fix: offhand-buffer hat swap and share display name (26.9.5)

lang/en_us.yml

@@ -19,6 +19,7 @@ iridium.hat_success: 'Swapped hand item with head equipment'
 iridium.hat_unsupported_version: 'Version {0} does not support !!hat (needs Minecraft 1.8+)'
 iridium.hat_need_rcon: '!!hat requires RCON enabled to read and swap item data'
 iridium.hat_query_failed: 'Failed to query player item data'
+iridium.hat_offhand_busy: 'Off-hand is occupied; clear it before using !!hat'
 iridium.head_help: 'Get one player head (optional player name, cooldown {0}s)'
 iridium.head_help_short: 'Get one player head (optional player name)'
 iridium.head_success: 'You received a head of {0}'

lang/zh_cn.yml

@@ -19,6 +19,7 @@ iridium.hat_success: '已交换手上物品与头部装备'
 iridium.hat_unsupported_version: '当前版本 {0} 不支持 !!hat（需要 Minecraft 1.8+）'
 iridium.hat_need_rcon: '!!hat 需要启用 RCON 才能读取并交换物品数据'
 iridium.hat_query_failed: '读取玩家物品数据失败'
+iridium.hat_offhand_busy: '副手有物品，无法安全交换；请先清空副手再使用 !!hat'
 iridium.head_help: '获取一个玩家头颅（可指定玩家名，冷却 {0} 秒）'
 iridium.head_help_short: '获取一个玩家头颅（可指定玩家名）'
 iridium.head_success: '已给予你 {0} 的头颅'