feat(bookings): dashboard cancellation and waitlist promotion

- POST /v1/catalog/bookings/{id}/cancel lets businesses cancel
  tenant-owned bookings; two-step confirm in the detail modal
- Shared PromoteWaitlist helper promotes earliest waitlisted bookings
  when a class seat frees, on both dashboard and customer cancel paths;
  promoted customers get a confirmation email, waitlist ledger marked
  resolved
- waitlisted status surfaced in bookings UI: stats card, filter, warning
  badge, demo seed, CS+EN strings
- BookingRecord gains created_at for fair ordering; GetBookingByID and
  ResolveWaitlistEntry added to the repository surface

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

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

apps/backend/internal/api/server.go

@@ -721,6 +721,21 @@ func NewServer(cfg config.Config, pools *db.Pools) (*Server, error) {
 		}
 		c.JSON(http.StatusCreated, response)
 	})
+	protected.POST("/catalog/bookings/:bookingID/cancel", func(c *gin.Context) {
+		err := catalogService.CancelBooking(c.Request.Context(), auth.PrincipalFromContext(c), c.Param("bookingID"))
+		if err != nil {
+			status := http.StatusInternalServerError
+			switch {
+			case errors.Is(err, catalog.ErrTenantMembership), errors.Is(err, catalog.ErrBookingNotFound):
+				status = http.StatusNotFound
+			case errors.Is(err, catalog.ErrInvalidInput):
+				status = http.StatusBadRequest
+			}
+			c.JSON(status, gin.H{"error": err.Error()})
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{"status": "cancelled"})
+	})
 
 	// ============================================
 	// CATALOG API - Blocked Days

apps/backend/internal/bookings/customer_service.go

@@ -26,6 +26,7 @@ type CustomerService struct {
 }
 
 type CustomerNotifier interface {
+	SendBookingConfirmation(ctx context.Context, data notifications.BookingEmailData) error
 	SendBookingReschedule(ctx context.Context, data notifications.BookingEmailData) error
 	SendBookingCancellation(ctx context.Context, data notifications.BookingEmailData) error
 }
@@ -42,6 +43,10 @@ func NewCustomerService(repo db.Repository, notifier CustomerNotifier, frontendU
 
 type customerNoopNotifier struct{}
 
+func (n *customerNoopNotifier) SendBookingConfirmation(ctx context.Context, data notifications.BookingEmailData) error {
+	return nil
+}
+
 func (n *customerNoopNotifier) SendBookingReschedule(ctx context.Context, data notifications.BookingEmailData) error {
 	return nil
 }
@@ -194,6 +199,15 @@ func (s *CustomerService) CancelBooking(ctx context.Context, reference string, t
 	// Send cancellation email (async)
 	go s.sendCancellationEmail(booking)
 
+	// A freed class seat promotes the earliest waitlisted booking.
+	if booking.ClassSessionID != nil {
+		if promoted, err := PromoteWaitlist(ctx, s.repo, booking.TenantID, *booking.ClassSessionID); err == nil {
+			for _, promotedBooking := range promoted {
+				go s.sendPromotionEmail(promotedBooking)
+			}
+		}
+	}
+
 	return nil
 }
 
@@ -270,3 +284,37 @@ func (s *CustomerService) sendCancellationEmail(booking db.BookingRecord) {
 
 	s.notifier.SendBookingCancellation(ctx, emailData)
 }
+
+// sendPromotionEmail confirms a booking that moved off the class waitlist.
+func (s *CustomerService) sendPromotionEmail(booking db.BookingRecord) {
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	tenant, err := s.repo.GetTenantByID(ctx, booking.TenantID)
+	if err != nil {
+		return
+	}
+	brand, _ := s.repo.GetBrandProfile(ctx, tenant.ID)
+	brandColor := brand.PrimaryColor
+	if brandColor == "" {
+		brandColor = "#a65c3e"
+	}
+	serviceName, locationName := s.descriptors(ctx, booking)
+
+	s.notifier.SendBookingConfirmation(ctx, notifications.BookingEmailData{
+		TenantID:      tenant.ID,
+		TenantName:    tenant.Name,
+		TenantSlug:    tenant.Slug,
+		BrandColor:    brandColor,
+		CustomerName:  booking.CustomerName,
+		CustomerEmail: booking.CustomerEmail,
+		Service:       serviceName,
+		Location:      locationName,
+		Reference:     booking.Reference,
+		StartsAt:      booking.StartsAt,
+		EndsAt:        booking.EndsAt,
+		Timezone:      tenant.Timezone,
+		Locale:        tenant.Locale,
+		ManagementURL: s.managementURL(booking),
+	})
+}

