chore: [ui] date-picker, searchable-select 불필요 코드 제거

src/components/ui/date-picker.tsx

@@ -163,15 +163,6 @@ function DatePicker({
         align={align}
         side={side}
         sideOffset={sideOffset}
-        onPointerDownOutside={(e) => {
-          // Popover가 Portal로 렌더링되어, Dialog 안이나 Windows 환경에서
-          // 날짜 클릭이 "외부 클릭"으로 오인되는 것을 방지
-          // 닫기는 handleSelect(날짜선택) / Escape / 트리거 토글로 처리
-          e.preventDefault();
-        }}
-        onInteractOutside={(e) => {
-          e.preventDefault();
-        }}
       >
         <div className="p-3">
           {showMonthPicker ? (

src/components/ui/searchable-select.tsx

@@ -191,8 +191,6 @@ export function SearchableSelect({
       <PopoverContent
         className="w-[--radix-popover-trigger-width] p-0"
         align="start"
-        onPointerDownOutside={(e) => e.preventDefault()}
-        onInteractOutside={(e) => e.preventDefault()}
       >
         <Command shouldFilter={!isServerSearch}>
           <CommandInput