feat(WEB): 견적 개소 복제 기능 추가 - 부호 자동 채번

- LocationListPanel에 복제 버튼(Copy 아이콘) 추가
- 복제 시 모든 개소 데이터(bomResult 포함) 복사
- 부호 자동 채번: 같은 접두어의 최대 번호 +1, 자릿수 유지

src/components/quotes/LocationListPanel.tsx

@@ -9,7 +9,7 @@
 "use client";
 
 import { useState, useCallback } from "react";
-import { Plus, Upload, Download, Pencil, Trash2 } from "lucide-react";
+import { Plus, Upload, Download, Pencil, Trash2, Copy } from "lucide-react";
 import { toast } from "sonner";
 
 import { Button } from "../ui/button";
@@ -77,6 +77,7 @@ interface LocationListPanelProps {
   onSelectLocation: (id: string) => void;
   onAddLocation: (location: Omit<LocationItem, "id">) => Promise<boolean>;
   onDeleteLocation: (id: string) => void;
+  onCloneLocation?: (id: string) => void;
   onUpdateLocation: (locationId: string, updates: Partial<LocationItem>) => void;
   onExcelUpload: (locations: Omit<LocationItem, "id">[]) => void;
   finishedGoods: FinishedGoods[];
@@ -94,6 +95,7 @@ export function LocationListPanel({
   onSelectLocation,
   onAddLocation,
   onDeleteLocation,
+  onCloneLocation,
   onUpdateLocation,
   onExcelUpload,
   finishedGoods,
@@ -523,6 +525,16 @@ export function LocationListPanel({
                         >
                           <Pencil className="h-4 w-4 text-gray-600" />
                         </button>
+                        <button
+                          onClick={(e) => {
+                            e.stopPropagation();
+                            onCloneLocation?.(loc.id);
+                          }}
+                          className="p-1 hover:bg-blue-100 rounded"
+                          title="복제"
+                        >
+                          <Copy className="h-4 w-4 text-blue-500" />
+                        </button>
                         <button
                           onClick={(e) => {
                             e.stopPropagation();