v4.9.50

Asteria Client v4.9.50

Fixes

• Sidebar: version is a bottom badge (logo lockup no longer crowded).
• Sidebar brand uses official logo_light.png lockup; sidebar sticks to viewport.
• Load ransomware_quarantine.json with utf-8-sig (PowerShell BOM safe).
• Lifecycle startup event reports real process mode instead of unknown.