feat(repeater-table): 행 드래그 앤 드롭 및 컬럼 너비 관리 기능 추가

- @dnd-kit 라이브러리로 행 순서 드래그 앤 드롭 구현
- SortableRow 컴포넌트로 드래그 가능한 테이블 행 구현
- GripVertical 아이콘 드래그 핸들 추가
- 드래그 시 선택된 행 인덱스 자동 재계산
- "균등 분배" 버튼으로 컬럼 너비 컨테이너에 맞게 균등 분배
- 컬럼 헤더 더블클릭으로 데이터 기준 자동 확장/복구 토글
- Input 컴포넌트 min-w-0 w-full 적용으로 컬럼 너비 초과 방지

frontend/lib/registry/components/modal-repeater-table/ModalRepeaterTableComponent.tsx

@@ -2,7 +2,7 @@
 
 import React, { useState, useEffect } from "react";
 import { Button } from "@/components/ui/button";
-import { Plus } from "lucide-react";
+import { Plus, Columns } from "lucide-react";
 import { ItemSelectionModal } from "./ItemSelectionModal";
 import { RepeaterTable } from "./RepeaterTable";
 import { ModalRepeaterTableProps, RepeaterColumnConfig, JoinCondition, DynamicDataSourceOption } from "./types";
@@ -331,6 +331,9 @@ export function ModalRepeaterTableComponent({
   // 체크박스 선택 상태
   const [selectedRows, setSelectedRows] = useState<Set<number>>(new Set());
 
+  // 균등 분배 트리거 (값이 변경되면 RepeaterTable에서 균등 분배 실행)
+  const [equalizeWidthsTrigger, setEqualizeWidthsTrigger] = useState(0);
+
   // 🆕 납기일 일괄 적용 플래그 (딱 한 번만 실행)
   const [isDeliveryDateApplied, setIsDeliveryDateApplied] = useState(false);
   
@@ -820,9 +823,23 @@ export function ModalRepeaterTableComponent({
     <div className={cn("space-y-4", className)}>
       {/* 추가 버튼 */}
       <div className="flex justify-between items-center">
-        <div className="text-sm text-muted-foreground">
+        <div className="flex items-center gap-2">
-          {localValue.length > 0 && `${localValue.length}개 항목`}
+          <span className="text-sm text-muted-foreground">
-          {selectedRows.size > 0 && ` (${selectedRows.size}개 선택됨)`}
+            {localValue.length > 0 && `${localValue.length}개 항목`}
+            {selectedRows.size > 0 && ` (${selectedRows.size}개 선택됨)`}
+          </span>
+          {columns.length > 0 && (
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={() => setEqualizeWidthsTrigger((prev) => prev + 1)}
+              className="h-7 text-xs px-2"
+              title="컬럼 너비 균등 분배"
+            >
+              <Columns className="h-3.5 w-3.5 mr-1" />
+              균등 분배
+            </Button>
+          )}
         </div>
         <div className="flex gap-2">
           {selectedRows.size > 0 && (
@@ -855,6 +872,7 @@ export function ModalRepeaterTableComponent({
         onDataSourceChange={handleDataSourceChange}
         selectedRows={selectedRows}
         onSelectionChange={setSelectedRows}
+        equalizeWidthsTrigger={equalizeWidthsTrigger}
       />
 
       {/* 항목 선택 모달 */}

frontend/lib/registry/components/modal-repeater-table/RepeaterTable.tsx

@@ -1,14 +1,68 @@
 "use client";
 
-import React, { useState, useEffect } from "react";
+import React, { useState, useEffect, useRef } from "react";
 import { Input } from "@/components/ui/input";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
-import { ChevronDown, Check } from "lucide-react";
+import { ChevronDown, Check, GripVertical } from "lucide-react";
 import { Checkbox } from "@/components/ui/checkbox";
 import { RepeaterColumnConfig } from "./types";
 import { cn } from "@/lib/utils";
 
+// @dnd-kit imports
+import {
+  DndContext,
+  closestCenter,
+  KeyboardSensor,
+  PointerSensor,
+  useSensor,
+  useSensors,
+  DragEndEvent,
+} from "@dnd-kit/core";
+import {
+  SortableContext,
+  sortableKeyboardCoordinates,
+  verticalListSortingStrategy,
+  useSortable,
+  arrayMove,
+} from "@dnd-kit/sortable";
+import { CSS } from "@dnd-kit/utilities";
+
+// SortableRow 컴포넌트 - 드래그 가능한 테이블 행
+interface SortableRowProps {
+  id: string;
+  children: (props: { 
+    attributes: React.HTMLAttributes<HTMLElement>; 
+    listeners: React.HTMLAttributes<HTMLElement> | undefined;
+    isDragging: boolean;
+  }) => React.ReactNode;
+  className?: string;
+}
+
+function SortableRow({ id, children, className }: SortableRowProps) {
+  const {
+    attributes,
+    listeners,
+    setNodeRef,
+    transform,
+    transition,
+    isDragging,
+  } = useSortable({ id });
+
+  const style: React.CSSProperties = {
+    transform: CSS.Transform.toString(transform),
+    transition,
+    opacity: isDragging ? 0.5 : 1,
+    backgroundColor: isDragging ? "#f0f9ff" : undefined,
+  };
+
+  return (
+    <tr ref={setNodeRef} style={style} className={className}>
+      {children({ attributes, listeners, isDragging })}
+    </tr>
+  );
+}
+
 interface RepeaterTableProps {
   columns: RepeaterColumnConfig[];
   data: any[];
@@ -21,6 +75,8 @@ interface RepeaterTableProps {
   // 체크박스 선택 관련
   selectedRows: Set<number>; // 선택된 행 인덱스
   onSelectionChange: (selectedRows: Set<number>) => void; // 선택 변경 콜백
+  // 균등 분배 트리거
+  equalizeWidthsTrigger?: number; // 값이 변경되면 균등 분배 실행
 }
 
 export function RepeaterTable({
@@ -33,7 +89,58 @@ export function RepeaterTable({
   onDataSourceChange,
   selectedRows,
   onSelectionChange,
+  equalizeWidthsTrigger,
 }: RepeaterTableProps) {
+  // 컨테이너 ref - 실제 너비 측정용
+  const containerRef = useRef<HTMLDivElement>(null);
+  
+  // 균등 분배 모드 상태 (true일 때 테이블이 컨테이너에 맞춤)
+  const [isEqualizedMode, setIsEqualizedMode] = useState(false);
+
+  // DnD 센서 설정
+  const sensors = useSensors(
+    useSensor(PointerSensor, {
+      activationConstraint: {
+        distance: 8, // 8px 이동해야 드래그 시작 (클릭과 구분)
+      },
+    }),
+    useSensor(KeyboardSensor, {
+      coordinateGetter: sortableKeyboardCoordinates,
+    })
+  );
+
+  // 드래그 종료 핸들러
+  const handleDragEnd = (event: DragEndEvent) => {
+    const { active, over } = event;
+
+    if (over && active.id !== over.id) {
+      const oldIndex = data.findIndex((_, idx) => `row-${idx}` === active.id);
+      const newIndex = data.findIndex((_, idx) => `row-${idx}` === over.id);
+
+      if (oldIndex !== -1 && newIndex !== -1) {
+        const newData = arrayMove(data, oldIndex, newIndex);
+        onDataChange(newData);
+
+        // 선택된 행 인덱스도 업데이트
+        if (selectedRows.size > 0) {
+          const newSelectedRows = new Set<number>();
+          selectedRows.forEach((oldIdx) => {
+            if (oldIdx === oldIndex) {
+              newSelectedRows.add(newIndex);
+            } else if (oldIdx > oldIndex && oldIdx <= newIndex) {
+              newSelectedRows.add(oldIdx - 1);
+            } else if (oldIdx < oldIndex && oldIdx >= newIndex) {
+              newSelectedRows.add(oldIdx + 1);
+            } else {
+              newSelectedRows.add(oldIdx);
+            }
+          });
+          onSelectionChange(newSelectedRows);
+        }
+      }
+    }
+  };
+  
   const [editingCell, setEditingCell] = useState<{
     rowIndex: number;
     field: string;
@@ -71,15 +178,100 @@ export function RepeaterTable({
       startX: e.clientX,
       startWidth: columnWidths[field] || 120,
     });
+    // 수동 조정 시 균등 분배 모드 해제
+    setIsEqualizedMode(false);
   };
   
-  // 더블클릭으로 기본 너비로 리셋
+  // 컬럼 확장 상태 추적 (토글용)
-  const handleDoubleClick = (field: string) => {
+  const [expandedColumns, setExpandedColumns] = useState<Set<string>>(new Set());
-    setColumnWidths((prev) => ({
+
-      ...prev,
+  // 데이터 기준 최적 너비 계산
-      [field]: defaultWidths[field] || 120,
+  const calculateAutoFitWidth = (field: string): number => {
-    }));
+    const column = columns.find(col => col.field === field);
+    if (!column) return 120;
+
+    // 헤더 텍스트 길이 (대략 8px per character + padding)
+    const headerWidth = (column.label?.length || field.length) * 8 + 40;
+
+    // 데이터 중 가장 긴 텍스트 찾기
+    let maxDataWidth = 0;
+    data.forEach(row => {
+      const value = row[field];
+      if (value !== undefined && value !== null) {
+        let displayText = String(value);
+        
+        // 숫자는 천단위 구분자 포함
+        if (typeof value === 'number') {
+          displayText = value.toLocaleString();
+        }
+        // 날짜는 yyyy-mm-dd 형식
+        if (column.type === 'date' && displayText.includes('T')) {
+          displayText = displayText.split('T')[0];
+        }
+        
+        // 대략적인 너비 계산 (8px per character + padding)
+        const textWidth = displayText.length * 8 + 32;
+        maxDataWidth = Math.max(maxDataWidth, textWidth);
+      }
+    });
+
+    // 헤더와 데이터 중 큰 값 사용, 최소 60px, 최대 400px
+    const optimalWidth = Math.max(headerWidth, maxDataWidth);
+    return Math.min(Math.max(optimalWidth, 60), 400);
   };
+
+  // 더블클릭으로 auto-fit / 기본 너비 토글
+  const handleDoubleClick = (field: string) => {
+    // 개별 컬럼 조정 시 균등 분배 모드 해제
+    setIsEqualizedMode(false);
+    
+    setExpandedColumns(prev => {
+      const newSet = new Set(prev);
+      if (newSet.has(field)) {
+        // 확장 상태 → 기본 너비로 복구
+        newSet.delete(field);
+        setColumnWidths(prevWidths => ({
+          ...prevWidths,
+          [field]: defaultWidths[field] || 120,
+        }));
+      } else {
+        // 기본 상태 → 데이터 기준 auto-fit
+        newSet.add(field);
+        const autoWidth = calculateAutoFitWidth(field);
+        setColumnWidths(prevWidths => ({
+          ...prevWidths,
+          [field]: autoWidth,
+        }));
+      }
+      return newSet;
+    });
+  };
+
+  // 균등 분배 트리거 감지
+  useEffect(() => {
+    if (equalizeWidthsTrigger === undefined || equalizeWidthsTrigger === 0) return;
+    if (!containerRef.current) return;
+    
+    // 실제 컨테이너 너비 측정
+    const containerWidth = containerRef.current.offsetWidth;
+    
+    // 체크박스 컬럼 너비(40px) + 테이블 border(2px) 제외한 가용 너비 계산
+    const checkboxColumnWidth = 40;
+    const borderWidth = 2;
+    const availableWidth = containerWidth - checkboxColumnWidth - borderWidth;
+    
+    // 컬럼 수로 나눠서 균등 분배 (최소 60px 보장)
+    const equalWidth = Math.max(60, Math.floor(availableWidth / columns.length));
+    
+    const newWidths: Record<string, number> = {};
+    columns.forEach((col) => {
+      newWidths[col.field] = equalWidth;
+    });
+    
+    setColumnWidths(newWidths);
+    setExpandedColumns(new Set()); // 확장 상태 초기화
+    setIsEqualizedMode(true); // 균등 분배 모드 활성화
+  }, [equalizeWidthsTrigger, columns]);
   
   useEffect(() => {
     if (!resizing) return;
@@ -176,7 +368,7 @@ export function RepeaterTable({
             onChange={(e) =>
               handleCellEdit(rowIndex, column.field, parseFloat(e.target.value) || 0)
             }
-            className="h-8 text-xs border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 rounded-none"
+            className="h-8 text-xs border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 rounded-none min-w-0 w-full"
           />
         );
 
