feat: series-aware schedule edits + waitlist ledger removal (M32)

PATCH /v1/catalog/class-schedules/:id patches a recurring rule and,
with applyToFuture, retimes materialized future sessions to the new
local start time on their existing dates — moving confirmed and
waitlisted bookings with them and re-arming reminders. Zones-page
schedule rows gain an inline editor (CS/EN).

Also drops the vestigial waitlist_entries table (migration 00020):
positions derive from bookings.created_at, so the ledger was written
but never read.

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

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

apps/backend/internal/catalog/service.go

@@ -1387,17 +1387,10 @@ func (s *Service) CreateClassSchedule(ctx context.Context, principal domain.Prin
 	if req.DayOfWeek < 0 || req.DayOfWeek > 6 {
 		return domain.ClassSchedule{}, fmt.Errorf("%w: dayOfWeek must be 0-6", ErrInvalidInput)
 	}
-	startsLocal := strings.TrimSpace(req.StartsLocal)
-	parts := strings.SplitN(startsLocal, ":", 2)
-	if len(parts) != 2 {
-		return domain.ClassSchedule{}, fmt.Errorf("%w: startsLocal must be HH:MM", ErrInvalidInput)
+	startsLocal, err := normalizeScheduleLocalTime(req.StartsLocal)
+	if err != nil {
+		return domain.ClassSchedule{}, err
 	}
-	hour, errH := strconv.Atoi(parts[0])
-	minute, errM := strconv.Atoi(parts[1])
-	if errH != nil || errM != nil || hour < 0 || hour > 23 || minute < 0 || minute > 59 {
-		return domain.ClassSchedule{}, fmt.Errorf("%w: startsLocal must be HH:MM", ErrInvalidInput)
-	}
-	startsLocal = fmt.Sprintf("%02d:%02d:00", hour, minute)
 
 	if req.LocationID != nil {
 		location, err := s.repo.GetLocationByID(ctx, *req.LocationID)
@@ -1445,6 +1438,129 @@ func (s *Service) CreateClassSchedule(ctx context.Context, principal domain.Prin
 	return out, nil
 }
 
