feat: initialize CalBook project with comprehensive scheduling, admin, and deployment infrastructure

lib/api.ts

@@ -0,0 +1,21 @@
+import { NextResponse } from "next/server";
+
+export function ok(data: unknown, status = 200) {
+  return NextResponse.json(data, { status });
+}
+
+export function fail(message: string, status = 400, details?: unknown) {
+  return NextResponse.json({ message, details }, { status });
+}
+
+export function handleAuthError(error: unknown) {
+  if (error instanceof Error) {
+    if (error.message === "UNAUTHORIZED") {
+      return fail("Nicht angemeldet", 401);
+    }
+    if (error.message === "FORBIDDEN") {
+      return fail("Keine Berechtigung", 403);
+    }
+  }
+  return fail("Interner Fehler", 500);
+}