fix: モバイル表示のときページ下部がナビゲーションバーに隠れる問題を修正 (#110)

* fix: insert bottom spacing appropriately

* Revert CHANGELOG.md

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Co-authored-by: ibuki2003 <main@fuwa.dev>

packages/frontend/src/ui/universal.vue

@@ -207,9 +207,11 @@ watch($$(navFooter), () => {
 	if (navFooter) {
 		navFooterHeight = navFooter.offsetHeight;
 		document.body.style.setProperty('--stickyBottom', `${navFooterHeight}px`);
+		document.body.style.setProperty('--minBottomSpacing', 'var(--minBottomSpacingMobile)');
 	} else {
 		navFooterHeight = 0;
 		document.body.style.setProperty('--stickyBottom', '0px');
+		document.body.style.setProperty('--minBottomSpacing', '0px');
 	}
 }, {
 	immediate: true,