iter(g341): 表单错误文案补 aria-describedby 关联

packages/tools/cli/bin/ua.js

@@ -1670,6 +1670,21 @@ function checkToastLive(pkgs) {
   return issues;
 }
 
+/*** 校验表单错误关联：只标 aria-invalid 时读屏只说「无效」，原因（哪条规则没过）听不到 ***/
+function checkFormErrorLink(pkgs) {
+  const issues = [];
+  for (const pkg of pkgs) {
+    if (pkg.type !== 'skin-dom') continue;
+    const formPath = path.join(ROOT, pkg.dir, 'src', 'form.ts');
+    if (!fs.existsSync(formPath)) continue;
+    const src = fs.readFileSync(formPath, 'utf8');
+    if (!/id: `\$\{fid\}-error`/.test(src)) issues.push(`${pkg.name}/src/form.ts 的错误区缺派生 id：没有 id 就无法被 aria-describedby 指过来`);
+    if (!/setAttribute\('aria-describedby', described\)/.test(src)) issues.push(`${pkg.name}/src/form.ts 缺 aria-describedby 落笔：校验失败时读屏只会念「无效」，念不出「至少 6 个字符」这类原因`);
+    if (!/removeAttribute\('aria-describedby'\)/.test(src)) issues.push(`${pkg.name}/src/form.ts 缺 aria-describedby 清除：校验通过后关联还指着错误区，读屏会把空节点当说明`);
+  }
+  return issues;
+}
+
 /*** 校验同义词表：目标 id 必须真实存在（改名后残留会让回退指到空气），同一个词不得归两组（歧义会让结果随表序漂移） ***/
 function checkSynonyms(ids) {
   const issues = [];
@@ -1752,6 +1767,7 @@ function cmdVerify() {
   issues.push(...checkReadme(pkgs));
   issues.push(...checkAriaNames(pkgs)); // 输入控件必须有可访问名
   issues.push(...checkToastLive(pkgs)); // toast 必须有 live 区域与 alert 抢占
+  issues.push(...checkFormErrorLink(pkgs)); // 表单错误文案必须被控件关联
   issues.push(...checkSynonyms(new Set(pkgs.flatMap((p) => (p.docs?.components ?? []).map((c) => c.id))))); // 同义词表指向的组件必须真实存在
   checkDarkTokens(issues);
   checkTokenParity(issues);