@@ -204,7 +396,7 @@ export function RepeaterTable({
             type="date"
             value={formatDateValue(value)}
             onChange={(e) => handleCellEdit(rowIndex, column.field, e.target.value)}
-            className="h-8 text-xs border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 rounded-none"
+            className="h-8 text-xs border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 rounded-none min-w-0 w-full"
           />
         );
 
@@ -216,7 +408,7 @@ export function RepeaterTable({
               handleCellEdit(rowIndex, column.field, newValue)
             }
           >
-            <SelectTrigger className="h-8 text-xs border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 rounded-none">
+            <SelectTrigger className="h-8 text-xs border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 rounded-none min-w-0 w-full">
               <SelectValue />
             </SelectTrigger>
             <SelectContent>
@@ -235,30 +427,49 @@ export function RepeaterTable({
             type="text"
             value={value || ""}
             onChange={(e) => handleCellEdit(rowIndex, column.field, e.target.value)}
-            className="h-8 text-xs border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 rounded-none"
+            className="h-8 text-xs border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 rounded-none min-w-0 w-full"
           />
         );
     }
   };
 
+  // 드래그 아이템 ID 목록
+  const sortableItems = data.map((_, idx) => `row-${idx}`);
+
   return (
-    <div className="border border-gray-200 bg-white">
+    <DndContext
-      <div className="overflow-x-auto max-h-[400px] overflow-y-auto">
+      sensors={sensors}
-        <table className="w-full text-xs border-collapse">
+      collisionDetection={closestCenter}
-          <thead className="bg-gray-50 sticky top-0 z-10">
+      onDragEnd={handleDragEnd}
-            <tr>
+    >
-              <th className="px-3 py-2 text-center font-medium text-gray-700 border-b border-r border-gray-200 w-10">
+      <div ref={containerRef} className="border border-gray-200 bg-white">
-                <Checkbox
+        <div className="overflow-x-auto max-h-[400px] overflow-y-auto">
-                  checked={isAllSelected}
+          <table 
-                  // @ts-ignore - indeterminate는 HTML 속성
+            className={cn(
-                  data-indeterminate={isIndeterminate}
+              "text-xs border-collapse",
-                  onCheckedChange={handleSelectAll}
+              isEqualizedMode && "w-full"
-                  className={cn(
+            )}
-                    "border-gray-400",
+            style={isEqualizedMode ? undefined : { minWidth: "max-content" }}
-                    isIndeterminate && "data-[state=checked]:bg-primary"
+          >
-                  )}
+            <thead className="bg-gray-50 sticky top-0 z-10">
-                />
+              <tr>
-              </th>
+                {/* 드래그 핸들 헤더 */}
+                <th className="px-1 py-2 text-center font-medium text-gray-700 border-b border-r border-gray-200 w-8">
+                  <span className="sr-only">순서</span>
+                </th>
+                {/* 체크박스 헤더 */}
+                <th className="px-3 py-2 text-center font-medium text-gray-700 border-b border-r border-gray-200 w-10">
+                  <Checkbox
+                    checked={isAllSelected}
+                    // @ts-ignore - indeterminate는 HTML 속성
+                    data-indeterminate={isIndeterminate}
+                    onCheckedChange={handleSelectAll}
+                    className={cn(
+                      "border-gray-400",
+                      isIndeterminate && "data-[state=checked]:bg-primary"
+                    )}
+                  />
+                </th>
               {columns.map((col) => {
                 const hasDynamicSource = col.dynamicDataSource?.enabled && col.dynamicDataSource.options.length > 0;
                 const activeOptionId = activeDataSources[col.field] || col.dynamicDataSource?.defaultOptionId;
@@ -266,13 +477,15 @@ export function RepeaterTable({
                   ? col.dynamicDataSource!.options.find(opt => opt.id === activeOptionId) || col.dynamicDataSource!.options[0]
                   : null;
                 
