rebuild app as turbopack-first single-stack with internal api and openclaw tasks

frontend/app/api/portfolio/refresh-prices/route.ts

@@ -0,0 +1,16 @@
+import { asErrorMessage, jsonError } from '@/lib/server/http';
+import { enqueueTask } from '@/lib/server/tasks';
+
+export async function POST() {
+  try {
+    const task = await enqueueTask({
+      taskType: 'refresh_prices',
+      payload: {},
+      priority: 80
+    });
+
+    return Response.json({ task });
+  } catch (error) {
+    return jsonError(asErrorMessage(error, 'Failed to queue refresh task'));
+  }
+}