fix: UX improvements for German association users

- fix(member-detail): display gender in German (Männlich/Weiblich/Divers)
  instead of raw English enum values (male/female/diverse)

- fix(member-detail): display country names in German (Österreich, Deutschland)
  instead of raw ISO codes (AT, DE)

- fix(member-statistics): total member count was always 0
  getStatistics() returns per-status counts without a total key;
  now computes total by summing all status counts

- fix(i18n): add 56 breadcrumb segment translations for DE and EN
  Breadcrumbs were showing English path segments (Courses, Calendar,
  Registrations) because translation keys for URL path segments were
  missing. Added all segment-level route translations so breadcrumbs
  now display in German throughout the app.

apps/web/app/[locale]/home/[account]/members-cms/statistics/page.tsx

@@ -35,7 +35,11 @@ export default async function MemberStatisticsPage({ params }: PageProps) {
   if (!acct) return <AccountNotFound />;
 
   const { query } = createMemberServices(client);
-  const stats = await query.getStatistics(acct.id);
+  const statsRaw = await query.getStatistics(acct.id);
+
+  // Compute total from individual status counts
+  const total = Object.values(statsRaw).reduce((a, b) => a + b, 0);
+  const stats = { ...statsRaw, total };
 
   const statusChartData = [
     { name: t('status.active'), value: stats.active ?? 0 },