### 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?

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)

### What problem does this PR solve?

change language

Issue link: #245



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

feat: remove showDeleteConfirm function
feat: center the Empty of knowledge list
feat: extract the text of the login page to en.json
#204

feat: enlarge the size of the next button for uploading files
feat: add locale config to global.ts

* feat: add llm type to Added models List

* feat: alter tooltip of base_url

* feat: add background image to login page

* feat: fixed the issue where the next button would float above the file list on the file upload page.

* feat: fixed the issue where the last message would keep loading if the backend reported an error during chat.

* fix: fixed the issue that the prompt word for registering an account is not in English

* feat: if it is not a pdf file, set the width of chunkContainer to 100%

* feat: login with github

* feat: remove unnecessary 'loading' fields from other files

* feat: layout the knowledge list page

* feat: modify the page switching button in the header

* feat: use DvaModel instead of redundant types such as kAModelType

* feat: set the type for registerServer

* feat: remove loading from model

* set port

* add knowledge-search

* update text

* update typescript

* add chunk api

* remove useless code