fix: SelectedItemsDetailInput Select 빈 값 에러 수정 및 inputType 디버깅 로그 추가

- Select 컴포넌트에서 빈 문자열 value를 가진 SelectItem 제거
- category/code 타입 필드의 옵션 로딩 디버깅 로그 추가
- 빈 값 필터링으로 'SelectItem must not have empty value' 에러 해결
- codeCategory 자동 감지 로직 디버깅 강화

frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputComponent.tsx

@@ -92,12 +92,22 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
   // 🆕 필드에 codeCategory가 있으면 자동으로 옵션 로드
   useEffect(() => {
     const loadCodeOptions = async () => {
+      console.log("🔄 [loadCodeOptions] 시작:", {
+        additionalFields: componentConfig.additionalFields,
+        targetTable: componentConfig.targetTable,
+      });
+
       // 🆕 code/category 타입 필드 + codeCategory가 있는 필드 모두 처리
       const codeFields = componentConfig.additionalFields?.filter(
         (field) => field.inputType === "code" || field.inputType === "category"
       );
       
-      if (!codeFields || codeFields.length === 0) return;
+      console.log("🔍 [loadCodeOptions] code/category 필드:", codeFields);
+      
+      if (!codeFields || codeFields.length === 0) {
+        console.log("⚠️ [loadCodeOptions] code/category 타입 필드가 없습니다");
+        return;
+      }
       
       const newOptions: Record<string, Array<{ label: string; value: string }>> = { ...codeOptions };
       
@@ -338,15 +348,17 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
             </SelectTrigger>
             <SelectContent>
               {categoryOptions && categoryOptions.length > 0 ? (
-                categoryOptions.map((option) => (
-                  <SelectItem key={option.value} value={option.value}>
-                    {option.label}
-                  </SelectItem>
-                ))
+                categoryOptions
+                  .filter((option) => option.value !== "")
+                  .map((option) => (
+                    <SelectItem key={option.value} value={option.value}>
+                      {option.label}
+                    </SelectItem>
+                  ))
               ) : (
-                <SelectItem value="" disabled>
+                <div className="py-6 text-center text-xs text-muted-foreground">
                   옵션 로딩 중...
-                </SelectItem>
+                </div>
               )}
             </SelectContent>
           </Select>
@@ -374,7 +386,7 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
               <SelectValue placeholder={field.placeholder || "선택하세요"} />
             </SelectTrigger>
             <SelectContent>
-              {field.options?.map((option) => (
+              {field.options?.filter((option) => option.value !== "").map((option) => (
                 <SelectItem key={option.value} value={option.value}>
                   {option.label}
                 </SelectItem>