refactor(housekeeping): modal confirm, bulk delete, search debounce, audit inline, form reset

- Replace browser confirm() with custom ConfirmModal component
- Add search debounce (300ms) before syncing URL params
- Reset add-permission form after successful submit
- Add bulk select/delete with checkbox column and bulkDeletePermissions action
- AuditSection fetches logs server-side via getAuditLogs and shows inline table
- Add 10 new i18n keys (cancel, confirm, confirmDeletePermission,
  confirmBulkDelete, deleteSelected, confirmClearAllDesc,
  auditTime, auditUser, auditAction, auditTarget) synced to all 22 locales

src/messages/nl.json

@@ -1895,6 +1895,12 @@
 					"cancel": "Annuleren"
 				},
 				"confirmClearAll": "ALLE permissies verwijderen? Dit kan niet ongedaan worden gemaakt!",
+				"confirmClearAllDesc": "Dit verwijdert alle permissies uit de database. Weet je het zeker?",
+				"confirmDeletePermission": "Deze permissie permanent verwijderen?",
+				"confirmBulkDelete": "{count} geselecteerde permissies verwijderen?",
+				"deleteSelected": "Verwijder {count} geselecteerd",
+				"cancel": "Annuleren",
+				"confirm": "Bevestigen",
 				"colGroup": "Groep",
 				"colDepends": "Afhankelijk van",
 				"colPermission": "Permissie",
@@ -1957,7 +1963,11 @@
 				"auditTitle": "Permissie auditlog",
 				"auditHint": "Alle wijzigingen aan housekeeping permissies worden gelogd.",
 				"auditLogsAt": "Auditlogs zijn beschikbaar op de Auditlog-pagina.",
-				"viewAuditLogs": "Bekijk auditlogs"
+				"viewAuditLogs": "Bekijk auditlogs",
+				"auditTime": "Tijd",
+				"auditUser": "Gebruiker",
+				"auditAction": "Actie",
+				"auditTarget": "Doel"
 			},
 			"rooms": {
 				"title": "Kamers",