feat:문서관리 Phase 1.3~2.1 구현 (시드데이터, 복제, 문서생성)

- Phase 1.3: EGI/SUS 수입검사 시드 데이터 생성 (IncomingInspectionTemplateSeeder)
- Phase 1.5: 양식 복제 기능 (duplicate API, 테이블 버튼, JS)
- Phase 2.1: 문서 생성 보완
  - 문서번호 카테고리별 prefix (IQC/PRD/SLS/PUR-YYMMDD-순번)
  - 결재라인 초기화 (template.approvalLines → document_approvals)
  - 기본필드 뷰 속성 수정 (field_type, Str::slug field_key)
  - store()에 DB 트랜잭션 추가

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/Http/Controllers/Api/Admin/DocumentTemplateApiController.php

@@ -217,6 +217,108 @@ public function toggleActive(int $id): JsonResponse
         ]);
     }
 
+    /**
+     * 양식 복제
+     */
+    public function duplicate(Request $request, int $id): JsonResponse
+    {
+        $source = DocumentTemplate::with([
+            'approvalLines',
+            'basicFields',
+            'sections.items',
+            'columns',
+        ])->findOrFail($id);
+
+        $newName = $request->input('name', $source->name.' (복사)');
+
+        try {
+            DB::beginTransaction();
+
+            $newTemplate = DocumentTemplate::create([
+                'tenant_id' => $source->tenant_id,
+                'name' => $newName,
+                'category' => $source->category,
+                'title' => $source->title,
+                'company_name' => $source->company_name,
+                'company_address' => $source->company_address,
+                'company_contact' => $source->company_contact,
+                'footer_remark_label' => $source->footer_remark_label,
+                'footer_judgement_label' => $source->footer_judgement_label,
+                'footer_judgement_options' => $source->footer_judgement_options,
+                'is_active' => false,
+            ]);
+
+            foreach ($source->approvalLines as $line) {
+                DocumentTemplateApprovalLine::create([
+                    'template_id' => $newTemplate->id,
+                    'name' => $line->name,
+                    'dept' => $line->dept,
+                    'role' => $line->role,
+                    'sort_order' => $line->sort_order,
+                ]);
+            }
+
+            foreach ($source->basicFields as $field) {
+                DocumentTemplateBasicField::create([
+                    'template_id' => $newTemplate->id,
+                    'label' => $field->label,
+                    'field_type' => $field->field_type,
+                    'default_value' => $field->default_value,
+                    'sort_order' => $field->sort_order,
+                ]);
+            }
+
+            foreach ($source->sections as $section) {
+                $newSection = DocumentTemplateSection::create([
+                    'template_id' => $newTemplate->id,
+                    'title' => $section->title,
+                    'image_path' => $section->image_path,
+                    'sort_order' => $section->sort_order,
+                ]);
+
+                foreach ($section->items as $item) {
+                    DocumentTemplateSectionItem::create([
+                        'section_id' => $newSection->id,
+                        'category' => $item->category,
+                        'item' => $item->item,
+                        'standard' => $item->standard,
+                        'method' => $item->method,
+                        'frequency' => $item->frequency,
+                        'regulation' => $item->regulation,
+                        'sort_order' => $item->sort_order,
+                    ]);
+                }
+            }
+
+            foreach ($source->columns as $col) {
+                DocumentTemplateColumn::create([
+                    'template_id' => $newTemplate->id,
+                    'label' => $col->label,
+                    'width' => $col->width,
+                    'column_type' => $col->column_type,
+                    'group_name' => $col->group_name,
+                    'sub_labels' => $col->sub_labels,
+                    'sort_order' => $col->sort_order,
+                ]);
+            }
+
+            DB::commit();
+
+            return response()->json([
+                'success' => true,
+                'message' => "'{$newName}' 양식이 복제되었습니다.",
+                'data' => $newTemplate->load(['approvalLines', 'basicFields', 'sections.items', 'columns']),
+            ]);
+        } catch (\Exception $e) {
+            DB::rollBack();
+
+            return response()->json([
+                'success' => false,
+                'message' => '복제 중 오류가 발생했습니다: '.$e->getMessage(),
+            ], 500);
+        }
+    }
+
     /**
      * 이미지 업로드
      */