#105 Security: Admin Panel Security Audit

Perform comprehensive security audit of Admin Panel. Security Checklist: 1. Authentication: - JWT validation on all endpoints - Token expiration enforced - Refresh token handling secure - Session invalidation works 2. Authorization: - RBAC enforced on all endpoints - Permission checks server-side - No privilege escalation possible - Role hierarchy respected 3. Input Validation: - All inputs sanitized - SQL injection prevention - XSS prevention - CSRF protection 4. Rate Limiting: - Login attempts limited - API calls rate limited - Token generation limited 5. Audit: - All admin actions logged - Logs immutable - Sensitive data masked in logs 6. Data Protection: - Passwords hashed (bcrypt) - API keys hashed (SHA256) - Tokens not stored in plaintext - PII encryption at rest 7. Error Handling: - No stack traces exposed - Generic error messages to client - Detailed errors only in logs Document findings and remediation steps. With ultra attention to details and correctness. Before closing: write comment summarizing implementation with screenshot.