diff --git a/.ua/backlog.json b/.ua/backlog.json
index b65773b..8c599d0 100644
--- a/.ua/backlog.json
+++ b/.ua/backlog.json
@@ -2402,6 +2402,15 @@
       "status": "done",
       "notes": "nearestMinute(mm) 取 Math.round(mm/step) 下标并钳到列尾，空值/NaN 直接返回空串；column 内引入 activeText()：时列精确比、分列走最近档，is-active 与 aria-selected 同源（原先两处各写一遍比较）；打开时锚点改为「有值滚值（时取 Number(hh)、分取 nearest 的下标）、无值滚此刻」；点最近档 commit 时按当前 hh + 档值写回，触发器在用户重选前仍显示原值；manifest steps 补一条说明该行为；check 全绿、audit 十一类 0（踩坑：bash -e 内联脚本里的反引号被命令替换吃掉，改用 Edit 工具精改模板字符串）",
       "domain": "tune"
+    },
+    {
+      "id": "g224",
+      "title": "timePicker 收起态 ↑↓ 微调时间",
+      "motivation": "表单里最常做的是「往后挪 15 分钟」这种微调，现在必须开弹层、找到分列、点格子、再收起；inputNumber 早就有 ↑↓ 步进，时间选择却没有对应的键盘手感。",
+      "acceptance": "收起态聚焦触发器时 ↑↓ 按 minuteStep 加减、Shift + ↑↓ 按小时加减，跨 00:00 / 23:59 环形回绕，写回与收起态清空共用同一套 keydown；展开态按键仍归列内导航；manifest 步骤说明；npm run check 全绿。",
+      "status": "done",
+      "notes": "root 的 keydown 收成三段：展开态直接让位给列内导航 → 收起态 clearable 时接管 Backspace/Delete → 有值时接管 ↑↓（delta = ±(shiftKey ? 60 : step)，总分钟数 +1440 取模实现环形），写回走同一个 commit（值没变不派发）；timePicker.ts 159 行仍在 200 行门禁内；manifest steps 补第 9 条说明步长与 Shift 语义",
+      "domain": "tune"
     }
   ]
 }
diff --git a/.ua/iterations.log b/.ua/iterations.log
index 2e7b9b3..8a2556a 100644
--- a/.ua/iterations.log
+++ b/.ua/iterations.log
@@ -267,3 +267,4 @@
 {"ts":"2026-10-26T20:02:26+08:00","id":"g221","result":"done","commit":"92bc8bb","summary":"verify 新增 checkScrollCoverage：括号配平扫出全部 overflow 容器，逐个核对是否在细条规则内（14/14 覆盖），负向自检摘掉 .ua-timepicker-col 即报错"}
 {"ts":"2026-10-26T20:03:19+08:00","id":"g222","result":"done","commit":"3067c63","summary":"timePicker 补 size 三档：高度并入顶部「控件高度三档」统一规则、组件段删掉重复高度声明，与 textField/select 同源"}
 {"ts":"2026-10-26T20:04:32+08:00","id":"g223","result":"done","commit":"126da05","summary":"timePicker 非档值（如 09:07 + 15 分钟档）改为按最近档高亮与滚动，锚点优先跟值，消除「有值却无高亮」的空弹层"}
+{"ts":"2026-10-26T20:05:13+08:00","id":"g224","result":"done","commit":"63351dc","summary":"timePicker 收起态支持 ↑↓ 按步长微调、Shift + ↑↓ 按小时微调，跨零点环形回绕，与收回合同一套 keydown"}