fix(frontend): ページ遷移でスクロール位置が保持されない問題を修正

Fix #11068

packages/frontend/src/ui/deck/main-column.vue

@@ -7,24 +7,29 @@
 		</template>
 	</template>
 
-	<RouterView @contextmenu.stop="onContextmenu"/>
+	<div ref="contents">
+		<RouterView @contextmenu.stop="onContextmenu"/>
+	</div>
 </XColumn>
 </template>
 
 <script lang="ts" setup>
-import { ComputedRef, provide } from 'vue';
+import { ComputedRef, provide, shallowRef } from 'vue';
 import XColumn from './column.vue';
 import { deckStore, Column } from '@/ui/deck/deck-store';
 import * as os from '@/os';
 import { i18n } from '@/i18n';
 import { mainRouter } from '@/router';
 import { PageMetadata, provideMetadataReceiver } from '@/scripts/page-metadata';
+import { useScrollPositionManager } from '@/nirax';
+import { getScrollContainer } from '@/scripts/scroll';
 
 defineProps<{
 	column: Column;
 	isStacked: boolean;
 }>();
 
+const contents = shallowRef<HTMLElement>();
 let pageMetadata = $ref<null | ComputedRef<PageMetadata>>();
 
 provide('router', mainRouter);
@@ -61,4 +66,6 @@ function onContextmenu(ev: MouseEvent) {
 		},
 	}], ev);
 }
+
+useScrollPositionManager(() => getScrollContainer(contents.value), mainRouter);
 </script>