apps/backend/internal/bookings/lifecycle.go

@@ -0,0 +1,64 @@
+package bookings
+
+import (
+	"context"
+	"errors"
+	"sort"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+
+	"bookra/apps/backend/internal/db"
+)
+
+// PromoteWaitlist confirms the earliest waitlisted bookings on a class session
+// while free capacity remains. It returns the promoted records so callers can
+// notify customers. A missing session is treated as nothing to promote.
+func PromoteWaitlist(ctx context.Context, repo db.Repository, tenantID, sessionID string) ([]db.BookingRecord, error) {
+	session, err := repo.GetClassSessionByID(ctx, sessionID)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	bookings, err := repo.ListBookingsByTenantBetween(ctx, tenantID, session.StartsAt.Add(-time.Second), session.EndsAt.Add(time.Second))
+	if err != nil {
+		return nil, err
+	}
+
+	confirmed := 0
+	var waitlisted []db.BookingRecord
+	for _, booking := range bookings {
+		if booking.ClassSessionID == nil || *booking.ClassSessionID != sessionID {
+			continue
+		}
+		switch booking.Status {
+		case "confirmed":
+			confirmed++
+		case "waitlisted":
+			waitlisted = append(waitlisted, booking)
+		}
+	}
+	if len(waitlisted) == 0 {
+		return nil, nil
+	}
+	sort.SliceStable(waitlisted, func(i, j int) bool {
+		return waitlisted[i].CreatedAt.Before(waitlisted[j].CreatedAt)
+	})
+
+	var promoted []db.BookingRecord
+	for _, booking := range waitlisted {
+		if session.Capacity > 0 && confirmed >= int(session.Capacity) {
+			break
+		}
+		if err := repo.UpdateBookingStatus(ctx, booking.ID, "confirmed"); err != nil {
+			return promoted, err
+		}
+		_ = repo.ResolveWaitlistEntry(ctx, tenantID, sessionID, booking.CustomerEmail)
+		confirmed++
+		promoted = append(promoted, booking)
+	}
+	return promoted, nil
+}

apps/backend/internal/bookings/service_test.go

@@ -3,6 +3,8 @@ package bookings
 import (
 	"context"
 	"errors"
+	"fmt"
+	"net/url"
 	"testing"
 	"time"
 
@@ -399,3 +401,52 @@ func TestCreateAppointmentRejectsForeignStaff(t *testing.T) {
 		t.Fatalf("expected ErrInvalidBooking, got %v", err)
 	}
 }
+
+func TestCustomerCancelPromotesWaitlist(t *testing.T) {
+	repo := db.NewMemoryRepository()
+	service := NewService(repo, nil, "http://localhost:3000")
+	customerService := NewCustomerService(repo, nil, "http://localhost:3000")
+	ctx := context.Background()
+
+	session, err := repo.GetClassSessionByID(ctx, "4bf74c12-44dd-45ca-86bb-b104f16f2435")
+	if err != nil {
+		t.Fatalf("get session: %v", err)
+	}
+	sessionID := session.ID
+	book := func(email string) domain.CreateBookingResponse {
+		resp, err := service.Create(ctx, domain.CreateBookingRequest{
+			TenantSlug:     "studio-atelier",
+			BookingMode:    "class",
+			ClassSessionID: &sessionID,
+			CustomerName:   "Test User",
+			CustomerEmail:  email,
+			StartsAt:       session.StartsAt.UTC().Format(time.RFC3339),
+			EndsAt:         session.EndsAt.UTC().Format(time.RFC3339),
+		})
+		if err != nil {
+			t.Fatalf("book %s: %v", email, err)
+		}
+		return resp
+	}
+
+	var confirmed []domain.CreateBookingResponse
+	for i := 0; i < 4; i++ {
+		confirmed = append(confirmed, book(fmt.Sprintf("seat%[email protected]", i)))
+	}
+	waiter := book("[email protected]")
+	if waiter.Status != "waitlisted" {
+		t.Fatalf("expected waitlisted, got %s", waiter.Status)
+	}
+
+	// Customer cancels a confirmed seat via the management token.
+	manageURL, _ := url.Parse(confirmed[0].ManageURL)
+	token := manageURL.Query().Get("token")
+	if err := customerService.CancelBooking(ctx, confirmed[0].Reference, token); err != nil {
+		t.Fatalf("customer cancel: %v", err)
+	}
+
+	booking, _ := repo.GetBookingByID(ctx, waiter.BookingID)
+	if booking.Status != "confirmed" {
+		t.Fatalf("expected waiter promoted to confirmed, got %q", booking.Status)
+	}
+}

