feat: disable mentor apply button when registration is closed (#299)

[IrynaLypnyk]

Description

Disabled the “Apply for this mentor” action on mentor cards when mentorship registration is closed.

This change:

• adds disabled state support to the shared LinkButton component;
• uses the existing IS_REGISTRATION_OPEN flag to control the Apply action on MentorProfileCard;
• renders the Apply action as a disabled button when registration is closed, instead of an active link.

This prevents users from trying to apply for mentors when registration is not currently available.

Type

• Bug Fix
• New Feature
• Code Refactor
• Documentation
• Other

Related Issue

Closes #299

Screenshots

Added screenshots showing the Mentors page with the “Apply for this mentor” button disabled when registration is closed.

BEFORE:

AFTER:

Testing

• Verified locally with the existing Mentor Filter API.
• Confirmed that the local database contains a June AD_HOC mentorship cycle and mentors with June availability.
• Updated the local June AD_HOC cycle status to open for testing.
• Verified that mentors with availability are returned by /api/cms/v1/mentorship/mentors and displayed on the Mentors page.
• Verified that the “Apply for this mentor” button is disabled when IS_REGISTRATION_OPEN is false.
• Verified that the Apply action is rendered as a link when IS_REGISTRATION_OPEN is true.
• Updated MentorProfileCard component tests to cover both open and closed registration states.

Pull request checklist

Please check if your PR fulfills the following requirements:

• I checked and followed the contributor guide
• I have tested my changes locally.
• I have added a screenshot from the website after I tested it locally

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud