From 95b46a05e7ad346de8b97497a52b5a52b866b427 Mon Sep 17 00:00:00 2001
From: HIsheR <shawn1440982358@163.com>
Date: Mon, 26 Oct 2026 12:15:04 +0800
Subject: [PATCH] =?UTF-8?q?chore(backlog):=20=E8=AE=B0=E5=BD=95=20g51=20?=
 =?UTF-8?q?=E5=AE=8C=E6=88=90?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .ua/backlog.json   | 8 ++++++++
 .ua/iterations.log | 1 +
 2 files changed, 9 insertions(+)

diff --git a/.ua/backlog.json b/.ua/backlog.json
index 629dfaf..f54170f 100644
--- a/.ua/backlog.json
+++ b/.ua/backlog.json
@@ -764,6 +764,14 @@
       "acceptance": "新增 datePicker（单月网格、翻月、今天、min/max 闭区间、←→↑↓/PageUp/PageDown/Enter、Esc 入栈、value 信号）；manifest/docs/demo/README/计数同步；npm run check 全绿",
       "status": "done",
       "notes": "自补：表单组件补缺；跨月自动翻页，漫游 tabindex 只有焦点日可 Tab 进入"
+    },
+    {
+      "id": "g51",
+      "title": "新增 backTop 返回顶部按钮",
+      "motivation": "长文档/长表格页面缺少回顶入口，用户只能拖滚动条；进度环还能给出「还剩多少没看」的定位感",
+      "acceptance": "新增 backTop（阈值浮现、滚动进度环、平滑回顶且尊重 reduced-motion、支持内滚容器 target）；manifest/docs/demo/README/计数同步；npm run check 全绿",
+      "status": "done",
+      "notes": "自补：组件补充；进度环用 conic-gradient 内联写角度，不引入新令牌"
     }
   ]
 }
diff --git a/.ua/iterations.log b/.ua/iterations.log
index 5cca452..6806f93 100644
--- a/.ua/iterations.log
+++ b/.ua/iterations.log
@@ -95,3 +95,4 @@
 {"ts":"2026-10-26T12:11:45+08:00","id":"g48","result":"done","commit":"d7bfabb","summary":"新增 splitter 可拖拽分栏：指针拖拽+方向键微调+双击复位+min 夹逼+横纵两向，组件数 46→47"}
 {"ts":"2026-10-26T12:12:56+08:00","id":"g49","result":"done","commit":"cb8a9ea","summary":"新增 autoComplete 自动补全：输入即过滤、↑↓ 环形高亮、Enter 选中、Esc 入栈、options 支持函数式远程联想，组件数 47→48"}
 {"ts":"2026-10-26T12:14:00+08:00","id":"g50","result":"done","commit":"e270e09","summary":"新增 datePicker 日期选择：单月网格+翻月/今天+min-max 闭区间+逐日逐周逐月键盘导航，组件数 48→49"}
+{"ts":"2026-10-26T12:15:04+08:00","id":"g51","result":"done","commit":"b93b6dd","summary":"新增 backTop 返回顶部：阈值浮现+conic 进度环+平滑回顶（尊重 reduced-motion）+内滚容器支持，组件数 49→50"}