Standalone buttons:
- Add ExternalLink button to Dms, Calendar, Mail, ContactsList toolbars
- Create standalone pages for each (no sidebar, full screen)
- Add standalone routes outside ProtectedRoute
Window system for modals:
- AppointmentModal -> AppointmentEditForm + openWindow()
- ComposeModal -> MailComposeForm + openWindow()
- FilePreviewModal -> FilePreviewContent + openWindow()
- Calendar, Mail, Dms use openWindow() instead of modal state
- 0.5: Moved calendarStore.ts from stores/ to store/, removed stores/ dir, updated import
- 0.6: Saved complete frontend gap analysis as frontend-gap-analysis.md (176 lines)
- All stores now in src/store/ (5 stores: authStore, uiStore, commStore, pluginToolbarStore, calendarStore)