## Summary
- Add `useIcalDownload` composable generating RFC 5545 VEVENT files
- Add slugify utility for filename sanitization
- Integrate calendar download button into RsvpBar and organizer kebab menu
- Unify header as fixed top bar with action slot
- Extract shared bar component CSS
## Test plan
- [x] Unit tests for `useIcalDownload` composable
- [x] Unit tests for `slugify` utility
- [x] Updated `RsvpBar` and `EventDetailView` unit tests
- [x] E2E tests for iCal download flow
- [x] E2E tests updated for kebab menu changes
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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Summary
useIcalDownloadcomposable generating RFC 5545 VEVENT filesTest plan
useIcalDownloadcomposableslugifyutilityRsvpBarandEventDetailViewunit tests🤖 Generated with Claude Code