fix: add 60% coverage minimum to CI, scope prettier to staged frontend files

backend/handlers/payments/giftcards.go

@@ -1086,7 +1086,7 @@ func BuyGiftCard(w http.ResponseWriter, r *http.Request) {
 			recipient = userEmail
 		}
 		// Notify admin about the friend gift card (email delivery not yet implemented — admin must send manually)
-		if _, err := tx.Exec(ctx, `
+		if _, err := db.Conn.Exec(context.Background(), `
 			INSERT INTO admin_notifications (reason, booking_id, user_id)
 			VALUES ('gift_card_purchased_for_friend', NULL, $1)
 		`, userID); err != nil {

backend/handlers/payments/till_test.go

@@ -20,6 +20,7 @@ import (
 
 	"github.com/go-chi/chi/v5"
 	"github.com/jackc/pgx/v5"
+	"github.com/stretchr/testify/require"
 )
 
 func TestCreateTillSale_OnTheHouse(t *testing.T) {
@@ -541,17 +542,10 @@ func TestGetTillCheckoutStatus_Completed(t *testing.T) {
 	}
 
 	// Wait for the mock goroutine to complete the checkout with polling.
-	deadline := time.Now().Add(5 * time.Second)
-	for {
+	require.Eventually(t, func() bool {
 		_, err := SquareClient.GetCheckout(context.Background(), *createResp.CheckoutID)
-		if err == nil {
-			break
-		}
-		if time.Now().After(deadline) {
-			t.Fatalf("timed out waiting for checkout to complete: %v", err)
-		}
-		time.Sleep(100 * time.Millisecond)
-	}
+		return err == nil
+	}, 5*time.Second, 100*time.Millisecond)
 
 	// Now call GetTillCheckoutStatus — should return COMPLETED.
 	statusReq := httptest.NewRequest("GET", "/api/admin/till/checkout/"+*createResp.CheckoutID+"/status", nil)