fix: improve Feishu/Lark channel modal UX and refine default main agent naming (#551)

src/i18n/locales/en/channels.json

@@ -40,6 +40,7 @@
         "deleteConfirm": "Are you sure you want to delete this account?",
         "default": "Current Default",
         "setDefault": "Set as channel default",
+        "bindAgentLabel": "Bound Agent",
         "unassigned": "Unassigned",
         "mainAccount": "Primary Account",
         "customIdLabel": "Account ID",

src/i18n/locales/ja/channels.json

@@ -40,6 +40,7 @@
         "deleteConfirm": "このアカウントを削除してもよろしいですか？",
         "default": "現在の既定",
         "setDefault": "チャンネル既定に設定",
+        "bindAgentLabel": "紐付け Agent",
         "unassigned": "未割り当て",
         "mainAccount": "メインアカウント",
         "customIdLabel": "アカウント ID",

src/i18n/locales/zh/channels.json

@@ -40,6 +40,7 @@
         "deleteConfirm": "确定要删除该账号吗？",
         "default": "当前默认",
         "setDefault": "设为频道默认账号",
+        "bindAgentLabel": "绑定 Agent",
         "unassigned": "未绑定",
         "mainAccount": "主账号",
         "customIdLabel": "账号 ID",