Enhance cadmin with link styling, Django admin shortcuts, and project submission editing

[Copilot]

Updates the course admin panel (cadmin) with improved navigation and editing capabilities. Makes the admin link consistent with other admin-only links, adds quick access to Django admin, and enables editing project submission scores after evaluation.

Changes

Link styling

• Changed cadmin link from button to plain link on separate line in courses/course.html
• Now matches homework/project admin link style: <i class="fas fa-cog"></i> Manage course (Admin only)

Django admin shortcuts

Added edit links in cadmin/course_admin.html:

• Course-level: Direct link to edit course in Django admin
• Homework/Project tables: Edit icon next to each title linking to Django admin

<a href="/admin/courses/homework/{{ hw.id }}/change/" title="Edit in Django Admin">
  <i class="fas fa-edit"></i>
</a>

Project submission editing

New edit functionality within cadmin (not Django admin):

• Edit button in project submissions table
• New route: cadmin/<course>/<project>/submissions/<id>/edit
• Editable fields: all score components, total score, reviewed_enough_peers, passed
• Available even after evaluation phase completes

@staff_required
def project_submission_edit(request, course_slug, project_slug, submission_id):
    # Updates project_score, peer_review_score, total_score, passed, etc.
    # With validation and user feedback

Test structure

Restructured cadmin/tests.py → cadmin/tests/ folder to match courses/tests/ and data/tests/ patterns. Updated pyproject.toml testpaths accordingly.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>New features for cadmin</issue_title>
<issue_description>We recently added the course admin panel

Please do this:

• inside courses (the view for everyone) make the link to cadmin a link, not a button. Just like in homework/project submission forms
• add links to the Django admin panel for course, homework, project
• make it possible to edit project submission results after the evaluation phase </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes New features for cadmin #132

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.