feat: Claude Code Monitor — lanes, pipelines and a merged workspace

Internal SmartGift build of a Claude Code monitoring dashboard.

Lanes: a durable unit of parallel agent work, one per working directory,
tracked across session restarts. Managed lanes are git worktrees the
dashboard provisions and can reset or remove behind a three-check destroy
guard and a counted preflight; adopted lanes are directories you already
own and are never destroyable.

Pipelines: a lane moves through pipeline stages. A stage the agent declares
with evidence renders green; a stage inferred from the tool-event stream
renders dashed amber and never counts as done. Detection is forward-only
within a 30-minute window, and never writes the declared stage.

Workspace: one page at /run with a lane grid, the selected lane's pipeline,
and a full Claude console behind a disclosure.

server/routes/updates.js

@@ -0,0 +1,40 @@
+/**
+ * @file HTTP routes for dashboard upstream-update detection. The dashboard never
+ * restarts itself — users copy the printed command and run it in their terminal.
+ * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+ */
+
+const { Router } = require("express");
+const { getUpdatesStatus } = require("../lib/update-check");
+
+const router = Router();
+
+router.get("/status", async (_req, res) => {
+  try {
+    const status = await getUpdatesStatus();
+    res.json(status);
+  } catch (err) {
+    res.status(500).json({
+      error: { code: "UPDATE_STATUS_FAILED", message: err.message || String(err) },
+    });
+  }
+});
+
+router.post("/check", async (_req, res) => {
+  try {
+    const status = await getUpdatesStatus();
+    try {
+      const { broadcast } = require("../websocket");
+      broadcast("update_status", status);
+    } catch {
+      // WS not initialized (e.g. in isolated tests) — safe to ignore.
+    }
+    res.json(status);
+  } catch (err) {
+    res.status(500).json({
+      error: { code: "UPDATE_CHECK_FAILED", message: err.message || String(err) },
+    });
+  }
+});
+
+module.exports = router;