enhance: metaをSSR HTMLに埋め込む (#13436)

* enhance: `meta`をSSR HTMLに埋め込む

* HTML Metaの有効時間を指定

* １時間

* MetaEntityService

* JSONをPackするように

* ✌️

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Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/pages/admin/moderation.vue

@@ -110,7 +110,7 @@ function save() {
 		hiddenTags: hiddenTags.value.split('\n'),
 		preservedUsernames: preservedUsernames.value.split('\n'),
 	}).then(() => {
-		fetchInstance();
+		fetchInstance(true);
 	});
 }