### What problem does this PR solve?
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._
### Type of change
- [X] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Related source file is in Windows/DOS format, they are format to Unix
format.
### Type of change
- [x] Refactoring
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
* feat: remove unnecessary 'loading' fields from other files
* feat: layout the knowledge list page
* feat: modify the page switching button in the header
