Add homework submission editing with enrollment quick access and clear buttons

[Copilot]

Adds ability to edit homework submission answers and learning in public links. Mirrors existing project submission edit functionality. Includes quick access from enrollment pages and one-click clear buttons for learning in public data.

Changes

Backend

• New homework_submission_edit view at /cadmin/<course>/<homework>/submissions/<id>/edit
• Handles answer updates across all question types (free form, multiple choice, checkboxes)
• Reuses existing update_score() to recalculate questions/FAQ/learning-in-public scores
• Triggers update_leaderboard() only when total score changes
• Updated enrollment_edit view to display homework and project submissions with edit links

Frontend

• Edit form displays all questions with current answers, correct answers for reference, and answer status badges
• Learning in public links editable as comma-separated values
• Edit button added to submissions list
• NEW: Enrollment edit page shows all homework and project submissions with direct edit links
• NEW: "Remove Learning in Public Links" button on homework edit page (clears field without global disable)
• NEW: "Remove Learning in Public Score" buttons on project edit page (zeros scores without global disable)

Tests

• 3 new tests covering form display, score recalculation, and leaderboard updates

Screenshots

Submissions List

Edit Form with Clear Button

After Clearing Learning in Public Links

Enrollment Edit with Submission Quick Access

From the enrollment/leaderboard management page, staff can now view and edit all homework and project submissions for a student in one place.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Edit submission scores for homework</issue_title>
<issue_description>Just like we have submission edit functionality for projects, let's do the same for homework submissions

I want to edit correct answers and also learning in public links. That should trigger leaderboard recalculation if the score changes </issue_description>

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

• Fixes Edit submission scores for homework #151

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[alexeygrigorev]

@copilot for cadmin link from the leaderboard record: I want to use that page to edit both homework and project submissions

[Copilot]

@copilot for cadmin link from the leaderboard record: I want to use that page to edit both homework and project submissions

Added in commit 3a00a3d. The enrollment edit page now shows tables with all homework and project submissions for the student, each with an Edit link to quickly jump to submission editing.

Screenshots:

• Enrollment page with submission lists: https://github.com/user-attachments/assets/027322dc-b395-459c-b4a4-972a3753f027
• Edit form: https://github.com/user-attachments/assets/1593d0c4-4f4c-4f6f-887a-3a8a47597235