### What problem does this PR solve?

Feat: Modify the link address of the agent id #3909

### Type of change


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

### What problem does this PR solve?

Feat: Modify the text of the embedded website button #3909

### Type of change

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

### What problem does this PR solve?

Feat: Modify the data structure of the chunk in the conversation #3909

### Type of change


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

### 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)

### 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?

fix: the site domain name in the Chat Bot API is hardcoded. #776

### Type of change

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

### What problem does this PR solve?

feat: delete the added model #503
feat: display an error message when the requested file fails to parse
#684

### 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)