implented adding year-month

app/year-month/[id]/add/page.tsx

@@ -0,0 +1,11 @@
+import { addYearMonth } from '@/app/lib/yearMonthActions';
+import { revalidatePath } from 'next/cache';
+import { redirect } from 'next/navigation';
+
+export default async function Page({ params:{ id } }: { params: { id:string } }) {
+
+    await addYearMonth(id);
+
+    revalidatePath('/');
+    redirect(`/`);
+}