From 13994163c4c0e83cbd59e3422a56f9a12233643d Mon Sep 17 00:00:00 2001
From: Sayamame-beans <61457993+Sayamame-beans@users.noreply.github.com>
Date: Mon, 20 Jul 2026 18:14:00 +0900
Subject: [PATCH] =?UTF-8?q?fix(frontend):=20=E3=83=AD=E3=83=BC=E3=82=AB?=
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* fix(frontend): ensure checkMissingMention considers mentions with host for local users

* docs(changelog): update changelog
---
 CHANGELOG.md                                    | 1 +
 packages/frontend/src/components/MkPostForm.vue | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 080e9bec0a..144b6515e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,6 +36,7 @@
 - Fix: 自分へのメンションに対する色分けで、判定が大文字/小文字を区別していた問題を修正
 - Fix: いくつかのイベントリスナーが正しく解除されない問題を修正（メモリ使用量の改善）
 - Fix: 非ログイン時トップページをスクロール操作できないことがある問題を修正
+- Fix: ローカルユーザーへのホスト付きメンションが本文に含まれる指名ノートの作成時、投稿フォームにて、当該ユーザーが宛先に含まれていても正しく認識されない問題を修正
 
 ### Server
 - Feat: OpenTelemetryサポート
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 8cdaf5b1da..d4bf048956 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -445,7 +445,7 @@ function checkMissingMention() {
 		const ast = mfm.parse(text.value);
 
 		for (const x of extractMentions(ast)) {
-			if (!visibleUsers.value.some(u => (u.username === x.username) && (u.host === x.host))) {
+			if (!visibleUsers.value.some(u => (u.username === x.username) && ((u.host === x.host) || (x.host === host && u.host == null)))) {
 				hasNotSpecifiedMentions.value = true;
 				return;
 			}