Fix PSF membership link (#2787) with dynamic logic

[czc0407]

Summary

Fixes #2766 — Clicking the PSF membership link previously led to /users/membership/edit/, causing a 404 for unauthenticated users. This PR updates the link rendering logic and adds tests.

Changes

• Updated templates/includes/authenticated.html to dynamically choose:
  • /users/membership/ for non-members
  • /users/membership/edit/ for existing members
• Added new test file: users/tests/test_membership_links.py

Testing

Run:

python3 manage.py test users.tests.test_membership_links

All tests passed ✅

Impact

This fix ensures the membership link works for both logged-in and anonymous users.