feat(pop): 설정 패널 아코디언 접기/펼치기 일관성 + sessionStorage 상태 기억

설정 패널을 열 때 섹션이 일부는 펼쳐져 있고 일부는 접혀 있어
일관성이 없던 UX를 개선하고, 사용자가 펼친 섹션을 탭 세션 내에서 기억한다.
- useCollapsibleSections 커스텀 훅 생성 (sessionStorage 기반, 초기 모두 접힘)
- PopCardListConfig: CollapsibleSection에 sectionKey/sections prop 패턴 적용
- PopFieldConfig: SaveTabContent 5개 고정 섹션 훅 적용,
  SectionEditor 초기값 접힘으로 변경
- PopDashboardConfig: PageEditor 초기값 접힘으로 변경

frontend/hooks/pop/index.ts

@@ -26,5 +26,8 @@ export { useConnectionResolver } from "./useConnectionResolver";
 export { useCartSync } from "./useCartSync";
 export type { UseCartSyncReturn } from "./useCartSync";
 
+// 설정 패널 접기/펼치기 상태 관리
+export { useCollapsibleSections } from "./useCollapsibleSections";
+
 // SQL 빌더 유틸 (고급 사용 시)
 export { buildAggregationSQL, validateDataSourceConfig } from "./popSqlBuilder";

frontend/hooks/pop/useCollapsibleSections.ts

@@ -0,0 +1,58 @@
+import { useState, useCallback, useRef } from "react";
+
+/**
+ * 설정 패널 접기/펼치기 상태를 sessionStorage로 기억하는 훅
+ *
+ * - 초기 상태: 모든 섹션 접힘
+ * - 사용자가 펼친 섹션은 같은 탭 세션 내에서 기억
+ * - 탭 닫으면 초기화
+ *
+ * @param storageKey sessionStorage 키 (예: "pop-card-list")
+ */
+export function useCollapsibleSections(storageKey: string) {
+  const fullKey = `pop-config-sections-${storageKey}`;
+
+  const [openSections, setOpenSections] = useState<Set<string>>(() => {
+    if (typeof window === "undefined") return new Set<string>();
+    try {
+      const saved = sessionStorage.getItem(fullKey);
+      if (saved) return new Set<string>(JSON.parse(saved));
+    } catch {}
+    return new Set<string>();
+  });
+
+  const openSectionsRef = useRef(openSections);
+  openSectionsRef.current = openSections;
+
+  const persist = useCallback(
+    (next: Set<string>) => {
+      try {
+        sessionStorage.setItem(fullKey, JSON.stringify([...next]));
+      } catch {}
+    },
+    [fullKey],
+  );
+
+  const isOpen = useCallback(
+    (key: string) => openSectionsRef.current.has(key),
+    [],
+  );
+
+  const toggle = useCallback(
+    (key: string) => {
+      setOpenSections((prev) => {
+        const next = new Set(prev);
+        if (next.has(key)) {
+          next.delete(key);
+        } else {
+          next.add(key);
+        }
+        persist(next);
+        return next;
+      });
+    },
+    [persist],
+  );
+
+  return { isOpen, toggle };
+}

frontend/lib/registry/pop-components/pop-card-list/PopCardListConfig.tsx

@@ -10,6 +10,7 @@
 
 import React, { useState, useEffect, useMemo } from "react";
 import { ChevronDown, ChevronRight, Plus, Trash2, Database, Check } from "lucide-react";
+import { useCollapsibleSections } from "@/hooks/pop/useCollapsibleSections";
 import type { GridMode } from "@/components/pop/designer/types/pop-layout";
 import { GRID_BREAKPOINTS } from "@/components/pop/designer/types/pop-layout";
 import { Button } from "@/components/ui/button";
@@ -135,6 +136,7 @@ const COLOR_OPTIONS = [
 
 export function PopCardListConfigPanel({ config, onUpdate, currentMode, currentColSpan }: ConfigPanelProps) {
   const [activeTab, setActiveTab] = useState<"basic" | "template">("basic");
+  const sections = useCollapsibleSections("pop-card-list");
 
   const cfg: PopCardListConfig = config || DEFAULT_CONFIG;
 
