feat: [planning-design] 스토리보드 페이지 복사 기능 추가

resources/views/rd/planning-design/index.blade.php

@@ -1344,6 +1344,8 @@
                 <div class="sb-topbar-sep"></div>
                 <button style="padding:4px 10px; border:1px solid #e2e8f0; border-radius:6px; font-size:11px; cursor:pointer; background:#fff; color:#374151;"
                         @click="sbAddPage()">+ 페이지 추가</button>
+                <button style="padding:4px 10px; border:1px solid #e2e8f0; border-radius:6px; font-size:11px; cursor:pointer; background:#fff; color:#2563eb;"
+                        @click="sbDuplicatePage()">페이지 복사</button>
                 <button style="padding:4px 10px; border:1px solid #e2e8f0; border-radius:6px; font-size:11px; cursor:pointer; background:#fff; color:#ef4444;"
                         x-show="sb.pages.length > 1"
                         @click="sbDeletePage()">페이지 삭제</button>
@@ -2848,6 +2850,23 @@ function planningCanvas() {
             this.autoSave();
         },
 
+        sbDuplicatePage() {
+            const page = this.sbCurrentPage;
+            if (!page) return;
+            const copy = JSON.parse(JSON.stringify(page));
+            copy.id = 'pg_' + Date.now();
+            copy.screenName = (copy.screenName || '화면') + ' (복사)';
+            // 블록 id도 새로 생성
+            if (copy.blocks) {
+                copy.blocks.forEach(blk => {
+                    blk.id = 'blk_' + Date.now() + '_' + Math.random().toString(36).slice(2, 5);
+                });
+            }
+            this.sb.pages.splice(this.sb.currentPageIndex + 1, 0, copy);
+            this.sb.currentPageIndex = this.sb.currentPageIndex + 1;
+            this.autoSave();
+        },
+
         sbDeletePage() {
             if (this.sb.pages.length <= 1) return;
             if (!confirm('이 페이지를 삭제하시겠습니까?')) return;