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]/bookings/calendar/page.tsx

@@ -10,6 +10,7 @@ import { Card, CardContent, CardHeader, CardTitle } from '@kit/ui/card';
 import { createBookingManagementApi } from '@kit/booking-management/api';
 
 import { CmsPageShell } from '~/components/cms-page-shell';
+import { AccountNotFound } from '~/components/account-not-found';
 
 interface PageProps {
   params: Promise<{ account: string }>;
@@ -56,7 +57,13 @@ export default async function BookingCalendarPage({ params }: PageProps) {
     .eq('slug', account)
     .single();
 
-  if (!acct) return <div>Konto nicht gefunden</div>;
+  if (!acct) {
+    return (
+      <CmsPageShell account={account} title="Belegungskalender">
+        <AccountNotFound />
+      </CmsPageShell>
+    );
+  }
 
   const api = createBookingManagementApi(client);
 
@@ -128,12 +135,9 @@ export default async function BookingCalendarPage({ params }: PageProps) {
                 <ArrowLeft className="h-4 w-4" />
               </Button>
             </Link>
-            <div>
-              <h1 className="text-2xl font-bold">Belegungskalender</h1>
-              <p className="text-muted-foreground">
-                Zimmerauslastung im Überblick
-              </p>
-            </div>
+            <p className="text-muted-foreground">
+              Zimmerauslastung im Überblick
+            </p>
           </div>
         </div>