i18n observability hub: analytics pages and log tables.

Translate analytics overview/activity/economy plus peak-hours/revenue charts, and audit/chat/commands/trades DataTables (en/nl/it). Includes prior events/polls detail i18n.

Co-authored-by: Cursor <[email protected]>

src/app/admin/logs/page.tsx

@@ -88,7 +88,7 @@ export default async function AdminStaffActivities({
 		when: fromDate(a.createdAt),
 		staff: t("staffWithId", {
 			id: Number(a.userId),
-			name: nameById.get(Number(a.userId)) ?? "unknown",
+			name: nameById.get(Number(a.userId)) ?? t("unknownUser"),
 		}),
 		action: a.action,
 		description: a.description,