bug: 'Apply for this mentor' deep link (?id=) is ignored by the mentee registration form

[yingliu-data]

Bug Report

The "Apply for this mentor" deep link passes ?id=<mentorId>, but the mentee registration wizard never reads it, so the selected mentor is lost.

• src/components/MentorProfileCard.tsx:131 — href={/mentorship/mentee-registration?id=${mentor.id}}.
• src/pages/mentorship/mentee-registration.tsx (whole component, ~lines 92-129) never reads router.query.

Reproduction

A mentee clicks "Apply" on a specific mentor's card → lands on a blank registration wizard with no mentor preselected at the application step → the intent of the deep link is lost.

Severity

Medium

Potential Risk

• Broken "apply to this mentor" flow; mentees must re-find and re-select the mentor manually (or don't).

Suggested Fix

• Read router.query.id in the registration page and preselect/prefill the corresponding mentor in the application step.
• Add a test navigating with ?id=<mentorId> and asserting the mentor is preselected.