apps/backend/internal/catalog/service.go

@@ -11,6 +11,7 @@ import (
 	"bookra/apps/backend/internal/bookings"
 	"bookra/apps/backend/internal/db"
 	"bookra/apps/backend/internal/domain"
+	"bookra/apps/backend/internal/notifications"
 
 	"github.com/jackc/pgx/v5"
 )
@@ -39,6 +40,8 @@ type Service struct {
 	}
 	notificationService interface {
 		SendUsageWarning(ctx context.Context, tenantID string, locationCount, locationLimit, usagePercent int) error
+		SendBookingConfirmation(ctx context.Context, data notifications.BookingEmailData) error
+		SendBookingCancellation(ctx context.Context, data notifications.BookingEmailData) error
 	}
 }
 
@@ -46,6 +49,8 @@ func NewService(repo db.Repository, billingService interface {
 	GetEntitlements(ctx context.Context, tenantID string) (domain.PlanEntitlements, error)
 }, notificationService interface {
 	SendUsageWarning(ctx context.Context, tenantID string, locationCount, locationLimit, usagePercent int) error
+	SendBookingConfirmation(ctx context.Context, data notifications.BookingEmailData) error
+	SendBookingCancellation(ctx context.Context, data notifications.BookingEmailData) error
 }) *Service {
 	return &Service{repo: repo, billingService: billingService, notificationService: notificationService}
 }
@@ -1263,3 +1268,106 @@ func hhmm(value string) string {
 	}
 	return value
 }
+
+// ============================================
+// BOOKING LIFECYCLE
+// ============================================
+
+// CancelBooking cancels a tenant-owned booking from the dashboard. Cancelling a
+// class booking frees the seat and promotes the earliest waitlisted bookings.
+func (s *Service) CancelBooking(ctx context.Context, principal domain.Principal, bookingID string) error {
+	membership, err := s.repo.GetTenantMembershipBySubject(ctx, principal.Subject)
+	if err != nil {
+		return ErrTenantMembership
+	}
+
+	booking, err := s.repo.GetBookingByID(ctx, bookingID)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return ErrBookingNotFound
+		}
+		return err
+	}
+	if booking.TenantID != membership.Tenant.ID {
+		return ErrBookingNotFound
+	}
+	if booking.Status == "cancelled" {
+		return fmt.Errorf("%w: booking already cancelled", ErrInvalidInput)
+	}
+
+	if err := s.repo.UpdateBookingStatus(ctx, booking.ID, "cancelled"); err != nil {
+		return err
+	}
+
+	go s.sendBookingEmail(booking, false)
+
+	if booking.ClassSessionID != nil {
+		promoted, err := bookings.PromoteWaitlist(ctx, s.repo, booking.TenantID, *booking.ClassSessionID)
+		if err != nil {
+			return nil
+		}
+		for _, promotedBooking := range promoted {
+			go s.sendBookingEmail(promotedBooking, true)
+		}
+	}
+	return nil
+}
+
+// sendBookingEmail builds the shared payload and fires a confirmation
+// (promoted=true) or cancellation notification. Failures are logged-and-done:
+// email delivery must not fail the cancellation itself.
+func (s *Service) sendBookingEmail(booking db.BookingRecord, promoted bool) {
+	if s.notificationService == nil {
+		return
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	tenant, err := s.repo.GetTenantByID(ctx, booking.TenantID)
+	if err != nil {
+		return
+	}
+	brand, _ := s.repo.GetBrandProfile(ctx, tenant.ID)
+	brandColor := brand.PrimaryColor
+	if brandColor == "" {
+		brandColor = "#a65c3e"
+	}
+
+	var serviceName, locationName string
+	if booking.ServiceID != nil {
+		if service, err := s.repo.GetServiceByID(ctx, *booking.ServiceID); err == nil {
+			serviceName = service.Name
+		}
+	}
+	if booking.ClassSessionID != nil {
+		if session, err := s.repo.GetClassSessionByID(ctx, *booking.ClassSessionID); err == nil {
+			serviceName = session.Title
+		}
+	}
+	if booking.LocationID != nil {
+		if location, err := s.repo.GetLocationByID(ctx, *booking.LocationID); err == nil {
+			locationName = location.Name
+		}
+	}
+
+	data := notifications.BookingEmailData{
+		TenantID:      tenant.ID,
+		TenantName:    tenant.Name,
+		TenantSlug:    tenant.Slug,
+		BrandColor:    brandColor,
+		CustomerName:  booking.CustomerName,
+		CustomerEmail: booking.CustomerEmail,
+		Service:       serviceName,
+		Location:      locationName,
+		Reference:     booking.Reference,
+		StartsAt:      booking.StartsAt,
+		EndsAt:        booking.EndsAt,
+		Timezone:      tenant.Timezone,
+		Locale:        tenant.Locale,
+	}
+	if promoted {
+		s.notificationService.SendBookingConfirmation(ctx, data)
+	} else {
+		s.notificationService.SendBookingCancellation(ctx, data)
+	}
+}

