fix: remove redundant rollback, document asymmetry in cancellation notifications

backend/handlers/bookings/bookings.go

@@ -3173,11 +3173,13 @@ func ConfirmBookingHandler(w http.ResponseWriter, r *http.Request) {
 			log.Printf("ALERT: failed to scan total_duration_minutes for booking %s: %v", bookingID, err)
 			durationMinutes = 60
 		}
-		_ = dav.Service.CreateEvent(1, dav.EventInput{
+		if err := dav.Service.CreateEvent(1, dav.EventInput{
 			Summary: "Crussell Booking",
 			Start:   booking.StartTime,
 			End:     booking.StartTime.Add(time.Duration(durationMinutes) * time.Minute),
-		})
+		}); err != nil {
+			log.Printf("Failed to create DAV calendar event for booking %s: %v", bookingID, err)
+		}
 	}
 
 	w.Header().Set("Content-Type", "application/json")

backend/handlers/bookings/manage.go

@@ -232,6 +232,9 @@ func AdminCancelBookingHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// No admin notification needed for pending/admin-initiated cancellations —
+	// the admin is the one performing the cancellation, so notifying them would
+	// be self-referential.
 	// Only notify on cancellation if booking was not pending (e.g. confirmed, in_progress)
 	if originalStatus != "pending" {
 		notificationQuery := `

backend/handlers/payments/handlers.go

@@ -1802,7 +1802,6 @@ func CreateTipPayment(w http.ResponseWriter, r *http.Request) {
 
 	paymentID, err := service.CreatePaymentRecordTx(r.Context(), tx, record, nil)
 	if err != nil {
-		_ = tx.Rollback(r.Context())
 		log.Printf("Failed to create payment record: %v", err)
 		http.Error(w, "internal server error", http.StatusInternalServerError)
 		return

backend/handlers/payments/payments_test.go

@@ -1019,11 +1019,6 @@ func TestCreateBookingPayment_MultiplePartialAllowed(t *testing.T) {
 	}
 }
 
-func TestSquareWebhook_DevMode_NoSignature(t *testing.T) {
-	t.Parallel()
-	t.Skip("webhook handler tested in webhooks package")
-}
-
 // ============================================================
 // User Booking Payment Tests — deposit, full, partial, balance
 // ============================================================

backend/handlers/today/today.go

@@ -322,7 +322,7 @@ func computeAggregateSummary(r *http.Request, rangeStart, rangeEnd time.Time) *D
 		) sub ON true
 		WHERE b.start_time >= $1 AND b.start_time < $2
 	`
-	_ = db.Conn.QueryRow(r.Context(), query, rangeStart, rangeEnd).Scan(
+	if err := db.Conn.QueryRow(r.Context(), query, rangeStart, rangeEnd).Scan(
 		&summary.TotalPaymentsToday,
 		&summary.TotalTipsToday,
 		&summary.TotalVATCollected,
@@ -335,7 +335,9 @@ func computeAggregateSummary(r *http.Request, rangeStart, rangeEnd time.Time) *D
 		&summary.LastCustomerName,
 		&summary.LastCustomerVisits,
 		&summary.GuestCustomers,
-	)
+	); err != nil {
+		log.Printf("Failed to scan today summary: %v", err)
+	}
 
 	// Customers served = new + returning + guest (distinct people, not bookings)
 	summary.CustomersServed = summary.NewCustomers + summary.ReturningCustomers + summary.GuestCustomers

backend/handlers/user/user_coverage_test.go

@@ -563,10 +563,8 @@ func TestDeleteAccount_WithProfilePicture(t *testing.T) {
 
 	// Handler returns 204 regardless of goroutine result
 	assert.Equal(t, http.StatusNoContent, w.Code)
-	// Allow goroutines to start before test cleanup
-	assert.Eventually(t, func() bool {
-		return true
-	}, 100*time.Millisecond, 10*time.Millisecond)
+	// Best-effort wait for background goroutine to initiate
+	time.Sleep(50 * time.Millisecond)
 }
 
 // =============================================================================
@@ -592,7 +590,7 @@ func TestDeleteAccount_WithSquareClient(t *testing.T) {
 	handler.ServeHTTP(w, req)
 
 	assert.Equal(t, http.StatusNoContent, w.Code)
-	assert.Eventually(t, func() bool {
-		return true
-	}, 100*time.Millisecond, 10*time.Millisecond)
+	// Best-effort wait for background goroutine to initiate
+	time.Sleep(50 * time.Millisecond)
 }
+