Navigation: gemeinsamer Kopfbereich statt getrennter Bereiche

Eine Leiste für alles: Gruppe "Speiseplan" (Wochenplan, Gerichte,
Allergene & Zusatzstoffe) und für Admins zusätzlich Gruppe
"Verwaltung" (Benutzer, Design). Aktiver Menüpunkt wird hervorgehoben,
die Konto-Seite nutzt denselben Header – kein Hin- und Herspringen
mehr zwischen Kantinen-Bereich und Verwaltung.

app/admin/layout.tsx

@@ -1,6 +1,6 @@
-import Link from "next/link";
 import { redirect } from "next/navigation";
 import { createClient } from "@/lib/supabase/server";
+import AppHeader from "@/components/AppHeader";
 
 export default async function AdminLayout({
   children,
@@ -22,35 +22,10 @@ export default async function AdminLayout({
 
   return (
     <div className="flex-1 flex flex-col">
-      <header className="bg-[var(--c-primary-dark)] text-white">
-        <div className="max-w-[1600px] mx-auto w-full px-4 py-3 flex flex-wrap items-center gap-x-5 gap-y-2">
-          <span className="font-bold">Verwaltung</span>
-          <nav className="flex flex-wrap gap-x-4 gap-y-1 text-sm">
-            <Link href="/admin" className="hover:underline">
-              Benutzer
-            </Link>
-            <Link href="/admin/design" className="hover:underline">
-              Design
-            </Link>
-            <Link href="/intern" className="hover:underline">
-              Kantinen-Bereich
-            </Link>
-            <Link href="/" className="hover:underline">
-              Zur Speisekarte
-            </Link>
-          </nav>
-          <div className="ml-auto flex items-center gap-3 text-sm">
-            <Link href="/konto" className="text-white/70 hover:underline">
-              {profile.full_name || user.email}
-            </Link>
-            <form action="/logout" method="post">
-              <button type="submit" className="btn btn-del">
-                Abmelden
-              </button>
-            </form>
-          </div>
-        </div>
-      </header>
+      <AppHeader
+        role="admin"
+        displayName={profile.full_name || user.email || ""}
+      />
       <main className="max-w-[1600px] mx-auto w-full px-4 py-6 flex-1">
         {children}
       </main>

app/intern/layout.tsx

@@ -1,6 +1,6 @@
-import Link from "next/link";
 import { redirect } from "next/navigation";
 import { createClient } from "@/lib/supabase/server";
+import AppHeader from "@/components/AppHeader";
 
 export default async function InternLayout({
   children,
@@ -22,40 +22,10 @@ export default async function InternLayout({
 
   return (
     <div className="flex-1 flex flex-col">
-      <header className="bg-[var(--c-primary-dark)] text-white">
-        <div className="max-w-[1600px] mx-auto w-full px-4 py-3 flex flex-wrap items-center gap-x-5 gap-y-2">
-          <span className="font-bold">Kantinen-Bereich</span>
-          <nav className="flex flex-wrap gap-x-4 gap-y-1 text-sm">
-            <Link href="/intern" className="hover:underline">
-              Wochenplan
-            </Link>
-            <Link href="/intern/gerichte" className="hover:underline">
-              Gerichte
-            </Link>
-            <Link href="/intern/kennzeichnung" className="hover:underline">
-              Allergene &amp; Zusatzstoffe
-            </Link>
-            {profile.role === "admin" && (
-              <Link href="/admin" className="hover:underline">
-                Verwaltung
-              </Link>
-            )}
-            <Link href="/" className="hover:underline">
-              Zur Speisekarte
-            </Link>
-          </nav>
-          <div className="ml-auto flex items-center gap-3 text-sm">
-            <Link href="/konto" className="text-white/70 hover:underline">
-              {profile.full_name || user.email}
-            </Link>
-            <form action="/logout" method="post">
-              <button type="submit" className="btn btn-del">
-                Abmelden
-              </button>
-            </form>
-          </div>
-        </div>
-      </header>
+      <AppHeader
+        role={profile.role}
+        displayName={profile.full_name || user.email || ""}
+      />
       <main className="max-w-[1600px] mx-auto w-full px-4 py-6 flex-1">
         {children}
       </main>

app/konto/page.tsx

@@ -1,6 +1,6 @@
 import { redirect } from "next/navigation";
-import Link from "next/link";
 import { createClient } from "@/lib/supabase/server";
+import AppHeader from "@/components/AppHeader";
 import AccountManager from "@/components/AccountManager";
 
 export default async function KontoPage() {
@@ -19,19 +19,10 @@ export default async function KontoPage() {
 
   return (
     <div className="flex-1 flex flex-col">
-      <header className="bg-[var(--c-primary-dark)] text-white">
-        <div className="max-w-[1600px] mx-auto w-full px-4 py-3 flex flex-wrap items-center gap-x-5 gap-y-2">
-          <span className="font-bold">Mein Konto</span>
-          <nav className="ml-auto flex flex-wrap gap-x-4 gap-y-1 text-sm">
-            <Link
-              href={profile.role === "admin" ? "/admin" : "/intern"}
-              className="hover:underline"
-            >
-              ← Zurück
-            </Link>
-          </nav>
-        </div>
-      </header>
+      <AppHeader
+        role={profile.role}
+        displayName={profile.full_name || user.email || ""}
+      />
       <main className="max-w-[1600px] mx-auto w-full px-4 py-6 flex-1">
         <AccountManager
           role={profile.role}