Add validation to the review section.

[Ruhiidrisi786]

🔍 Validation Issues Identified

The form allows submission without enforcing proper input validation, resulting in invalid data being accepted.

• Mobile Number Field
  - Accepts numeric input without validating the required 10-digit length.
  - Incorrect or incomplete numbers can be submitted.

• Email Address Field
  - Invalid or incomplete email formats are accepted.
  - Proper email pattern validation (@ symbol and domain) is missing.

• Name Field
  - Random or meaningless text input is allowed.
  - No minimum character length or alphabet-only validation is applied.

• Message Field
  - Allows submission with very short or irrelevant messages.
  - Required-field validation is not enforced.

• User Experience Issues
  - No inline error messages are displayed for incorrect inputs.
  - Users receive a success alert even when the data is invalid.

• Security & Data Quality Risks
  - Lack of validation may result in spam submissions and poor-quality data storage.

[Ruhiidrisi786]

What can I do with this pull request?

• Added proper client-side and server-side validation to the feedback form.
• Prevents submission of invalid or incomplete data.
• Displays clear error messages for better user experience.

Issue Fixed

• Missing form validation allowing invalid submissions.