chore(backlog): 记录 g296 完成

.ua/backlog.json

@@ -3054,11 +3054,11 @@
     {
       "id": "g296",
       "domain": "tune",
-      "status": "open",
+      "status": "done",
       "title": "修 form 校验失败仍提交：自绘控件字段没有原生 input 时守卫失效",
       "motivation": "提交守卫写成「找到焦点目标才中止」，而焦点目标只查 input/textarea/select；非搜索式下拉、评分、开关容器里没有原生 input，firstBad 为 null 时校验有错也照样调 onSubmit（demo 的「城市」必填下拉即可复现）。",
       "acceptance": "① 中止判据改为错误条数 bad > 0；② 焦点落点按 控件 → 触发器(button/[tabindex]) → 字段容器(tabIndex=-1) 三级退让；③ manifest 的 form 步骤与 demo 描述同步说明；④ npm run check 全绿。",
-      "notes": ""
+      "notes": "form 提交守卫改判错误条数；焦点按 控件 → 触发器 → 字段容器(tabIndex=-1) 三级退让，自绘控件字段也能被定位并拦住提交"
     }
   ]
 }

.ua/iterations.log

@@ -340,3 +340,4 @@
 {"ts":"2026-10-26T23:22:14+08:00","id":"g293","result":"done","commit":"beca3d8","summary":"AGENTS 强制约定补第 7 条：浮层打开算一次 + 展开期 trackShift + 收起摘监听"}
 {"ts": "2026-10-26T23:32:40+08:00", "id": "g294", "result": "done", "commit": "3914d5d", "summary": "dataTable 加「列」面板（勾选显隐、末列锁死）+ 受控 hiddenColumns；桥接抽成 tableBridge，导出跟随可见列"}
 {"ts": "2026-10-26T23:36:02+08:00", "id": "g295", "result": "done", "commit": "3533459", "summary": "新增 ua audit:surface 逐档验表面阶梯；surface-2/3 改从 surface 派生，悬停底亮度比 1.008→1.123"}
+{"ts": "2026-10-26T23:37:21+08:00", "id": "g296", "result": "done", "commit": "2c0a760", "summary": "form 校验失败必定中止（判据改错误数），焦点三级退让到触发器/字段容器，自绘控件字段不再漏过"}