@@ -184,6 +186,7 @@ export function PopCardListConfigPanel({ config, onUpdate, currentMode, currentC
             onUpdate={updateConfig}
             currentMode={currentMode}
             currentColSpan={currentColSpan}
+            sections={sections}
           />
         )}
         {activeTab === "template" && (
@@ -195,7 +198,7 @@ export function PopCardListConfigPanel({ config, onUpdate, currentMode, currentC
               </div>
             </div>
           ) : (
-            <CardTemplateTab config={cfg} onUpdate={updateConfig} />
+            <CardTemplateTab config={cfg} onUpdate={updateConfig} sections={sections} />
           )
         )}
       </div>
@@ -205,16 +208,20 @@ export function PopCardListConfigPanel({ config, onUpdate, currentMode, currentC
 
 // ===== 기본 설정 탭 (테이블 + 레이아웃 통합) =====
 
+type SectionsApi = { isOpen: (key: string) => boolean; toggle: (key: string) => void };
+
 function BasicSettingsTab({
   config,
   onUpdate,
   currentMode,
   currentColSpan,
+  sections,
 }: {
   config: PopCardListConfig;
   onUpdate: (partial: Partial<PopCardListConfig>) => void;
   currentMode?: GridMode;
   currentColSpan?: number;
+  sections: SectionsApi;
 }) {
   const dataSource = config.dataSource || DEFAULT_DATA_SOURCE;
   const [tables, setTables] = useState<TableInfo[]>([]);
@@ -321,7 +328,7 @@ function BasicSettingsTab({
   return (
     <div className="space-y-4">
       {/* 장바구니 목록 모드 */}
-      <CollapsibleSection title="장바구니 목록 모드" defaultOpen={isCartListMode}>
+      <CollapsibleSection sectionKey="basic-cart-mode" title="장바구니 목록 모드" sections={sections}>
         <CartListModeSection
           cartListMode={config.cartListMode}
           onUpdate={(cartListMode) => onUpdate({ cartListMode })}
@@ -330,7 +337,7 @@ function BasicSettingsTab({
 
       {/* 테이블 선택 (장바구니 모드 시 숨김) */}
       {!isCartListMode && (
-        <CollapsibleSection title="테이블 선택" defaultOpen>
+        <CollapsibleSection sectionKey="basic-table" title="테이블 선택" sections={sections}>
           <div className="space-y-3">
             <div>
               <Label className="text-[10px] text-muted-foreground">데이터 테이블</Label>
@@ -365,7 +372,9 @@ function BasicSettingsTab({
       {/* 조인 설정 (장바구니 모드 시 숨김) */}
       {!isCartListMode && dataSource.tableName && (
         <CollapsibleSection
+          sectionKey="basic-join"
           title="조인 설정"
+          sections={sections}
           badge={
             dataSource.joins && dataSource.joins.length > 0
               ? `${dataSource.joins.length}개`
@@ -383,7 +392,9 @@ function BasicSettingsTab({
       {/* 정렬 기준 (장바구니 모드 시 숨김) */}
       {!isCartListMode && dataSource.tableName && (
         <CollapsibleSection
+          sectionKey="basic-sort"
           title="정렬 기준"
+          sections={sections}
           badge={
             dataSource.sort
               ? Array.isArray(dataSource.sort)
@@ -403,7 +414,9 @@ function BasicSettingsTab({
       {/* 필터 기준 (장바구니 모드 시 숨김) */}
       {!isCartListMode && dataSource.tableName && (
         <CollapsibleSection
+          sectionKey="basic-filter"
           title="필터 기준"
+          sections={sections}
           badge={
             dataSource.filters && dataSource.filters.length > 0
               ? `${dataSource.filters.length}개`
@@ -421,7 +434,9 @@ function BasicSettingsTab({
       {/* 저장 매핑 (장바구니 모드일 때만) */}
       {isCartListMode && (
         <CollapsibleSection
+          sectionKey="basic-save-mapping"
           title="저장 매핑"
+          sections={sections}
           badge={
             config.saveMapping?.mappings && config.saveMapping.mappings.length > 0
               ? `${config.saveMapping.mappings.length}개`
@@ -437,7 +452,7 @@ function BasicSettingsTab({
       )}
 
