chore(backlog): 记录 g169 完成

.ua/backlog.json

@@ -1708,6 +1708,14 @@
       "acceptance": "recipes.md 新增配方 11（grid 三列放 slider/datePicker/select + dataTable），要点写清「信号单一来源」「区间控件自带 clamp」「group/presets 的取舍」；verify 配方结构校验通过；llms-full.txt 与 MCP get_recipe 可取到。",
       "notes": "",
       "status": "done"
+    },
+    {
+      "id": "g169",
+      "title": "表单字段支持跨列",
+      "motivation": "columns: 2 的表单里，多行备注 / 地址这类字段只能各占一格，看上去被压成半宽；想整宽只能把 form 拆成两个再手拼，校验聚合也就断了。",
+      "acceptance": "formItem 新增 span：字段在栅格里占 N 列；grid 窄屏单列时用 !important 忽略跨列，避免撑出横向滚动；演示页两列表单加整宽备注；manifest 的 formItem 参数表与步骤、llms-full 同步；npm run check 全绿。",
+      "notes": "",
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -213,3 +213,4 @@
 {"ts":"2026-10-26T16:13:05+08:00","id":"g166","result":"done","commit":"a80644c","summary":"select/multiSelect 支持 option.group 分组小标题（过滤后空组标题隐藏）"}
 {"ts":"2026-10-26T16:14:19+08:00","id":"g167","result":"done","commit":"ff94429","summary":"modal 新增 confirmText/cancelText/onConfirm 内置页脚，Promise 期间按钮转处理中"}
 {"ts":"2026-10-26T16:14:59+08:00","id":"g168","result":"done","commit":"879be29","summary":"配方 11：区间滑块 + 日期预设 + 分组下拉 + 表格的筛选区拼装"}
+{"ts":"2026-10-26T16:16:07+08:00","id":"g169","result":"done","commit":"bd98fc8","summary":"formItem 新增 span 跨列（窄屏/单列自动退回整行）"}