feat: complete CMS v2 with Docker, Fischerei, Meetings, Verband modules + UX audit fixes

Major changes:
- Docker Compose: full Supabase stack (11 services) equivalent to supabase CLI
- Fischerei module: 16 DB tables, waters/species/stocking/catch books/competitions
- Sitzungsprotokolle module: meeting protocols, agenda items, task tracking
- Verbandsverwaltung module: federation management, member clubs, contacts, fees
- Per-account module activation via Modules page toggle
- Site Builder: live CMS data in Puck blocks (courses, events, membership registration)
- Public registration APIs: course signup, event registration, membership application
- Document generation: PDF member cards, Excel reports, HTML labels
- Landing page: real Com.BISS content (no filler text)
- UX audit fixes: AccountNotFound component, shared status badges, confirm dialog,
  pagination, duplicate heading removal, emoji→badge replacement, a11y fixes
- QA: healthcheck fix, API auth fix, enum mismatch fix, password required attribute

apps/web/app/[locale]/home/[account]/newsletter/templates/page.tsx

@@ -11,6 +11,7 @@ import { createNewsletterApi } from '@kit/newsletter/api';
 
 import { CmsPageShell } from '~/components/cms-page-shell';
 import { EmptyState } from '~/components/empty-state';
+import { AccountNotFound } from '~/components/account-not-found';
 
 interface PageProps {
   params: Promise<{ account: string }>;
@@ -26,7 +27,7 @@ export default async function NewsletterTemplatesPage({ params }: PageProps) {
     .eq('slug', account)
     .single();
 
-  if (!acct) return <div>Konto nicht gefunden</div>;
+  if (!acct) return <AccountNotFound />;
 
   const api = createNewsletterApi(client);
   const templates = await api.listTemplates(acct.id);