       {/* 레이아웃 설정 */}
-      <CollapsibleSection title="레이아웃 설정" defaultOpen>
+      <CollapsibleSection sectionKey="basic-layout" title="레이아웃 설정" sections={sections}>
         <div className="space-y-3">
           {modeLabel && (
             <div className="flex items-center gap-1.5 rounded-md bg-muted/50 px-2.5 py-1.5">
@@ -526,9 +541,11 @@ function BasicSettingsTab({
 function CardTemplateTab({
   config,
   onUpdate,
+  sections,
 }: {
   config: PopCardListConfig;
   onUpdate: (partial: Partial<PopCardListConfig>) => void;
+  sections: SectionsApi;
 }) {
   const dataSource = config.dataSource || DEFAULT_DATA_SOURCE;
   const template = config.cardTemplate || DEFAULT_TEMPLATE;
@@ -634,7 +651,7 @@ function CardTemplateTab({
   return (
     <div className="space-y-4">
       {/* 헤더 설정 */}
-      <CollapsibleSection title="헤더 설정" defaultOpen>
+      <CollapsibleSection sectionKey="tpl-header" title="헤더 설정" sections={sections}>
         <HeaderSettingsSection
           header={template.header || DEFAULT_HEADER}
           columnGroups={columnGroups}
@@ -643,7 +660,7 @@ function CardTemplateTab({
       </CollapsibleSection>
 
       {/* 이미지 설정 */}
-      <CollapsibleSection title="이미지 설정" defaultOpen>
+      <CollapsibleSection sectionKey="tpl-image" title="이미지 설정" sections={sections}>
         <ImageSettingsSection
           image={template.image || DEFAULT_IMAGE}
           columnGroups={columnGroups}
@@ -653,9 +670,10 @@ function CardTemplateTab({
 
       {/* 본문 필드 */}
       <CollapsibleSection
+        sectionKey="tpl-body"
         title="본문 필드"
+        sections={sections}
         badge={`${template.body?.fields?.length || 0}개`}
-        defaultOpen
       >
         <BodyFieldsSection
           body={template.body || DEFAULT_BODY}
@@ -665,7 +683,7 @@ function CardTemplateTab({
       </CollapsibleSection>
 
       {/* 입력 필드 설정 */}
-      <CollapsibleSection title="입력 필드" defaultOpen={false}>
+      <CollapsibleSection sectionKey="tpl-input" title="입력 필드" sections={sections}>
         <InputFieldSettingsSection
           inputField={config.inputField}
           columns={columns}
@@ -675,7 +693,7 @@ function CardTemplateTab({
       </CollapsibleSection>
 
       {/* 포장등록 설정 */}
-      <CollapsibleSection title="포장등록 (계산기)" defaultOpen={false}>
+      <CollapsibleSection sectionKey="tpl-package" title="포장등록 (계산기)" sections={sections}>
         <PackageSettingsSection
           packageConfig={config.packageConfig}
           onUpdate={(packageConfig) => onUpdate({ packageConfig })}
@@ -683,7 +701,7 @@ function CardTemplateTab({
       </CollapsibleSection>
 
       {/* 담기 버튼 설정 */}
-      <CollapsibleSection title="담기 버튼" defaultOpen={false}>
+      <CollapsibleSection sectionKey="tpl-cart" title="담기 버튼" sections={sections}>
         <CartActionSettingsSection
           cartAction={config.cartAction}
           onUpdate={(cartAction) => onUpdate({ cartAction })}
@@ -693,7 +711,7 @@ function CardTemplateTab({
       </CollapsibleSection>
 