apps/backend/internal/catalog/service_test.go

@@ -3,6 +3,7 @@ package catalog
 import (
 	"context"
 	"errors"
+	"fmt"
 	"testing"
 	"time"
 
@@ -547,3 +548,95 @@ func TestDeleteClassSessionPreservesBooking(t *testing.T) {
 		t.Fatal("expected booking class_session_id to be nulled")
 	}
 }
+
+const demoSessionID = "4bf74c12-44dd-45ca-86bb-b104f16f2435"
+
+func bookClass(t *testing.T, repo db.Repository, email string) domain.CreateBookingResponse {
+	t.Helper()
+	session, err := repo.GetClassSessionByID(context.Background(), demoSessionID)
+	if err != nil {
+		t.Fatalf("get session: %v", err)
+	}
+	bookingSvc := bookings.NewService(repo, nil, "")
+	resp, err := bookingSvc.Create(context.Background(), domain.CreateBookingRequest{
+		TenantSlug:     "studio-atelier",
+		CustomerName:   "Test User",
+		CustomerEmail:  email,
+		BookingMode:    "class",
+		ClassSessionID: &[]string{demoSessionID}[0],
+		StartsAt:       session.StartsAt.UTC().Format(time.RFC3339),
+		EndsAt:         session.EndsAt.UTC().Format(time.RFC3339),
+	})
+	if err != nil {
+		t.Fatalf("book class for %s: %v", email, err)
+	}
+	return resp
+}
+
+func TestCancelBookingLifecycle(t *testing.T) {
+	repo := db.NewMemoryRepository()
+	svc := newCatalogService(repo)
+	ctx := context.Background()
+
+	resp := bookClass(t, repo, "[email protected]")
+
+	if err := svc.CancelBooking(ctx, owner, resp.BookingID); err != nil {
+		t.Fatalf("cancel booking: %v", err)
+	}
+	booking, _ := repo.GetBookingByID(ctx, resp.BookingID)
+	if booking.Status != "cancelled" {
+		t.Fatalf("expected cancelled, got %q", booking.Status)
+	}
+
+	if err := svc.CancelBooking(ctx, owner, resp.BookingID); !errors.Is(err, ErrInvalidInput) {
+		t.Fatalf("expected ErrInvalidInput on second cancel, got %v", err)
+	}
+	if err := svc.CancelBooking(ctx, owner, "00000000-0000-0000-0000-000000000099"); !errors.Is(err, ErrBookingNotFound) {
+		t.Fatalf("expected ErrBookingNotFound, got %v", err)
+	}
+	stranger := domain.Principal{Subject: "someone-else", Role: "staff"}
+	if err := svc.CancelBooking(ctx, stranger, resp.BookingID); !errors.Is(err, ErrTenantMembership) {
+		t.Fatalf("expected ErrTenantMembership, got %v", err)
+	}
+}
+
+func TestCancelBookingPromotesWaitlist(t *testing.T) {
+	repo := db.NewMemoryRepository()
+	svc := newCatalogService(repo)
+	ctx := context.Background()
+
+	// Seeded session capacity is 4 — fill it, then overflow onto the waitlist.
+	var confirmed []domain.CreateBookingResponse
+	for i := 0; i < 4; i++ {
+		confirmed = append(confirmed, bookClass(t, repo, fmt.Sprintf("seat%[email protected]", i)))
+	}
+	first := bookClass(t, repo, "[email protected]")
+	second := bookClass(t, repo, "[email protected]")
+
+	booking, _ := repo.GetBookingByID(ctx, first.BookingID)
+	if booking.Status != "waitlisted" {
+		t.Fatalf("expected waitlisted, got %q", booking.Status)
+	}
+
+	// Cancel a confirmed seat -> earliest waiter is promoted, second stays queued.
+	if err := svc.CancelBooking(ctx, owner, confirmed[0].BookingID); err != nil {
+		t.Fatalf("cancel: %v", err)
+	}
+	booking, _ = repo.GetBookingByID(ctx, first.BookingID)
+	if booking.Status != "confirmed" {
+		t.Fatalf("expected first waiter promoted, got %q", booking.Status)
+	}
+	booking, _ = repo.GetBookingByID(ctx, second.BookingID)
+	if booking.Status != "waitlisted" {
+		t.Fatalf("expected second waiter still queued, got %q", booking.Status)
+	}
+
+	// Free another seat -> second waiter promoted.
+	if err := svc.CancelBooking(ctx, owner, confirmed[1].BookingID); err != nil {
+		t.Fatalf("cancel second: %v", err)
+	}
+	booking, _ = repo.GetBookingByID(ctx, second.BookingID)
+	if booking.Status != "confirmed" {
+		t.Fatalf("expected second waiter promoted, got %q", booking.Status)
+	}
+}

