Refactor: Implement DashboardLayout, fix mobile nav, and resolve scroll issues

app/api/sync/route.ts

@@ -0,0 +1,17 @@
+import { NextResponse } from 'next/server';
+import { getDatabase, saveDatabase } from '@/lib/server-db';
+
+export async function GET() {
+  const data = getDatabase();
+  return NextResponse.json(data);
+}
+
+export async function POST(req: Request) {
+  try {
+    const body = await req.json();
+    saveDatabase(body);
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    return NextResponse.json({ error: 'Invalid Data' }, { status: 400 });
+  }
+}