#443 Video Conferencing: Fraud Detection

[Timrossid]

Closes #443

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Implements comprehensive Fraud Detection for Video Conferencing to address issue #443.

New Files

• *\src/services/fraud-detection/types.ts* - Type definitions
• *\src/services/fraud-detection/index.ts* - Core FraudDetectionService with detection for: rapid join/leave, multiple connections, screen share abuse, meeting bombing, action abuse, suspicious identity detection, and conference access control
• *\src/hooks/useFraudDetection.ts* - React hook for component integration
• *\src/services/fraud-detection/tests/FraudDetectionService.test.ts* - 27 unit tests

Modified Files

• *\VideoConference.tsx* - Fraud score badge, warning alerts, blocked state, action checks
• *\LeaderboardConference.tsx* - Access control, host tracking, locked conferences, error alerts
• *\useCollaboration.ts* - Added \isHost\ field

Testing

• All 27 new fraud detection tests pass
• All 19 existing LeaderboardConference tests pass (no regression)

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[RUKAYAT-CODER]

Kindly resolve conflict and fix workflow.