added install script for agent

changed backend to agent

agent/src/routes/jobs.js

@@ -0,0 +1,17 @@
+import { Router } from 'express';
+import { getJob, listJobs } from '../jobs.js';
+
+export const jobsRouter = Router();
+
+jobsRouter.get('/', (_req, res) => {
+  res.json(listJobs());
+});
+
+jobsRouter.get('/:jobId', (req, res) => {
+  const job = getJob(req.params.jobId);
+  if (!job) {
+    res.status(404).json({ error: 'Job not found.' });
+    return;
+  }
+  res.json(job);
+});