### What problem does this PR solve?
- Unify top level pages structure
- Standardize locale language codes (BCP 47) and time zones (IANA tz)
> **Note:**
> Newly created user info brings non-standard default values `timezone:
"UTC+8\tAsia/Shanghai"` and `language: "English"`.
### Type of change
- [x] Refactoring
### What problem does this PR solve?
- Adjust UI styles in **Dataset** pages.
- Adjust several shared components styles
- Modify files and directory structure in `src/layouts`
### Type of change
- [x] Refactoring
### What problem does this PR solve?
This PR adds end-to-end Arabic support in production. It also adds a
full Arabic README
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
- [x] Documentation Update
### What problem does this PR solve?
Necessary ids for implementing the new testing suite with playwright for
UI
### Type of change
- [x] Other (please describe): Testing IDs
Co-authored-by: Liu An <asiro@qq.com>
### What problem does this PR solve?
Fix:Optimize metadata and optimize the empty state style of the agent
page.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Features: Memory page rendering and other bug fixes
- Rendering of the Memory list page
- Rendering of the message list page in Memory
- Fixed an issue where the empty state was incorrectly displayed when
search criteria were applied
- Added a web link for the API-Key
- modifying the index_mode attribute of the Confluence data source.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Fix: Added styles for empty states on the page.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
- Modify and adjust styles (CSS vars, components) to match the design
system
- Adjust file and directory structure of admin UI
### Type of change
- [x] Refactoring
### What problem does this PR solve?
Add whitelist management and role management in Admin UI
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Fix: Optimized the test results page layout and internationalization
- Added an empty data component for when test results are empty
- Optimized internationalization support for the paging component
- Updated the layout and style of the test results page
- Added a tooltip for when test results are empty
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
