Address GitHub issue #13 (events not spanning real duration, hour label alignment)
and add five standard calendar UX features:
- Click-drag on empty time slots to create events with pre-filled time range
- Resize events by dragging bottom edge handle (15-min snap, optimistic JMAP update)
- Recurring event edit/delete scope dialog (this/following/all occurrences)
- Double-click quick create with inline title input (PT1H default)
- Event duplication button in modal (clones +1 day, opens for editing)
Shared interaction logic extracted to hooks/use-time-grid-interactions.ts.
All features include i18n (8 locales), accessibility (ARIA, pointer events),
and proper error handling with toast feedback.
- Add ConfirmDialog component with promise-based useConfirmDialog hook
- Add WelcomeBanner onboarding component with localStorage persistence
- Add NavigationRail (desktop icon rail + mobile bottom tab bar)
- Polish login form (shake on error, TOTP slide, password visibility, session expired banner)
- Add inline form validation with shake animation in email composer and contacts
- Add empty state patterns for contacts (no data vs no search results)
- Improve toast system with undo action support and typed durations
- Add template settings tab to settings page
- Refactor sidebar (cleaner code, remove unused imports)
- Add WCAG AA reduced-motion, safe area insets, sr-only live region
- Add shake/slide animations in globals.css
- Update i18n for all 8 locales
Matthieu MALVACHE