chore(backlog): 记录 g119 完成

.ua/backlog.json

@@ -1315,7 +1315,7 @@
       "motivation": "empty 的图标位写死成 ⌀，业务方几乎都会换成自己的插图（搜索无结果用放大镜、空订单用纸箱）；现在只能在外面再包一层插画 div，既影响居中节奏又和组件内置图标同屏",
       "acceptance": "EmptyProps 新增 icon（unknown）：字符串或图标 DOM 直接进图标位，缺省仍是 ⌀；图标位保持 aria-hidden，语义由 title / description 承担；文档参数表 / 手把手与演示（搜索无结果换成 🔍）同步；npm run check 全绿",
       "notes": "自补：可用性；一个可选参数透传，行为向后兼容",
-      "status": "open"
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -163,3 +163,4 @@
 {"ts":"2026-10-26T14:10:22+08:00","id":"g116","result":"done","commit":"2ab9406","summary":"drawer 新增 modal:false：透明遮罩不锁滚动不困焦点，页面可继续操作"}
 {"ts":"2026-10-26T14:11:13+08:00","id":"g117","result":"done","commit":"6cf4905","summary":"新增 trackSize（ResizeObserver 自断），tabs 指示条与 segmented 滑块随尺寸重算"}
 {"ts":"2026-10-26T14:11:42+08:00","id":"g118","result":"done","commit":"123e7e6","summary":"重新生成 CHANGELOG（309 提交），本次唤起 18 轮收尾"}
+{"ts":"2026-10-26T14:12:37+08:00","id":"g119","result":"done","commit":"176504b","summary":"empty 新增 icon：自定义插图进图标位，缺省 ⌀ 且保持 aria-hidden"}