import assert from "node:assert/strict";import test from "node:test";import { highlightFenced, highlightLines } from "../src/features/agent/highlight-cache"; test("highlights code languages used by the filesystem and tool previews", () => {  assert.match(highlightFenced("css", ".card { color: red; }"), /hljs-selector-class/);  assert.match(highlightFenced("java", "class Studio {}"), /hljs-keyword/);  assert.match(highlightFenced("toml", "port = 8080"), /hljs-attr/);}); test("preserves embedded language context across filesystem lines", () => {  const rendered = highlightLines("html", ["<style>", ".card { color: red; }", "</style>"]);  assert.equal(rendered.length, 3);  assert.match(rendered[1] ?? "", /language-css/);  assert.match(rendered[1] ?? "", /hljs-selector-class/);  for (const line of rendered) {    assert.equal(line.match(/<span/g)?.length ?? 0, line.match(/<\/span>/g)?.length ?? 0);  }});