iter(g159): 多选下拉支持标签折叠

.ua/index.json

@@ -1,6 +1,6 @@
 {
   "$schema": "ui-arch-registry-index/0.1",
-  "generatedAt": "2026-10-26T08:00:04.262Z",
+  "generatedAt": "2026-10-26T08:02:08.033Z",
   "repoRoot": ".",
   "packages": [
     {
@@ -2987,6 +2987,11 @@
                 "t": "number",
                 "d": "最多选几项：到上限后未选项自动禁用"
               },
+              {
+                "n": "maxTagCount",
+                "t": "number",
+                "d": "标签区最多显示几个，超出的折成一枚「+N」（悬停看全量、点击展开弹层）；缺省全部显示"
+              },
               {
                 "n": "searchable",
                 "t": "boolean",
@@ -3009,7 +3014,8 @@
               "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"
+              "value 传数组信号即受控，外部写入会同步标签区",
+              "选中项多时传 maxTagCount: 2 折叠：前 2 枚标签照常逐个删除，其余折成虚线「+N」，悬停 title 给出被折叠的项名，点它直接展开弹层；受控数组一变折叠数就重算"
             ]
           },
           {