💡 [FEATURE] - Implement unit tests in test/validate-form-simple.test.js

[isonnymichael]

Summary

We need to ensure the core functionality of validateForm works as expected across multiple scenarios. This issue aims to write meaningful unit tests using Jest and jsdom.

Basic Example

Enhance the test coverage in test/validate-form-simple.test.js to cover:

• Shows error messages when required fields are empty
• Submits form if all inputs are valid
• Fails on invalid email
• Fails on invalid phone number
• Correct number of error messages
• Accepts input values and reflects them correctly
• Honors mocked form.submit behavior

Additional context

No response