fix: 修复维基正文空白与个人资料、皮肤预览错乱

- WikiNodeRenderer 补回 WikiAttachmentNode/WikiNotice 导入，正文不再空白
- 个人资料与皮肤预览 key 改用 selectedId，避免瞬时 null 反复重建

apps/app-frontend/src/components/ui/skin-site/SkinSiteProfileView.vue

@@ -622,7 +622,7 @@ watch(signedIn, (value) => {
 						</div>
 						<SkinPreviewRenderer
 							v-else
-							:key="`${selectedPlayer.uuid}:${texture.skin ?? ''}:${texture.cape ?? ''}`"
+							:key="selectedId ?? ''"
 							:texture-src="texture.skin ?? ''"
 							:cape-src="texture.cape"
 							:variant="skinVariant"

apps/app-frontend/src/components/ui/skin-site/wiki/WikiNodeRenderer.vue

@@ -1,6 +1,8 @@
 <script setup lang="ts">
 import { type SkinSiteWikiNode } from '@/helpers/skin-site-api'
 
+import WikiAttachmentNode from './WikiAttachmentNode.vue'
+import WikiNotice from './WikiNotice.vue'
 import { safeExternalUrl, safeWikiColor } from './wiki-color'
 
 defineOptions({ name: 'WikiNodeRenderer' })