       {/* 반응형 표시 설정 */}
-      <CollapsibleSection title="반응형 표시" defaultOpen={false}>
+      <CollapsibleSection sectionKey="tpl-responsive" title="반응형 표시" sections={sections}>
         <ResponsiveDisplaySection
           config={config}
           onUpdate={onUpdate}
@@ -769,24 +787,26 @@ function GroupedColumnSelect({
 // ===== 접기/펴기 섹션 컴포넌트 =====
 
 function CollapsibleSection({
+  sectionKey,
   title,
   badge,
-  defaultOpen = false,
+  sections,
   children,
 }: {
+  sectionKey: string;
   title: string;
   badge?: string;
-  defaultOpen?: boolean;
+  sections: SectionsApi;
   children: React.ReactNode;
 }) {
-  const [open, setOpen] = useState(defaultOpen);
+  const open = sections.isOpen(sectionKey);
 
   return (
     <div className="rounded-md border">
       <button
         type="button"
         className="flex w-full items-center justify-between px-3 py-2 text-left transition-colors hover:bg-muted/50"
-        onClick={() => setOpen(!open)}
+        onClick={() => sections.toggle(sectionKey)}
       >
         <div className="flex items-center gap-2">
           {open ? (

frontend/lib/registry/pop-components/pop-dashboard/PopDashboardConfig.tsx

@@ -1937,7 +1937,7 @@ function PageEditor({
   isPreviewing?: boolean;
   onUpdateItem?: (updatedItem: DashboardItem) => void;
 }) {
-  const [expanded, setExpanded] = useState(true);
+  const [expanded, setExpanded] = useState(false);
 
   return (
     <div className="rounded-md border p-2">

frontend/lib/registry/pop-components/pop-field/PopFieldConfig.tsx

@@ -9,6 +9,7 @@
  */
 
 import { useState, useEffect, useCallback, useMemo } from "react";
+import { useCollapsibleSections } from "@/hooks/pop/useCollapsibleSections";
 import {
   ChevronDown,
   ChevronRight,
@@ -648,10 +649,7 @@ function SaveTabContent({
 
   const noFields = allFields.length === 0;
 
-  const [collapsed, setCollapsed] = useState<Record<string, boolean>>({});
-  const toggleSection = useCallback((key: string) => {
-    setCollapsed((prev) => ({ ...prev, [key]: !prev[key] }));
-  }, []);
+  const sections = useCollapsibleSections("pop-field");
 
