feat: add ACME account management with validation pipeline

- Register, view, and deactivate ACME accounts via API and UI
- 16-check validation framework for certificate issuance readiness
- DNS resolution, port, nginx, and firewall pre-flight checks
- External IP detection with NAT support and fallback providers
- Account card and settings modal in certificates page
- Guard certificate issuance behind account registration
- Update modal CSS to overlay-based approach
- 1000+ lines of tests for validation and account handlers

restart-services.sh

@@ -1,9 +1,12 @@
 #!/bin/bash
 
+echo "systemctl restart nginx"
 systemctl restart nginx
 sleep 1
+echo "systemctl restart vacuum-walld"
 systemctl restart vacuum-walld
 sleep 1
+echo "systemctl restart vacuum-wall"
 systemctl restart vacuum-wall
 
 # Verify services are running