Add Meshkee product catalog navigation and details

Co-authored-by: Cursor <cursoragent@cursor.com>

app/api/meshkee/categories/route.ts

@@ -0,0 +1,17 @@
+import { fetchProductCategories } from "../../../lib/meshkee";
+
+export async function GET() {
+  try {
+    const items = await fetchProductCategories();
+    return Response.json(
+      { items },
+      {
+        headers: {
+          "Cache-Control": "public, max-age=300, stale-while-revalidate=3600",
+        },
+      },
+    );
+  } catch {
+    return Response.json({ items: [] }, { status: 502 });
+  }
+}