded in the external dialog box #1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: Delete the file from the upload control of the message input box
#1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: Supports chatting with files/images #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)

### What problem does this PR solve?

feat: change all file names to lowercase #1574

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: format code before submitting it #1251 

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

Knowledge base management supports crawling information from web pages
and generating PDF documents

### Type of change
- [x] New Feature (Support document from web pages)

### 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?

fix: add spin to parsing status icon of dataset table
#648 

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?

fix:  #567 use modal to upload files in the knowledge base

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?
#345
feat: translate FileManager
feat: batch delete files from the file table in the knowledge base

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

document list needs to be batch operated


Issue link: #301

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

* feat: select the corresponding parsing method according to the file type

* feat: after the document is successfully uploaded, use the ChunkMethodModal  to select the parsing method.

* feat: add pdf types to ParserListMap

* feat: remove ChunkMethodModal from knowledge-file

* fix: by obtaining the width and height of the pdf and passing it to boundingRect, the problem of inaccurate positioning of file highlighting is fixed

* feat: remove actualPositions from buildChunkHighlights

* feat: add hooks for document table

* refactor: refactor document-related modal

* feat: Remove duplicate \n from record.progress_msg

* feat: add DocumentPreviewer for chunk of chat reference