Initial commit: Kalendartool (Next.js, Prisma, Docker)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app/api/auth/logout/route.ts

@@ -0,0 +1,13 @@
+/** POST /api/auth/logout - beendet die Session (Cookie loeschen). */
+import { NextResponse } from 'next/server';
+import { clearSessionCookie } from '@/lib/auth/session';
+import { errorResponse } from '@/lib/api/responses';
+
+export async function POST(): Promise<NextResponse> {
+  try {
+    await clearSessionCookie();
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    return errorResponse(error);
+  }
+}