fix: 使用 NScrollbar 统一内容区滚动条

src/features/subject-identity/components/IdentityGallery.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { NAlert, NButton, NCollapse, NCollapseItem, NTag } from 'naive-ui'
+import { NScrollbar, NAlert, NButton, NCollapse, NCollapseItem, NTag } from 'naive-ui'
 import { computed, ref, watch } from 'vue'
 import { AssetImage, StatusBadge } from '../../../components/ui'
 import { referenceImageUrl } from '../../../lib/assets'
@@ -132,7 +132,12 @@ function chooseAnchor() {
                 本次锚定图片 ID：{{ readImageProvenance(selected.rawJson).referenceImageId }}
             </p>
             <p class="mt-2 break-all font-mono text-[10px] text-muted">Identity image ID · {{ selected.id }}</p>
-            <div class="image-history mt-4" aria-label="身份图片历史">
+            <NScrollbar
+                x-scrollable
+                content-class="image-history-content"
+                class="image-history mt-4"
+                aria-label="身份图片历史"
+            >
                 <NButton
                     v-for="image in images"
                     :key="image.id"
@@ -154,7 +159,7 @@ function chooseAnchor() {
                               : identityViewLabels[image.viewType]
                     }}</span></NButton
                 >
-            </div>
+            </NScrollbar>
         </template>
         <p v-else class="py-8 text-sm text-muted">尚无身份参考图。先保存身份提示词，再生成第一张母版。</p>
     </section>