Implement contact form components

[eunicode]

Dependency

• Create Contact Us Page #1844

Overview

Part of parent issue #1213

This issue covers building the form components and UX behavior (inputs, validation, error states, success message). Email integration will be handled separately.

Action Items

• Add form fields based on Figma design (e.g., Name, Email, Message)
• Implement client-side validation (required fields, valid email)
• Add error and success states (inline + banner)
• Show loading state on submit button
• Ensure accessibility (labels, aria attributes)

Acceptance Criteria

• Users can fill out form fields
• Form prevents submission until all required fields are valid
• Error messages appear for invalid input
• Success state appears after mock submission (API integration later)

IF BLOCKING ANOTHER ISSUE:

• remove dependency on Contact page - email service integration #1842 and move it to New Issues waiting for approval on the project board

Resources/Notes

• Design: Figma link