Feature recurring appointments

[adamspd]

Add recurring appointments feature

What changed

• Added full recurring appointments functionality with daily, weekly, and monthly patterns
• Calendar selection auto-syncs with recurring settings (until date and day picker)
• Added toggle switch, day picker, and preview text in UI
• Recurring appointments block slots and appear in email notifications
• Added admin interface for managing recurring appointment records

Core functionality

• RecurringAppointment model: Stores recurrence rules using django-recurrence
• Slot exclusion: Prevents double-booking recurring appointment times
• Form validation: Requires end date and day selection for weekly recurring
• ICS integration: Calendar files include RRULE for recurring events
• Email updates: All appointment emails show recurrence details

UI improvements

• Compact day picker for weekly selection
• Live preview shows "Every week on Monday, Wednesday until June 11th, 2025"
• Preview appears in both config panel and service details
• Auto-updates when calendar date changes

Technical details

• Uses django-recurrence for RRULE parsing and date calculations
• Added Config.max_recurring_months (default: 3 months)
• Enhanced appointment exclusion logic in slot calculation
• Updated all email templates to show recurrence info
• Added proper form validation and error handling

Files changed

• models.py - Added RecurringAppointment model
• forms.py - Added recurring fields to AppointmentRequestForm
• views.py - Handle recurring appointment creation
• services.py - Exclude recurring slots from availability
• templates/ - Updated all email templates and appointment form
• static/ - New CSS and JS for recurring UI
• utils/ - Enhanced ICS generation and email context

Dependencies

• Added django-recurrence>=1.11.1

What needs to be done

• Tests
• User can only choose daily recurrence if staff member works daily and the slot time is free until the end date.