fix: Improve option filtering in V2Select component

- Updated the option filtering logic to handle null and undefined values, preventing potential crashes when cmdk encounters these values.
- Introduced a safeOptions variable to ensure that only valid options are processed in the dropdown and command list.
- Enhanced the setOptions function to sanitize fetched options, ensuring that only valid values are set, improving overall stability and user experience.

frontend/components/v2/V2Select.tsx

@@ -80,7 +80,7 @@ const DropdownSelect = forwardRef<HTMLButtonElement, {
           </SelectTrigger>
           <SelectContent>
             {options
-              .filter((option) => option.value !== "")
+              .filter((option) => option.value != null && option.value !== "")
               .map((option) => (
                 <SelectItem key={option.value} value={option.value}>
                   {option.label}
@@ -112,6 +112,12 @@ const DropdownSelect = forwardRef<HTMLButtonElement, {
   }
 
   // 검색 가능 또는 다중 선택 → Combobox 사용
+  // null/undefined value를 가진 옵션 필터링 (cmdk가 value={null}일 때 크래시 발생)
+  const safeOptions = useMemo(() => 
+    options.filter((o) => o.value != null && o.value !== ""),
+    [options]
+  );
+
   const selectedValues = useMemo(() => {
     if (!value) return [];
     return Array.isArray(value) ? value : [value];
@@ -119,9 +125,9 @@ const DropdownSelect = forwardRef<HTMLButtonElement, {
 
   const selectedLabels = useMemo(() => {
     return selectedValues
-      .map((v) => options.find((o) => o.value === v)?.label)
+      .map((v) => safeOptions.find((o) => o.value === v)?.label)
       .filter(Boolean) as string[];
-  }, [selectedValues, options]);
+  }, [selectedValues, safeOptions]);
 
   const handleSelect = useCallback((selectedValue: string) => {
     if (multiple) {
@@ -191,7 +197,7 @@ const DropdownSelect = forwardRef<HTMLButtonElement, {
         <Command
           filter={(itemValue, search) => {
             if (!search) return 1;
-            const option = options.find((o) => o.value === itemValue);
+            const option = safeOptions.find((o) => o.value === itemValue);
             const label = (option?.label || option?.value || "").toLowerCase();
             if (label.includes(search.toLowerCase())) return 1;
             return 0;
@@ -201,7 +207,7 @@ const DropdownSelect = forwardRef<HTMLButtonElement, {
           <CommandList>
             <CommandEmpty>검색 결과가 없습니다.</CommandEmpty>
             <CommandGroup>
-              {options.map((option) => {
+              {safeOptions.map((option) => {
                 const displayLabel = option.label || option.value || "(빈 값)";
                 return (
                   <CommandItem
@@ -869,7 +875,11 @@ export const V2Select = forwardRef<HTMLDivElement, V2SelectProps>(
             }
           }
 
-          setOptions(fetchedOptions);
+          // null/undefined value 필터링 (cmdk 크래시 방지)
+          const sanitized = fetchedOptions.filter(
+            (o) => o.value != null && String(o.value) !== ""
+          ).map((o) => ({ ...o, value: String(o.value), label: o.label || String(o.value) }));
+          setOptions(sanitized);
           setOptionsLoaded(true);
         } catch (error) {
           console.error("옵션 로딩 실패:", error);