apps/backend/internal/db/bookings.go

@@ -9,7 +9,7 @@ func (r *PGRepository) ListBookingsByTenantBetween(ctx context.Context, tenantID
 	rows, err := r.pool.Query(ctx, `
 		SELECT id, tenant_id, service_id, class_session_id, staff_id, location_id,
 		       customer_name, customer_email, customer_phone, starts_at, ends_at, status, reference,
-		       COALESCE(manage_token, ''), COALESCE(notes, '')
+		       COALESCE(manage_token, ''), COALESCE(notes, ''), created_at
 		FROM bookings
 		WHERE tenant_id = $1 AND starts_at < $3 AND ends_at > $2
 		ORDER BY starts_at ASC
@@ -38,6 +38,7 @@ func (r *PGRepository) ListBookingsByTenantBetween(ctx context.Context, tenantID
 			&record.Reference,
 			&record.ManageToken,
 			&record.Notes,
+			&record.CreatedAt,
 		); err != nil {
 			return nil, err
 		}
@@ -84,6 +85,17 @@ func (r *PGRepository) AppendWaitlistEntry(ctx context.Context, params WaitlistE
 	return err
 }
 
+// ResolveWaitlistEntry marks the pending ledger row for a promoted booking.
+// Entries carry no booking_id, so the session + customer email pair is the
+// practical key.
+func (r *PGRepository) ResolveWaitlistEntry(ctx context.Context, tenantID, sessionID, customerEmail string) error {
+	_, err := r.pool.Exec(ctx, `
+		UPDATE waitlist_entries SET status = 'resolved'
+		WHERE tenant_id = $1 AND class_session_id = $2 AND customer_email = $3 AND status = 'pending'
+	`, tenantID, sessionID, customerEmail)
+	return err
+}
+
 func (r *PGRepository) CreateReminderJob(ctx context.Context, params ReminderJobParams) error {
 	_, err := r.pool.Exec(ctx, `
 		INSERT INTO reminder_jobs (tenant_id, booking_id, channel, scheduled_for)

apps/backend/internal/db/repository.go

@@ -36,6 +36,7 @@ type Repository interface {
 	ListBookingsByTenantBetween(ctx context.Context, tenantID string, from time.Time, to time.Time) ([]BookingRecord, error)
 	CreateBooking(ctx context.Context, params CreateBookingParams) (CreatedBooking, error)
 	AppendWaitlistEntry(ctx context.Context, params WaitlistEntryParams) error
+	ResolveWaitlistEntry(ctx context.Context, tenantID, sessionID, customerEmail string) error
 	CreateReminderJob(ctx context.Context, params ReminderJobParams) error
 	ListDueReminderJobs(ctx context.Context, dueBefore time.Time, limit int) ([]ReminderJobRecord, error)
 	MarkReminderJobDispatched(ctx context.Context, reminderJobID string, status string, dispatchedAt time.Time) error
@@ -103,6 +104,7 @@ type Repository interface {
 
