diff --git a/vscode/webview-ui/src/components/property-grid.tsx b/vscode/webview-ui/src/components/property-grid.tsx
index 3245996..fcd165d 100644
--- a/vscode/webview-ui/src/components/property-grid.tsx
+++ b/vscode/webview-ui/src/components/property-grid.tsx
@@ -531,6 +531,11 @@ function PropertyRow({
         ref={el => registerCellRef(fullKey, el)}
         data-property-cell={fullKey}
         onClickCapture={(e) => {
+          // portal 弹层对祖先捕获处理器隐身：点击落在 SelectMenu 弹层内时不选中也不拦截，
+          // 让 click 正常落到选项按钮，避免被外层的 stopPropagation/preventDefault 吞掉。
+          const src = e.target
+          if (src instanceof Element && src.closest('[data-select-menu]'))
+            return
           if (isSelected)
             return
           onSelect(fullKey)
@@ -606,8 +611,11 @@ export function PropertyGrid({
     if (selectedKey == null)
       return
     function handleMouseDown(e: MouseEvent): void {
+      const t = e.target
+      if (!(t instanceof Node))
+        return
       const root = rootRef.current
-      if (root && e.target instanceof Node && !root.contains(e.target))
+      if (root && !root.contains(t) && !(t instanceof Element && t.closest('[data-select-menu]')))
         setSelectedKey(null)
     }
     document.addEventListener('mousedown', handleMouseDown)
diff --git a/vscode/webview-ui/src/components/ui/select-menu.tsx b/vscode/webview-ui/src/components/ui/select-menu.tsx
index ccb022c..128e6f8 100644
--- a/vscode/webview-ui/src/components/ui/select-menu.tsx
+++ b/vscode/webview-ui/src/components/ui/select-menu.tsx
@@ -211,6 +211,7 @@ export function SelectMenu({
         <div
           ref={menuRef}
           role="listbox"
+          data-select-menu=""
           tabIndex={-1}
           className="fixed z-50 overflow-auto rounded border border-[var(--vscode-panel-border)] bg-[var(--vscode-editorWidget-background,var(--vscode-editor-background))] shadow-md"
           style={{ top: pos.top, left: pos.left, width: pos.width, maxHeight: MAX_MENU_HEIGHT }}