fix AF-2572
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a Meetings welcome page with a beta disclaimer and "Get Started" flow.
- Added separate toggles for AI auto summary and AI auto todo list in meeting settings.
- Added "Beta" labels to relevant settings and sidebar items for clearer feature status.
- Enhanced settings UI with improved headers, subtitles, and new styling.
- **Improvements**
- Meeting settings now allow independent control over AI-generated summaries and todo lists.
- Updated internationalization to support new meeting and AI transcription features, including richer prompts and hints.
- Refined logic for enabling meeting recording, including improved permission handling.
- Simplified transcription logic to rely solely on AI enablement flag.
- **Bug Fixes**
- Fixed display and control of meeting settings based on beta disclaimer acceptance.
- **Chores**
- Updated localization files and completeness percentages for several languages.
- Removed deprecated feature flag for enabling meetings.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
using a [babel plugin](https://gist.github.com/pengx17/49e24ae8a5a609bdaff122ee8c679d1c) to transform all var(--affine-xxx) to cssVar
Some issues:
- tried ast-grep but it seems to be not easy to add imports conditionally
- current work does not work well with ts with types because babel will strip them out
pengx17
