refactor(universal-form-modal): ConfigPanel 모달 분리 및 설정 패널 오버플로우 수정

- UniversalFormModalConfigPanel을 3개 모달로 분리 (2300줄 → 300줄)
  - FieldDetailSettingsModal: 필드 상세 설정
  - SaveSettingsModal: 저장 설정
  - SectionLayoutModal: 섹션 레이아웃 설정
- FloatingPanel, DetailSettingsPanel 가로 스크롤 오버플로우 수정
- SelectOptionConfig에 saveColumn 필드 추가 (저장 값 별도 지정)

frontend/components/screen/panels/DetailSettingsPanel.tsx

@@ -878,7 +878,7 @@ export const DetailSettingsPanel: React.FC<DetailSettingsPanelProps> = ({
         };
 
         return (
-          <div className="space-y-4" key={selectedComponent.id}>
+          <div className="space-y-4 w-full min-w-0" key={selectedComponent.id}>
             <div className="flex items-center gap-2 border-b pb-2">
               <Settings className="h-4 w-4 text-primary" />
               <h3 className="text-sm font-semibold">{definition.name} 설정</h3>
@@ -998,7 +998,7 @@ export const DetailSettingsPanel: React.FC<DetailSettingsPanelProps> = ({
         </div>
 
         {/* 설정 패널 영역 */}
-        <div className="flex-1 overflow-y-auto p-4">{renderComponentConfigPanel()}</div>
+        <div className="flex-1 overflow-y-auto overflow-x-hidden p-4 w-full">{renderComponentConfigPanel()}</div>
       </div>
     );
   }
@@ -1156,8 +1156,8 @@ export const DetailSettingsPanel: React.FC<DetailSettingsPanelProps> = ({
         </div>
 
         {/* 컴포넌트 설정 패널 */}
-        <div className="flex-1 overflow-y-auto px-6 pb-6">
-          <div className="space-y-6">
+        <div className="flex-1 overflow-y-auto overflow-x-hidden px-6 pb-6 w-full min-w-0">
+          <div className="space-y-6 w-full min-w-0">
             {/* DynamicComponentConfigPanel */}
             <DynamicComponentConfigPanel
               componentId={componentId}
@@ -1396,8 +1396,8 @@ export const DetailSettingsPanel: React.FC<DetailSettingsPanelProps> = ({
       </div>
 
       {/* 상세 설정 영역 */}
-      <div className="flex-1 overflow-y-auto p-4">
-        <div className="space-y-6">
+      <div className="flex-1 overflow-y-auto overflow-x-hidden p-4 w-full min-w-0">
+        <div className="space-y-6 w-full min-w-0">
           {console.log("🔍 [DetailSettingsPanel] widget 타입:", selectedComponent?.type, "autoFill:", widget.autoFill)}
           {/* 🆕 자동 입력 섹션 */}
           <div className="space-y-4 rounded-md border border-red-500 bg-yellow-50 p-4">