+// UpdateClassSchedule patches a recurring rule. When ApplyToFuture is set and
+// the time or location changed, already-materialized future sessions move to
+// the new start time (same local date) and location, their live bookings
+// follow, and confirmed bookings get reminders re-armed. A weekday change only
+// steers sessions materialized afterwards — existing dates are kept.
+func (s *Service) UpdateClassSchedule(ctx context.Context, principal domain.Principal, scheduleID string, req domain.UpdateClassScheduleRequest) (domain.ClassSchedule, error) {
+	membership, err := s.repo.GetTenantMembershipBySubject(ctx, principal.Subject)
+	if err != nil {
+		return domain.ClassSchedule{}, ErrTenantMembership
+	}
+	tenantID := membership.Tenant.ID
+
+	schedules, err := s.repo.ListClassSchedulesByTenant(ctx, tenantID)
+	if err != nil {
+		return domain.ClassSchedule{}, err
+	}
+	var current *db.ClassScheduleRecord
+	for i := range schedules {
+		if schedules[i].ID == scheduleID {
+			current = &schedules[i]
+			break
+		}
+	}
+	if current == nil {
+		return domain.ClassSchedule{}, ErrClassSessionNotFound
+	}
+
+	params := db.UpdateClassScheduleParams{
+		DayOfWeek:  req.DayOfWeek,
+		LocationID: req.LocationID,
+		Active:     req.Active,
+	}
+	if req.DayOfWeek != nil && (*req.DayOfWeek < 0 || *req.DayOfWeek > 6) {
+		return domain.ClassSchedule{}, fmt.Errorf("%w: dayOfWeek must be 0-6", ErrInvalidInput)
+	}
+	var startsLocal *string
+	if req.StartsLocal != nil {
+		normalized, err := normalizeScheduleLocalTime(*req.StartsLocal)
+		if err != nil {
+			return domain.ClassSchedule{}, err
+		}
+		startsLocal = &normalized
+		params.StartsLocal = startsLocal
+	}
+	if req.LocationID != nil && *req.LocationID != "" {
+		location, err := s.repo.GetLocationByID(ctx, *req.LocationID)
+		if err != nil {
+			if errors.Is(err, pgx.ErrNoRows) {
+				return domain.ClassSchedule{}, ErrLocationNotFound
+			}
+			return domain.ClassSchedule{}, err
+		}
+		if location.TenantID != tenantID {
+			return domain.ClassSchedule{}, ErrLocationNotFound
+		}
+	}
+
+	rec, err := s.repo.UpdateClassSchedule(ctx, tenantID, scheduleID, params)
+	if err != nil {
+		if strings.Contains(err.Error(), "not found") {
+			return domain.ClassSchedule{}, ErrClassSessionNotFound
+		}
+		return domain.ClassSchedule{}, err
+	}
+
+	if req.ApplyToFuture && (startsLocal != nil || req.LocationID != nil) {
+		now := time.Now().UTC()
+		if err := s.repo.RetimeFutureScheduleSessions(ctx, tenantID, scheduleID, startsLocal, req.LocationID, now); err != nil {
+			return domain.ClassSchedule{}, err
+		}
+		// Re-arm reminders for confirmed bookings on the moved sessions.
+		sessions, err := s.repo.ListClassSessionsBySchedule(ctx, tenantID, scheduleID, now)
+		if err != nil {
+			return domain.ClassSchedule{}, err
+		}
+		for _, session := range sessions {
+			sessionBookings, err := s.repo.ListBookingsBySession(ctx, session.ID)
+			if err != nil {
+				continue
+			}
+			for _, booking := range sessionBookings {
+				if booking.Status == "confirmed" {
+					bookings.RearmReminderJobs(ctx, s.repo, tenantID, booking)
+				}
+			}
+		}
+	}
+
+	template, _ := s.repo.GetClassTemplateByID(ctx, rec.TemplateID)
+	out := domain.ClassSchedule{
+		ID:            rec.ID,
+		TenantID:      rec.TenantID,
+		TemplateID:    rec.TemplateID,
+		TemplateTitle: template.Title,
+		LocationID:    rec.LocationID,
+		DayOfWeek:     rec.DayOfWeek,
+		StartsLocal:   rec.StartsLocal,
+		Active:        rec.Active,
+	}
+	if rec.LocationID != nil {
+		if location, err := s.repo.GetLocationByID(ctx, *rec.LocationID); err == nil {
+			out.LocationName = location.Name
+		}
+	}
+	return out, nil
+}
+
+// normalizeScheduleLocalTime validates "HH:MM" and returns the canonical
+// "HH:MM:SS" form the schedules table stores.
+func normalizeScheduleLocalTime(raw string) (string, error) {
+	trimmed := strings.TrimSpace(raw)
+	parts := strings.SplitN(trimmed, ":", 2)
+	if len(parts) != 2 {
+		return "", fmt.Errorf("%w: startsLocal must be HH:MM", ErrInvalidInput)
+	}
+	hour, errH := strconv.Atoi(parts[0])
+	minute, errM := strconv.Atoi(parts[1])
+	if errH != nil || errM != nil || hour < 0 || hour > 23 || minute < 0 || minute > 59 {
+		return "", fmt.Errorf("%w: startsLocal must be HH:MM", ErrInvalidInput)
+	}
+	return fmt.Sprintf("%02d:%02d:00", hour, minute), nil
+}
+
 // DeleteClassSchedule removes a recurring rule. Sessions already materialized
 // stay in place; no new ones are written.
 func (s *Service) DeleteClassSchedule(ctx context.Context, principal domain.Principal, scheduleID string) error {

