fix api build issues

apps/api/src/shared/testing/contractValidation.test.ts

@@ -241,12 +241,15 @@ describe('API Contract Validation', () => {
           const dtoContent = await fs.readFile(dtoPath, 'utf-8');
 
           if (propSchema.nullable) {
-            // Nullable properties should be optional in TypeScript
-            const propRegex = new RegExp(`${propName}\\??:\\s*([\\w\\[\\]<>|]+)\\s*;`);
+            // Nullable properties should be optional OR include `| null` in the type.
+            const propRegex = new RegExp(`${propName}(\\?)?:\\s*([^;]+);`);
             const match = dtoContent.match(propRegex);
+
             if (match) {
-              // Should include null in the type or be optional
-              expect(match[1]).toContain('| null');
+              const optionalMark = match[1];
+              const typeText = match[2] ?? '';
+
+              expect(optionalMark === '?' || typeText.includes('| null')).toBe(true);
             }
           }
         }