fix(vscode): repair WRN language diagnostics and activation

editors/vscode/test/completion.test.js

@@ -1,7 +1,18 @@
 "use strict";
 
 const assert = require("node:assert");
+const { test } = require("node:test");
+const Module = require("node:module");
+
+// These extraction helpers are pure, but their module also registers VS Code
+// providers at runtime. Supply a minimal host shim for unit tests.
+const originalLoad = Module._load;
+Module._load = function load(request, parent, isMain) {
+  if (request === "vscode") return {};
+  return originalLoad.call(this, request, parent, isMain);
+};
 const { extractRouteParams, extractStates } = require("../src/completion");
+Module._load = originalLoad;
 
 test("extracts dynamic route params from filename", () => {
   const document = {