apps/backend/internal/catalog/service_test.go

@@ -886,3 +886,110 @@ func TestCreateClassScheduleValidation(t *testing.T) {
 		t.Fatalf("expected ErrClassTemplateNotFound, got %v", err)
 	}
 }
+
+func TestUpdateClassScheduleRetimesFutureSessions(t *testing.T) {
+	repo := db.NewMemoryRepository()
+	svc := newCatalogService(repo)
+	ctx := context.Background()
+	tenantID := "5d6b3551-0a3e-4b86-bdf0-e9df20a47148"
+	templateID := "d13fe5fd-727f-4d69-bfd8-47f1b92a2cf7" // 60min mobility class
+
+	created, err := svc.CreateClassSchedule(ctx, owner, domain.CreateClassScheduleRequest{
+		TemplateID: templateID, DayOfWeek: 1, StartsLocal: "10:00",
+	})
+	if err != nil {
+		t.Fatalf("create schedule: %v", err)
+	}
+	sessions, err := repo.ListClassSessionsBySchedule(ctx, tenantID, created.ID, time.Now().UTC())
+	if err != nil || len(sessions) == 0 {
+		t.Fatalf("expected materialized sessions, got %d err=%v", len(sessions), err)
+	}
+	// Seed a confirmed booking on the first session.
+	target := sessions[0]
+	if _, err := repo.CreateBooking(ctx, db.CreateBookingParams{
+		TenantID:       tenantID,
+		ClassSessionID: &target.ID,
+		BookingMode:    "class",
+		CustomerName:   "Mover",
+		CustomerEmail:  "[email protected]",
+		StartsAt:       target.StartsAt,
+		EndsAt:         target.EndsAt,
+		Status:         "confirmed",
+		Reference:      "BK-MOVE-1",
+	}); err != nil {
+		t.Fatalf("seed booking: %v", err)
+	}
+	originalLocalHour := target.StartsAt.In(time.FixedZone("x", 0)).UTC().In(time.Local).Hour()
+	_ = originalLocalHour
+
+	newTime := "15:30"
+	updated, err := svc.UpdateClassSchedule(ctx, owner, created.ID, domain.UpdateClassScheduleRequest{
+		StartsLocal:   &newTime,
+		ApplyToFuture: true,
+	})
+	if err != nil {
+		t.Fatalf("update schedule: %v", err)
+	}
+	if updated.StartsLocal != "15:30:00" {
+		t.Fatalf("expected normalized 15:30:00, got %s", updated.StartsLocal)
+	}
+
+	loc, _ := time.LoadLocation("Europe/Prague")
+	moved, err := repo.ListClassSessionsBySchedule(ctx, tenantID, created.ID, time.Now().UTC())
+	if err != nil || len(moved) == 0 {
+		t.Fatalf("expected moved sessions, got %d err=%v", len(moved), err)
+	}
+	for _, session := range moved {
+		local := session.StartsAt.In(loc)
+		if local.Hour() != 15 || local.Minute() != 30 {
+			t.Fatalf("session not retimed: %v local=%v", session.StartsAt, local)
+		}
+		if session.EndsAt.Sub(session.StartsAt) != 60*time.Minute {
+			t.Fatalf("expected 60min duration preserved, got %v", session.EndsAt.Sub(session.StartsAt))
+		}
+		// Same local date as before — only the time-of-day moved.
+		if local.Weekday() != time.Monday {
+			t.Fatalf("session changed weekday: %v", local.Weekday())
+		}
+	}
+
+	// The seeded booking must follow its session's new window.
+	booking, err := repo.GetBookingByReference(ctx, "BK-MOVE-1")
+	if err != nil {
+		t.Fatalf("fetch booking: %v", err)
+	}
+	if !booking.StartsAt.Equal(moved[0].StartsAt) || !booking.EndsAt.Equal(moved[0].EndsAt) {
+		t.Fatalf("booking not synced: %v–%v vs session %v–%v", booking.StartsAt, booking.EndsAt, moved[0].StartsAt, moved[0].EndsAt)
+	}
+}
+
+func TestUpdateClassScheduleWithoutCascade(t *testing.T) {
+	repo := db.NewMemoryRepository()
+	svc := newCatalogService(repo)
+	ctx := context.Background()
+	tenantID := "5d6b3551-0a3e-4b86-bdf0-e9df20a47148"
+
+	created, err := svc.CreateClassSchedule(ctx, owner, domain.CreateClassScheduleRequest{
+		TemplateID: "d13fe5fd-727f-4d69-bfd8-47f1b92a2cf7", DayOfWeek: 1, StartsLocal: "10:00",
+	})
+	if err != nil {
+		t.Fatalf("create schedule: %v", err)
+	}
+	before, _ := repo.ListClassSessionsBySchedule(ctx, tenantID, created.ID, time.Now().UTC())
+
+	newTime := "16:00"
+	if _, err := svc.UpdateClassSchedule(ctx, owner, created.ID, domain.UpdateClassScheduleRequest{
+		StartsLocal: &newTime,
+	}); err != nil {
+		t.Fatalf("update without cascade: %v", err)
+	}
+	after, _ := repo.ListClassSessionsBySchedule(ctx, tenantID, created.ID, time.Now().UTC())
+	if len(after) != len(before) {
+		t.Fatalf("session count changed without cascade: %d -> %d", len(before), len(after))
+	}
+	for i := range after {
+		if !after[i].StartsAt.Equal(before[i].StartsAt) {
+			t.Fatal("session moved without applyToFuture")
+		}
+	}
+}