diff --git a/app/Services/ChecklistTemplateService.php b/app/Services/ChecklistTemplateService.php
index a0ca96e..018928f 100644
--- a/app/Services/ChecklistTemplateService.php
+++ b/app/Services/ChecklistTemplateService.php
@@ -93,17 +93,59 @@ public function save(int $id, array $data): array
         $template->refresh();
 
         $this->auditLogger->log(
+            $this->tenantId(),
             self::AUDIT_TARGET,
             $template->id,
             'updated',
             $before,
-            $template->toArray(),
-            $this->apiUserId()
+            $template->toArray()
         );
 
         return $this->getByType($template->type);
     }
 
+    /**
+     * 항목 완료 토글
+     */
+    public function toggleItem(int $id, string $subItemId): array
+    {
+        $template = ChecklistTemplate::findOrFail($id);
+        $categories = $template->categories;
+        $toggled = null;
+
+        foreach ($categories as &$category) {
+            if (empty($category['subItems'])) {
+                continue;
+            }
+            foreach ($category['subItems'] as &$subItem) {
+                if ($subItem['id'] === $subItemId) {
+                    $subItem['is_completed'] = ! ($subItem['is_completed'] ?? false);
+                    $subItem['completed_at'] = $subItem['is_completed'] ? now()->toIso8601String() : null;
+                    $toggled = $subItem;
+                    break 2;
+                }
+            }
+            unset($subItem);
+        }
+        unset($category);
+
+        if (! $toggled) {
+            throw new NotFoundHttpException(__('error.not_found'));
+        }
+
+        $template->update([
+            'categories' => $categories,
+            'updated_by' => $this->apiUserId(),
+        ]);
+
+        return [
+            'id' => $toggled['id'],
+            'name' => $toggled['name'],
+            'is_completed' => $toggled['is_completed'],
+            'completed_at' => $toggled['completed_at'],
+        ];
+    }
+
     /**
      * 항목별 파일 목록 조회
      */
@@ -152,7 +194,7 @@ public function uploadDocument(int $templateId, string $subItemId, $uploadedFile
         );
 
         // 파일 저장
-        Storage::disk('tenant')->put($filePath, file_get_contents($uploadedFile->getPathname()));
+        Storage::disk('r2')->put($filePath, file_get_contents($uploadedFile->getPathname()));
 
         // DB 레코드 생성
         $file = File::create([