#87 UI: Security Settings Page

Create Security Settings configuration page. Component: api/ui/templates/components/admin_security/ Files: - admin_security.html - admin_security.css - admin_security.js URL: #/admin/settings/security Sections: 1. IP Whitelist Management: - Current whitelist table - Add IP/CIDR input with validation - Description field - Expiration date picker (optional) - Remove button per entry - Warning if current IP not in whitelist 2. Rate Limiting: - Current limits display - Edit form for each limit type - Usage meters showing current usage vs limit - Reset button for counters 3. Session Settings: - Session timeout slider - Max concurrent sessions - Remember me duration - Force re-auth for sensitive actions 4. Authentication Settings: - Google OAuth toggle - Password requirements display - MFA enforcement toggle - Allowed email domains 5. Security Alerts: - Failed login threshold - Suspicious activity notifications - Email notification recipients With ultra attention to details and correctness. Before closing: write comment summarizing implementation with screenshot.