feat(bots): refine event binding editor UI and i18n

- Move conditions toggle between event select and arrow; drop "IF" label
- Remove "all events" (*) option from event select
- Add i18n labels for concrete event names (zh/en/ja) via bots.eventNames
- Narrow fallback event set to message.received for adapters without
  declared supported_events (legacy adapters only emit message.received)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/i18n/locales/zh-Hans.ts

@@ -372,6 +372,23 @@ const zhHans = {
     eventCustom: '自定义事件',
     eventWildcard: '全部事件',
     eventNamespaceWildcard: '{{namespace}}.*',
+    eventNames: {
+      message_received: '收到消息',
+      message_edited: '消息被编辑',
+      message_deleted: '消息被删除',
+      message_reaction: '消息表态',
+      feedback_received: '收到反馈',
+      friend_request_received: '收到好友请求',
+      friend_added: '好友添加成功',
+      group_member_joined: '成员加入群组',
+      group_member_left: '成员离开群组',
+      group_member_banned: '成员被封禁',
+      bot_invited_to_group: '机器人被邀入群',
+      bot_removed_from_group: '机器人被移出群',
+      bot_muted: '机器人被禁言',
+      bot_unmuted: '机器人被解除禁言',
+      platform_specific: '平台特定事件',
+    },
     conditions: '触发条件',
     conditionsDescription: '满足所有条件时才触发此绑定，不添加则无条件触发。',
     conditionsEmpty: '无条件，始终触发。',