+                const isExpanded = expandedColumns.has(col.field);
+                
                 return (
                 <th
                   key={col.field}
                   className="px-3 py-2 text-left font-medium text-gray-700 border-b border-r border-gray-200 relative group cursor-pointer select-none"
                   style={{ width: `${columnWidths[col.field]}px` }}
                   onDoubleClick={() => handleDoubleClick(col.field)}
-                  title="더블클릭하여 기본 너비로 되돌리기"
+                  title={isExpanded ? "더블클릭하여 기본 너비로 복구" : "더블클릭하여 내용에 맞게 확장"}
                 >
                     <div className="flex items-center justify-between pointer-events-none">
                       <div className="flex items-center gap-1 pointer-events-auto">
@@ -344,46 +557,74 @@ export function RepeaterTable({
                   </th>
                 );
               })}
-            </tr>
-          </thead>
-          <tbody className="bg-white">
-            {data.length === 0 ? (
-              <tr>
-                <td
-                  colSpan={columns.length + 1}
-                  className="px-4 py-8 text-center text-gray-500 border-b border-gray-200"
-                >
-                  추가된 항목이 없습니다
-                </td>
               </tr>
-            ) : (
+            </thead>
-              data.map((row, rowIndex) => (
+            <SortableContext items={sortableItems} strategy={verticalListSortingStrategy}>
-                <tr 
+              <tbody className="bg-white">
-                  key={rowIndex} 
+                {data.length === 0 ? (
-                  className={cn(
+                  <tr>
-                    "hover:bg-blue-50/50 transition-colors",
+                    <td
-                    selectedRows.has(rowIndex) && "bg-blue-50"
+                      colSpan={columns.length + 2}
-                  )}
+                      className="px-4 py-8 text-center text-gray-500 border-b border-gray-200"
-                >
+                    >
-                  <td className="px-3 py-1 text-center border-b border-r border-gray-200">
+                      추가된 항목이 없습니다
-                    <Checkbox
-                      checked={selectedRows.has(rowIndex)}
-                      onCheckedChange={(checked) => handleRowSelect(rowIndex, !!checked)}
-                      className="border-gray-400"
-                    />
-                  </td>
-                  {columns.map((col) => (
-                    <td key={col.field} className="px-1 py-1 border-b border-r border-gray-200">
-                      {renderCell(row, col, rowIndex)}
                     </td>
-                  ))}
+                  </tr>
-                </tr>
+                ) : (
-              ))
+                  data.map((row, rowIndex) => (
-            )}
+                    <SortableRow
-          </tbody>
+                      key={`row-${rowIndex}`}
-        </table>
+                      id={`row-${rowIndex}`}
+                      className={cn(
+                        "hover:bg-blue-50/50 transition-colors",
+                        selectedRows.has(rowIndex) && "bg-blue-50"
+                      )}
+                    >
+                      {({ attributes, listeners, isDragging }) => (
+                        <>
+                          {/* 드래그 핸들 */}
+                          <td className="px-1 py-1 text-center border-b border-r border-gray-200">
+                            <button
+                              type="button"
+                              className={cn(
+                                "cursor-grab p-1 rounded hover:bg-gray-100 transition-colors",
+                                isDragging && "cursor-grabbing"
+                              )}
+                              {...attributes}
+                              {...listeners}
+                            >
+                              <GripVertical className="h-4 w-4 text-gray-400" />
+                            </button>
+                          </td>
+                          {/* 체크박스 */}
+                          <td className="px-3 py-1 text-center border-b border-r border-gray-200">
+                            <Checkbox
+                              checked={selectedRows.has(rowIndex)}
+                              onCheckedChange={(checked) => handleRowSelect(rowIndex, !!checked)}
+                              className="border-gray-400"
+                            />
+                          </td>
+                          {/* 데이터 컬럼들 */}
+                          {columns.map((col) => (
+                            <td 
+                              key={col.field} 
+                              className="px-1 py-1 border-b border-r border-gray-200 overflow-hidden"
+                              style={{ width: `${columnWidths[col.field]}px`, maxWidth: `${columnWidths[col.field]}px` }}
+                            >
+                              {renderCell(row, col, rowIndex)}
+                            </td>
+                          ))}
+                        </>
+                      )}
+                    </SortableRow>
+                  ))
+                )}
+              </tbody>
+            </SortableContext>
+          </table>
+        </div>
       </div>
-    </div>
+    </DndContext>
   );
 }