iter(g60): 新增 multiSelect 多选下拉组件

.ua/index.json

@@ -1,6 +1,6 @@
 {
   "$schema": "ui-arch-registry-index/0.1",
-  "generatedAt": "2026-10-26T04:23:09.567Z",
+  "generatedAt": "2026-10-26T04:24:59.738Z",
   "repoRoot": ".",
   "packages": [
     {
@@ -198,7 +198,8 @@
           "tour(props)：引导漫游，返回 { el, start, close } 句柄；聚光框按 target 选择器定位，卡片自动选方位，Esc / 跳过走 onClose",
           "watermark(props, ...children)：内容容器 + 平铺水印覆盖层，canvas 生成单元、颜色取自令牌，覆盖层不挡交互",
           "checkboxGroup(props)：多选组，value 为数组信号，min/max 用禁用边界项实现（不抛错），checkAll 支持半选且只统计未禁用项",
-          "affix(props, ...children)：固钉，滚过 offset 后内容转 fixed 贴顶、外层保留占位高度，固定后宽度随容器自适应"
+          "affix(props, ...children)：固钉，滚过 offset 后内容转 fixed 贴顶、外层保留占位高度，固定后宽度随容器自适应",
+          "multiSelect(props)：多选下拉，标签式回显 + 可搜索弹层，点选不收起便于连续多选，max 到限后未选项禁用"
         ],
         "keyTypes": [
           "ButtonProps",
@@ -2549,6 +2550,57 @@
               "固定期间宽度与横向位置跟随占位容器，窗口缩放或父容器变宽都自动贴合",
               "内滚容器场景把该元素传给 target，判定改为基于它的滚动位置"
             ]
+          },
+          {
+            "id": "multiSelect",
+            "title": "多选下拉 MultiSelect",
+            "demo": "sec-multiselect",
+            "props": [
+              {
+                "n": "options",
+                "t": "CheckOption[]",
+                "r": 1,
+                "d": "选项集合：value / label / 可选 disabled"
+              },
+              {
+                "n": "value",
+                "t": "Signal<string[]>",
+                "d": "选中值数组信号；不传则内部维护"
+              },
+              {
+                "n": "placeholder",
+                "t": "string",
+                "d": "未选时占位文案；已选时让位给标签"
+              },
+              {
+                "n": "max",
+                "t": "number",
+                "d": "最多选几项：到上限后未选项自动禁用"
+              },
+              {
+                "n": "searchable",
+                "t": "boolean",
+                "d": "是否可输入过滤；缺省 true"
+              },
+              {
+                "n": "disabled",
+                "t": "boolean | Signal<boolean>",
+                "d": "禁用整个下拉"
+              },
+              {
+                "n": "onChange",
+                "t": "(values: string[]) => void",
+                "d": "变更回调（传副本）"
+              }
+            ],
+            "example": "multiSelect({ value: tagPick, max: 3, placeholder: '选择技术栈', options: [{ value: 'ts', label: 'TypeScript' }, { value: 'css', label: 'CSS 令牌' }] })",
+            "steps": [
+              "选中项以标签形式回显，点标签上的 × 或空输入时按退格即可删除末个标签",
+              "点输入区展开弹层并聚焦输入框，输入字符即时过滤（大小写不敏感）",
+              "点选项只切换该项、弹层不收起，适合连续多选；到 max 后未选项置灰不可点",
+              "↑↓ 环形移动高亮、Enter 切换当前项、Esc 收起（与其它弹层共用一个 Esc 栈）",
+              "value 传数组信号即受控，外部写入会同步标签区"
+            ]
           }
         ]
       },