Test Assignment by Teacher with Due Date

[ankit2101]

Summary

Allow admin to assign a specific chapter test to one or more students with a due date. Students see assigned tests highlighted on their home screen. Admin tracks completion status and scores.

Why

Currently all test-taking is self-initiated. Teachers need to assign homework and verify completion — this is how EdTech tools get integrated into the school week rather than remaining optional extras. Transforms ChapterWise from a practice tool into a classwork tool.

Implementation Notes

• New Assignment model: (id, chapter_id, student_ids, due_date, created_by, created_at)
• New endpoints: POST /api/admin/assignments, GET /api/admin/assignments, GET /api/student/assignments
• Student home screen shows 'Assigned Tests' section with due dates
• Admin can see completion status: Not Started / In Progress / Completed per student

Acceptance Criteria

• Admin can assign a chapter to one or multiple students with a due date
• Students see assigned tests highlighted on home screen
• Admin dashboard shows completion status per assignment
• Overdue assignments flagged in red