 	// Customer Booking Management
 	GetBookingByReference(ctx context.Context, reference string) (BookingRecord, error)
+	GetBookingByID(ctx context.Context, bookingID string) (BookingRecord, error)
 	UpdateBookingStatus(ctx context.Context, bookingID string, status string) error
 	RescheduleBooking(ctx context.Context, bookingID string, startsAt time.Time, endsAt time.Time) error
 
@@ -352,6 +354,7 @@ type BookingRecord struct {
 	Reference      string
 	ManageToken    string
 	Notes          string
+	CreatedAt      time.Time
 }
 
 type CreateBookingParams struct {
@@ -719,11 +722,24 @@ func (r *PGRepository) GetBookingByReference(ctx context.Context, reference stri
 	err := r.pool.QueryRow(ctx, `
 		SELECT id, tenant_id, service_id, class_session_id, staff_id, location_id,
 		       customer_name, customer_email, customer_phone, starts_at, ends_at, status, reference,
-		       COALESCE(manage_token, ''), COALESCE(notes, '')
+		       COALESCE(manage_token, ''), COALESCE(notes, ''), created_at
 		FROM bookings
 		WHERE reference = $1
 	`, reference).Scan(&rec.ID, &rec.TenantID, &rec.ServiceID, &rec.ClassSessionID, &rec.StaffID, &rec.LocationID,
-		&rec.CustomerName, &rec.CustomerEmail, &rec.CustomerPhone, &rec.StartsAt, &rec.EndsAt, &rec.Status, &rec.Reference, &rec.ManageToken, &rec.Notes)
+		&rec.CustomerName, &rec.CustomerEmail, &rec.CustomerPhone, &rec.StartsAt, &rec.EndsAt, &rec.Status, &rec.Reference, &rec.ManageToken, &rec.Notes, &rec.CreatedAt)
+	return rec, err
+}
+
+func (r *PGRepository) GetBookingByID(ctx context.Context, bookingID string) (BookingRecord, error) {
+	var rec BookingRecord
+	err := r.pool.QueryRow(ctx, `
+		SELECT id, tenant_id, service_id, class_session_id, staff_id, location_id,
+		       customer_name, customer_email, customer_phone, starts_at, ends_at, status, reference,
+		       COALESCE(manage_token, ''), COALESCE(notes, ''), created_at
+		FROM bookings
+		WHERE id = $1
+	`, bookingID).Scan(&rec.ID, &rec.TenantID, &rec.ServiceID, &rec.ClassSessionID, &rec.StaffID, &rec.LocationID,
+		&rec.CustomerName, &rec.CustomerEmail, &rec.CustomerPhone, &rec.StartsAt, &rec.EndsAt, &rec.Status, &rec.Reference, &rec.ManageToken, &rec.Notes, &rec.CreatedAt)
 	return rec, err
 }
 
@@ -1343,6 +1359,7 @@ func (r *MemoryRepository) CreateBooking(_ context.Context, params CreateBooking
 		Reference:      params.Reference,
 		ManageToken:    params.ManageToken,
 		Notes:          params.Notes,
+		CreatedAt:      time.Now().UTC(),
 	})
 	return created, nil
 }
@@ -1352,6 +1369,13 @@ func (r *MemoryRepository) AppendWaitlistEntry(_ context.Context, _ WaitlistEntr
 	return nil
 }
 
+func (r *MemoryRepository) ResolveWaitlistEntry(_ context.Context, _, _, _ string) error {
+	if r.waitlistSize > 0 {
+		r.waitlistSize--
+	}
+	return nil
+}
+
 func (r *MemoryRepository) CreateReminderJob(_ context.Context, params ReminderJobParams) error {
 	reference := params.BookingID
 	startsAt := time.Now().UTC()
@@ -1756,6 +1780,15 @@ func (r *MemoryRepository) GetBookingByReference(_ context.Context, reference st
 	return BookingRecord{}, pgx.ErrNoRows
 }
 
+func (r *MemoryRepository) GetBookingByID(_ context.Context, bookingID string) (BookingRecord, error) {
+	for _, b := range r.bookings {
+		if b.ID == bookingID {
+			return b, nil
+		}
+	}
+	return BookingRecord{}, pgx.ErrNoRows
+}
+
 func (r *MemoryRepository) UpdateBookingStatus(_ context.Context, bookingID string, status string) error {
 	for i, b := range r.bookings {
 		if b.ID == bookingID {