feat: add workspace service and route for directory management

packages/backend/src/routes/workspace.ts

@@ -0,0 +1,29 @@
+import { Router } from "express";
+import {
+  ensureWorkspaceStructure,
+  readConfig,
+  writeConfig,
+  getWorkspacePath,
+} from "../services/workspace.service.js";
+
+const router = Router();
+
+router.get("/config", async (_req, res) => {
+  const config = await readConfig();
+  const sanitized = { ...config, githubPat: config.githubPat ? "***" : undefined };
+  res.json(sanitized);
+});
+
+router.put("/config", async (req, res) => {
+  const current = await readConfig();
+  const updated = { ...current, ...req.body };
+  await writeConfig(updated);
+  res.json({ ok: true });
+});
+
+router.post("/init", async (_req, res) => {
+  await ensureWorkspaceStructure();
+  res.json({ ok: true, path: getWorkspacePath() });
+});
+
+export default router;