feat(tests): test coverage is 70.5

test/core/constants/app_constants_test.dart

@@ -125,6 +125,34 @@ void main() {
         expect(AppConstants.commentsEndpoint, '/comments');
       });
     });
+
+    group('Regex validation', () {
+      test('email regex validates correct emails', () {
+        final regex = RegExp(AppConstants.emailRegex);
+        expect(regex.hasMatch('test@example.com'), isTrue);
+        expect(regex.hasMatch('user.name@domain.co.uk'), isTrue);
+        expect(regex.hasMatch('invalid-email'), isFalse);
+        expect(regex.hasMatch('@example.com'), isFalse);
+      });
+
+      test('phone regex validates correct phones', () {
+        final regex = RegExp(AppConstants.phoneRegex);
+        expect(regex.hasMatch('+1234567890'), isTrue);
+        expect(regex.hasMatch('1234567890'), isTrue);
+        expect(regex.hasMatch('+123'), isTrue);
+        expect(regex.hasMatch('invalid'), isFalse);
+        expect(regex.hasMatch('+0123456789'), isFalse);
+      });
+
+      test('url regex validates correct URLs', () {
+        final regex = RegExp(AppConstants.urlRegex);
+        expect(regex.hasMatch('https://example.com'), isTrue);
+        expect(regex.hasMatch('http://www.example.com'), isTrue);
+        expect(regex.hasMatch('https://example.com/path?query=value'), isTrue);
+        expect(regex.hasMatch('invalid-url'), isFalse);
+        expect(regex.hasMatch('ftp://example.com'), isFalse);
+      });
+    });
   });
 }