feat(intake): structured per-service intake questions

Services declare up to 8 intake fields (text/yesno, required) stored
as JSONB; shared/intake.go is the single normalization point — slug
keys, label/dup/unknown-key rules, yes/no canonicalization. Booking
create validates answers against the service declaration (missing
required -> 400), unknown keys are dropped before persist.

Answers surface on UpcomingBooking and CustomerBookingView; the
services page gains a compact editor and the public form renders
declared questions under contact details. Verified live end-to-end.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/backend/internal/bookings/service.go

@@ -221,6 +221,7 @@ func (s *Service) Catalog(ctx context.Context, tenantSlug string) (domain.Public
 			Name:            service.Name,
 			DurationMinutes: service.DurationMinutes,
 			PriceCents:      service.PriceCents,
+			IntakeFields:    shared.ParseIntakeFields(service.IntakeFields),
 		})
 	}
 	for _, staff := range staffRecords {
@@ -283,6 +284,7 @@ func (s *Service) Create(ctx context.Context, request domain.CreateBookingReques
 
 	status := "confirmed"
 	activityLabel := ""
+	intakeJSON := "{}"
 	switch request.BookingMode {
 	case "appointment":
 		if request.ServiceID == nil || request.ClassSessionID != nil {
@@ -295,6 +297,10 @@ func (s *Service) Create(ctx context.Context, request domain.CreateBookingReques
 		if !ok {
 			return domain.CreateBookingResponse{}, fmt.Errorf("%w: serviceId is not available for tenant", ErrInvalidBooking)
 		}
+		intakeJSON, err = shared.NormalizeIntakeAnswers(shared.ParseIntakeFields(service.IntakeFields), request.Intake)
+		if err != nil {
+			return domain.CreateBookingResponse{}, fmt.Errorf("%w: %s", ErrInvalidBooking, err.Error())
+		}
 		activityLabel = service.Name
 		expectedDuration := time.Duration(service.DurationMinutes) * time.Minute
 		if !startsAt.Add(expectedDuration).Equal(endsAt) {
@@ -350,6 +356,7 @@ func (s *Service) Create(ctx context.Context, request domain.CreateBookingReques
 		Reference:      db.Reference("BK", time.Now()),
 		ManageToken:    generateManageToken(),
 		Notes:          notes,
+		Intake:         intakeJSON,
 	})
 	if err != nil {
 		if db.IsExclusionViolation(err) {
@@ -565,6 +572,7 @@ func (s *Service) DashboardSummary(ctx context.Context, principal domain.Princip
 			CustomerName:   booking.CustomerName,
 			CustomerEmail:  booking.CustomerEmail,
 			Notes:          booking.Notes,
+			Intake:         shared.ParseIntakeAnswers(booking.Intake),
 			StartsAt:       booking.StartsAt,
 			EndsAt:         booking.EndsAt,
 			Status:         booking.Status,