Cleanup the fal2ban restart trigger functions, and improove error handling

internal/locales/en.json

@@ -5,6 +5,8 @@
     "nav.settings": "Settings",
     "restart_banner.message": "Fail2ban configuration changed. To apply the changes, please ",
     "restart_banner.button": "Restart Service",
+    "restart_banner.restart_success": "Fail2ban service restarted and passed health check",
+    "restart_banner.reload_success": "Fail2ban configuration reloaded successfully (no systemd service restart)",
     "dashboard.title": "Dashboard",
     "dashboard.overview": "Overview active Jails and Blocks",
     "dashboard.overview_hint": "Use the search to filter banned IPs and click a jail to edit its configuration.",
@@ -245,6 +247,7 @@
     "servers.badge.default": "Default",
     "servers.badge.enabled": "Enabled",
     "servers.badge.disabled": "Disabled",
+    "servers.badge.restart_needed": "Restart required",
     "servers.actions.edit": "Edit",
     "servers.actions.set_default": "Set default",
     "servers.actions.enable": "Enable",