[PHASE 9] Implement admin security features and compliance controls

[dannycab]

Phase 9: Admin Security Features and Compliance Controls

✅ COMPLETED: Content Moderation & Profanity Filtering

Bugs Fixed:

1. Profane messages visible to students - Profane questions now properly flagged and hidden from student view until instructor approval
2. Flagged questions not loading on page load - "Flagged for Review" tab now shows correct count on initial page load
3. Flagged questions not appearing in instructor tab - Flagged questions now properly loaded and displayed in separate "Flagged for Review" tab
4. Approve button disabled for profanity - Fixed: Instructors can now approve profane questions (showing censored version to students)
5. Disabled button styling missing - Added CSS styling for disabled buttons so they appear grayed out
6. Tab selection reset on refresh - Fixed: Active tab preference now persists across page refreshes using localStorage

Implementation Details:

• Backend (routes_classes.py): Flagged/rejected questions filtered from main endpoint, only shown in dedicated flagged-questions endpoint
• Frontend (student.js): WebSocket messages filtered by status; only approved questions displayed to students
• Frontend (instructor.js): Flagged questions loaded on init; tab preference saved/restored; all moderation buttons (approve/reject/delete) functional
• Styling (styles.css): Added comprehensive :disabled pseudo-class styling for all button types

Features Working:

• ✅ Questions flagged for profanity on submission
• ✅ Original text hidden, censored version stored
• ✅ Students see censored version if approved
• ✅ Students see nothing if rejected
• ✅ Instructors can approve → shows censored to students
• ✅ Instructors can reject → hides from students
• ✅ Instructors can unflag rejected questions → restore to flagged
• ✅ Delete button functional
• ✅ Flagged count persists across refreshes
• ✅ Tab selection persists across refreshes

Test Results:

• ✅ All automated profanity detection tests passing
• ✅ All manual workflow tests passing
• ✅ Verified with curl API testing

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⏳ REMAINING WORK FOR PHASE 9:

1. Access Controls (Not Started)

• Multi-level admin roles (super-admin, admin, moderator) - PARTIAL: RBAC system exists, needs expansion
• Permission-based feature access
• IP whitelisting for admin panel

2. Account Security (Not Started)

• Force password change for instructors (8-10 hrs)
• Password expiration policies (6-8 hrs)
• Two-factor authentication (2FA) for admin accounts (8-10 hrs)
• Session timeout enforcement (5-6 hrs)
• Brute force protection/account lockout (4-5 hrs)

3. Data Privacy (Not Started)

• GDPR/FERPA compliance considerations (3-4 hrs)
• Data export functionality for instructors (6-8 hrs)
• Account deletion with data retention policies (4-6 hrs)
• Audit trail for data access (4-6 hrs)

4. Rate Limiting & DDoS Protection (Partial)

• Per-user rate limits on API endpoints - BASIC: SlowAPI implemented
• Admin panel rate limiting (2-3 hrs)
• Login attempt limiting/brute force protection (4-5 hrs)

5. Security Monitoring (Not Started)

• Failed login attempt tracking (3-4 hrs)
• Suspicious activity alerts (4-5 hrs)
• API key compromise detection (3-4 hrs)
• Security event logging (8-10 hrs)
• Audit trail system (8-10 hrs)

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Summary:

• Content Moderation: COMPLETE ✅
• Overall Phase 9 Completion: ~20-25% (content moderation complete, security hardening still needed)
• Estimated Remaining Work: 65-85 hours

Files Modified:

• routes_classes.py
• static/js/student.js
• static/js/instructor.js
• static/css/styles.css
• test_profanity_fix.py (new)

Related Commit:

9b21af8 - "Fix profanity filtering and instructor UI issues"