### What problem does this PR solve?
Fix: Switch the default theme from light mode to dark mode and improve
some styles #9869
-Update UI component styles such as input boxes, tables, and prompt
boxes
-Optimize login page layout and style details
-Revise some of the wording, such as uniformly changing "data flow" to
"pipeline"
-Adjust the parser to support the markdown type
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Fix: Optimized the login page and fixed some known issues. #9869
- Added the FlipCard3D component to implement a 3D flip effect on the
login/registration forms.
- Adjusted the Spotlight component to support custom positioning and
color configurations.
- Updated the route to point to the new login page /login-next.
- Added a cancel interface to the auto-generate function.
- Fixed scroll bar issues in PDF preview.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Refactor(login): Refactor the login page and add dynamic background and
highlight effects #9869
### Type of change
- [x] Refactoring
### What problem does this PR solve?
Feat: Add background to next login page #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Switch the login page to the registration component by changing
the routing parameters #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Add next login page with shadcn/ui #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