   return (
     <div className="space-y-4">
@@ -666,16 +664,16 @@ function SaveTabContent({
         <div className="rounded-md border bg-card">
           <div
             className="flex cursor-pointer items-center gap-1.5 px-3 py-2"
-            onClick={() => toggleSection("table")}
+            onClick={() => sections.toggle("table")}
           >
-            {collapsed["table"] ? (
-              <ChevronRight className="h-3 w-3 text-muted-foreground" />
-            ) : (
+            {sections.isOpen("table") ? (
               <ChevronDown className="h-3 w-3 text-muted-foreground" />
+            ) : (
+              <ChevronRight className="h-3 w-3 text-muted-foreground" />
             )}
             <span className="text-xs font-medium">테이블 설정</span>
           </div>
-          {!collapsed["table"] && <div className="space-y-3 border-t p-3">
+          {sections.isOpen("table") && <div className="space-y-3 border-t p-3">
             {/* 읽기 테이블 (display 섹션이 있을 때만) */}
             {hasDisplayFields && (
               <>
@@ -839,19 +837,19 @@ function SaveTabContent({
         <div className="rounded-md border bg-card">
           <div
             className="flex cursor-pointer items-center gap-1.5 px-3 py-2"
-            onClick={() => toggleSection("read")}
+            onClick={() => sections.toggle("read")}
           >
-            {collapsed["read"] ? (
-              <ChevronRight className="h-3 w-3 text-muted-foreground" />
-            ) : (
+            {sections.isOpen("read") ? (
               <ChevronDown className="h-3 w-3 text-muted-foreground" />
+            ) : (
+              <ChevronRight className="h-3 w-3 text-muted-foreground" />
             )}
             <span className="text-xs font-medium">읽기 필드</span>
             <span className="text-[10px] text-muted-foreground">
               (읽기 폼)
             </span>
           </div>
-          {!collapsed["read"] && <div className="space-y-2 border-t p-3">
+          {sections.isOpen("read") && <div className="space-y-2 border-t p-3">
             {readColumns.length === 0 ? (
               <p className="py-2 text-xs text-muted-foreground">
                 읽기 테이블의 컬럼을 불러오는 중...
@@ -988,19 +986,19 @@ function SaveTabContent({
         <div className="rounded-md border bg-card">
           <div
             className="flex cursor-pointer items-center gap-1.5 px-3 py-2"
-            onClick={() => toggleSection("input")}
+            onClick={() => sections.toggle("input")}
           >
-            {collapsed["input"] ? (
-              <ChevronRight className="h-3 w-3 text-muted-foreground" />
-            ) : (
+            {sections.isOpen("input") ? (
               <ChevronDown className="h-3 w-3 text-muted-foreground" />
+            ) : (
+              <ChevronRight className="h-3 w-3 text-muted-foreground" />
             )}
             <span className="text-xs font-medium">입력 필드</span>
             <span className="text-[10px] text-muted-foreground">
               (입력 폼 → 저장)
             </span>
           </div>
-          {!collapsed["input"] && <div className="space-y-2 border-t p-3">
+          {sections.isOpen("input") && <div className="space-y-2 border-t p-3">
             {saveColumns.length === 0 ? (
               <p className="py-2 text-xs text-muted-foreground">
                 저장 테이블의 컬럼을 불러오는 중...
@@ -1050,19 +1048,19 @@ function SaveTabContent({
         <div className="rounded-md border bg-card">
           <div
             className="flex cursor-pointer items-center gap-1.5 px-3 py-2"
-            onClick={() => toggleSection("hidden")}
+            onClick={() => sections.toggle("hidden")}
           >
-            {collapsed["hidden"] ? (
-              <ChevronRight className="h-3 w-3 text-muted-foreground" />
-            ) : (
+            {sections.isOpen("hidden") ? (
               <ChevronDown className="h-3 w-3 text-muted-foreground" />
+            ) : (
+              <ChevronRight className="h-3 w-3 text-muted-foreground" />
             )}
             <span className="text-xs font-medium">숨은 필드</span>
             <span className="text-[10px] text-muted-foreground">
               (UI 미표시, 전달 데이터에서 추출하여 저장)
             </span>
           </div>
-          {!collapsed["hidden"] && <div className="space-y-3 border-t p-3">
+          {sections.isOpen("hidden") && <div className="space-y-3 border-t p-3">
             {hiddenMappings.map((m) => {
               const isJson = m.valueSource === "json_extract";
               const isStatic = m.valueSource === "static";
@@ -1215,19 +1213,19 @@ function SaveTabContent({
         <div className="rounded-md border bg-card">
           <div
             className="flex cursor-pointer items-center gap-1.5 px-3 py-2"
-            onClick={() => toggleSection("autogen")}
+            onClick={() => sections.toggle("autogen")}
           >
-            {collapsed["autogen"] ? (
-              <ChevronRight className="h-3 w-3 text-muted-foreground" />
-            ) : (
+            {sections.isOpen("autogen") ? (
               <ChevronDown className="h-3 w-3 text-muted-foreground" />
+            ) : (
+              <ChevronRight className="h-3 w-3 text-muted-foreground" />
             )}
             <span className="text-xs font-medium">자동생성 필드</span>
             <span className="text-[10px] text-muted-foreground">
               (저장 시 서버에서 채번)
             </span>
           </div>
-          {!collapsed["autogen"] && <div className="space-y-3 border-t p-3">
+          {sections.isOpen("autogen") && <div className="space-y-3 border-t p-3">
             {autoGenMappings.map((m) => {
               const isLinked = !!m.linkedFieldId;
               return (
@@ -1396,7 +1394,7 @@ function SectionEditor({
   onMoveUp,
   allSections,
 }: SectionEditorProps) {
-  const [collapsed, setCollapsed] = useState(false);
+  const [collapsed, setCollapsed] = useState(true);
   const resolvedStyle = migrateStyle(section.style);
 
   const sectionFields = section.fields || [];