Guard against possibly-undefined results from Drizzle .returning()
destructuring — use indexed access + explicit null checks instead of
array destructuring for the recurring_series insert, and add an early
throw when the series or first appointment row is missing.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
Implements GitHub issue #9 — recurring appointment scheduling with
configurable frequency and cascade edit/cancel options.
Changes:
- DB: add `recurring_series` table (frequency_weeks) and series_id /
series_index columns on appointments (migration 0003)
- API POST /appointments: accepts optional `recurrence` object
(frequencyWeeks + count) that creates a full series in one transaction
- API PATCH /appointments/🆔 new `cascadeMode` field
(this_only | this_and_future | all) applies time-delta shifts and
field updates across the series
- API DELETE /appointments/🆔 new `?cascade=` query param cancels
this_only / this_and_future / all series members
- Frontend: booking form gains a "Recurring appointment" checkbox with
frequency and count pickers; calendar chips show a ↻ recurring label;
detail modal shows "Recurring series" badge and a cascade-delete radio
picker for series appointments
Co-Authored-By: Paperclip <noreply@paperclip.ing>
Groom Book CTO