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

packages/features/fischerei/src/components/fischerei-tab-navigation.tsx

@@ -0,0 +1,54 @@
+'use client';
+
+import Link from 'next/link';
+import { usePathname } from 'next/navigation';
+import { cn } from '@kit/ui/utils';
+
+interface FischereiTabNavigationProps {
+  account: string;
+  activeTab: string;
+}
+
+const TABS = [
+  { id: 'overview', label: 'Übersicht', path: '' },
+  { id: 'waters', label: 'Gewässer', path: '/waters' },
+  { id: 'species', label: 'Fischarten', path: '/species' },
+  { id: 'stocking', label: 'Besatz', path: '/stocking' },
+  { id: 'leases', label: 'Pachten', path: '/leases' },
+  { id: 'catch-books', label: 'Fangbücher', path: '/catch-books' },
+  { id: 'permits', label: 'Erlaubnisscheine', path: '/permits' },
+  { id: 'competitions', label: 'Wettbewerbe', path: '/competitions' },
+  { id: 'statistics', label: 'Statistiken', path: '/statistics' },
+] as const;
+
+export function FischereiTabNavigation({
+  account,
+  activeTab,
+}: FischereiTabNavigationProps) {
+  const basePath = `/home/${account}/fischerei`;
+
+  return (
+    <div className="mb-6 border-b">
+      <nav className="-mb-px flex space-x-1 overflow-x-auto" aria-label="Fischerei Navigation">
+        {TABS.map((tab) => {
+          const isActive = tab.id === activeTab;
+
+          return (
+            <Link
+              key={tab.id}
+              href={`${basePath}${tab.path}`}
+              className={cn(
+                'whitespace-nowrap border-b-2 px-4 py-2.5 text-sm font-medium transition-colors',
+                isActive
+                  ? 'border-primary text-primary'
+                  : 'border-transparent text-muted-foreground hover:border-muted-foreground/30 hover:text-foreground',
+              )}
+            >
+              {tab.label}
+            </Link>
+          );
+        })}
+      </nav>
+    </div>
+  );
+}