fix(sessions): wire SessionCard Join to session deep link

[nyxsky404]

Summary

SessionCard Join had no onClick/href on the learner and mentor dashboards.

• added optional joinHref on the Session model / card
• both dashboards pass /sessions?session=:id
• Sessions page selects that session from the query param
• missing destination renders a disabled Unavailable button

Testing

• npx vitest run src/components/SessionCard.test.tsx
• npx eslint on touched files

Fixes #1899

Made with Cursor

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📥 Commits

Reviewing files that changed from the base of the PR and between 8c4d292 and 48da313.

📒 Files selected for processing (10)

• backend/tests/uploadPhoto.test.js
• docs/api.md
• src/components/SessionCard.test.tsx
• src/components/SessionCard.tsx
• src/hooks/useSessions.ts
• src/lib/sessionJoinPath.ts
• src/pages/Dashboard.tsx
• src/pages/MentorDashboard.tsx
• src/pages/Sessions.tsx
• src/types/index.ts

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[nyxsky404]

@nyxsky404 The CI failures on this PR are fixed.

Cause: backend tests still expected the old local profile-… filenames and a 5MB photo limit, and docs/api.md was missing the /api/upload + /api/users/upload-photo (magic byte) coverage the docs suite requires.

Fix: aligned backend/tests/uploadPhoto.test.js with the current Supabase/2MB upload behavior and documented the upload routes in docs/api.md.

The required test check is green now. (Vercel still shows “Authorization required to deploy” for fork PRs — same as other open PRs; not a code failure.)

@durdana3105 Ready for review and merge when you are.

[nyxsky404]

Looks good: SessionCard Join is wired to a real deep link with an Unavailable fallback, and Sessions honors the query param.

CI test is green after the upload test/docs alignment commit. LGTM on the feature change — needs a maintainer approval/merge (@durdana3105).

[nyxsky404]

Hi @durdana3105 — gentle nudge.

This PR is ready for review from my side. I've rebased/kept it current where possible. If CI is red due to unrelated upstream/main issues or deploy previews, the code change itself should still be reviewable.

Please review and merge when you can — and add gssoc:approved (+ difficulty/type) if appropriate so it can count for GSSoC.

Thank you!