Fix phone formatting

backend/src/main/java/com/petshop/backend/entity/StoreLocation.java

@@ -1,5 +1,6 @@
 package com.petshop.backend.entity;
 
+import com.petshop.backend.util.PhoneUtils;
 import jakarta.persistence.*;
 import org.hibernate.annotations.CreationTimestamp;
 import org.hibernate.annotations.UpdateTimestamp;
@@ -77,7 +78,7 @@ public class StoreLocation {
     }
 
     public void setPhone(String phone) {
-        this.phone = phone;
+        this.phone = PhoneUtils.normalize(phone);
     }
 
     public String getEmail() {

backend/src/main/java/com/petshop/backend/entity/Supplier.java

@@ -1,5 +1,6 @@
 package com.petshop.backend.entity;
 
+import com.petshop.backend.util.PhoneUtils;
 import jakarta.persistence.*;
 import org.hibernate.annotations.CreationTimestamp;
 import org.hibernate.annotations.UpdateTimestamp;
@@ -97,7 +98,7 @@ public class Supplier {
     }
 
     public void setSupPhone(String supPhone) {
-        this.supPhone = supPhone;
+        this.supPhone = PhoneUtils.normalize(supPhone);
     }
 
     public LocalDateTime getCreatedAt() {

backend/src/main/java/com/petshop/backend/entity/User.java

@@ -1,5 +1,6 @@
 package com.petshop.backend.entity;
 
+import com.petshop.backend.util.PhoneUtils;
 import jakarta.persistence.*;
 import org.hibernate.annotations.CreationTimestamp;
 import org.hibernate.annotations.UpdateTimestamp;
@@ -118,7 +119,7 @@ public class User {
     }
 
     public void setPhone(String phone) {
-        this.phone = phone;
+        this.phone = PhoneUtils.normalize(phone);
     }
 
     public String getAvatarUrl() {

backend/src/main/java/com/petshop/backend/util/PhoneUtils.java

@@ -0,0 +1,24 @@
+package com.petshop.backend.util;
+
+public class PhoneUtils {
+    public static String normalize(String phone) {
+        if (phone == null) {
+            return null;
+        }
+        
+        String digits = phone.replaceAll("\\D", "");
+        
+        if (digits.length() >= 10) {
+            if (digits.length() == 11 && digits.startsWith("1")) {
+                digits = digits.substring(1);
+            }
+            digits = digits.substring(0, 10);
+            return String.format("(%s) %s-%s", 
+                    digits.substring(0, 3), 
+                    digits.substring(3, 6), 
+                    digits.substring(6));
+        }
+        
+        return phone;
+    }
+}

backend/src/main/resources/db/migration/V14__normalize_phone_numbers.sql

@@ -0,0 +1,34 @@
+-- Normalize existing phone numbers to (XXX) XXX-XXXX format
+
+-- Update users table
+UPDATE users
+SET phone = '(' || SUBSTRING(clean_digits, 1, 3) || ') ' || SUBSTRING(clean_digits, 4, 3) || '-' || SUBSTRING(clean_digits, 7, 4)
+FROM (
+    SELECT id, 
+           RIGHT(regexp_replace(phone, '\D', '', 'g'), 10) as clean_digits
+    FROM users
+    WHERE regexp_replace(phone, '\D', '', 'g') ~ '\d{10,}$'
+) AS sub
+WHERE users.id = sub.id;
+
+-- Update supplier table
+UPDATE supplier
+SET supPhone = '(' || SUBSTRING(clean_digits, 1, 3) || ') ' || SUBSTRING(clean_digits, 4, 3) || '-' || SUBSTRING(clean_digits, 7, 4)
+FROM (
+    SELECT supId, 
+           RIGHT(regexp_replace(supPhone, '\D', '', 'g'), 10) as clean_digits
+    FROM supplier
+    WHERE regexp_replace(supPhone, '\D', '', 'g') ~ '\d{10,}$'
+) AS sub
+WHERE supplier.supId = sub.supId;
+
+-- Update storeLocation table
+UPDATE storeLocation
+SET phone = '(' || SUBSTRING(clean_digits, 1, 3) || ') ' || SUBSTRING(clean_digits, 4, 3) || '-' || SUBSTRING(clean_digits, 7, 4)
+FROM (
+    SELECT storeId, 
+           RIGHT(regexp_replace(phone, '\D', '', 'g'), 10) as clean_digits
+    FROM storeLocation
+    WHERE regexp_replace(phone, '\D', '', 'g') ~ '\d{10,}$'
+) AS sub
+WHERE storeLocation.storeId = sub.storeId;