chore(backlog): 记录 g82 完成

.ua/backlog.json

@@ -1019,7 +1019,7 @@
       "motivation": "accept 只设到原生 input 上，拖拽进来的文件完全绕过校验；也没有体积与数量上限，超限只能靠调用方在 onChange 里事后过滤，用户看不到为什么文件没进清单（静默丢弃）",
       "acceptance": "新增 maxSize（字节）/ maxCount（多选上限）两个可选参数；accept 支持 .ext / type/subtype / type/* 且对拖拽同样生效；被拒文件不进清单并在 role=status 提示行写明原因（类型不符 / 超上限 / 数量已满）；不改onChange 语义；文档与演示同步；npm run check 全绿",
       "notes": "自补：可用性；校验入口收敛到 add()，点选与拖拽共用同一条路径",
-      "status": "open"
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -126,3 +126,4 @@
 {"ts":"2026-10-26T12:57:15+08:00","id":"g79","result":"done","commit":"2c0b9fd","summary":"可排序表头进 Tab 序，Enter/空格 与点击共用同一 toggle，补 scope=col"}
 {"ts":"2026-10-26T12:58:08+08:00","id":"g80","result":"done","commit":"c324afc","summary":"通知自动关闭改为可暂停：悬停/聚焦扣减已流逝时间，离开按剩余续计"}
 {"ts":"2026-10-26T12:58:56+08:00","id":"g81","result":"done","commit":"f3c83e9","summary":"树改 roving tabindex：整棵树一个 Tab 停点，focusin 跟随焦点，keydown 复用 keyOf"}
+{"ts":"2026-10-26T13:00:21+08:00","id":"g82","result":"done","commit":"37412b3","summary":"upload 新增 maxSize/maxCount，accept 对拖拽生效，拒收原因走 role=status 提示行"}