chore(backlog): 记录 g74 完成

.ua/backlog.json

@@ -948,6 +948,14 @@
       "acceptance": "分页容器加 role=navigation + aria-label；页码行数文本改 role=status aria-live=polite；npm run check 全绿",
       "status": "done",
       "notes": "自补：无障碍；live region 只在文本变化时播报，翻页/筛选都会触发"
+    },
+    {
+      "id": "g74",
+      "title": "弹窗与抽屉补 aria-labelledby 标题关联",
+      "motivation": "role=dialog 但没挂可访问名，读屏只会念「对话框」，用户不知道是哪个弹窗；标题元素本身也没有 id，无法被引用",
+      "acceptance": "modal/drawer 用模块级序号生成唯一标题 id 并挂 aria-labelledby，多实例不撞号；npm run check 全绿",
+      "status": "done",
+      "notes": "自补：无障碍；drawer 的 aria-hidden 与 open 同步逻辑未动"
     }
   ]
 }

.ua/iterations.log

@@ -118,3 +118,4 @@
 {"ts":"2026-10-26T12:40:29+08:00","id":"g71","result":"done","commit":"a6d0692","summary":"数据表可排序表头补 aria-sort 三态（ascending/descending/none），与视觉箭头同源"}
 {"ts":"2026-10-26T12:41:30+08:00","id":"g72","result":"done","commit":"2aaf30f","summary":"文档站搜索框补 aria-label 与 type=search，新增 sr-only 状态区播报匹配结果数"}
 {"ts":"2026-10-26T12:42:29+08:00","id":"g73","result":"done","commit":"ebd5793","summary":"表格底栏分页加 role=navigation 与 aria-label，页码行数改 role=status aria-live 播报"}
+{"ts":"2026-10-26T12:43:37+08:00","id":"g74","result":"done","commit":"640c286","summary":"modal/drawer 生成唯一标题 id 并挂 aria-labelledby，读屏能念出对话框名称"}