feat(sidebar): mark Agent entries as Agent or Pipeline

Add a trailing badge (icon + label) to each entry in the sidebar Agent
section so users can tell Agent orchestration apart from legacy Pipeline.
Thread the agent `kind` field through SidebarEntityItem.

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

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

@@ -516,6 +516,8 @@ const zhHans = {
     agentOrchestrationDescription:
       '面向 EBA 事件的处理逻辑，可用于消息、群成员、好友、反馈等事件。',
     pipelineType: 'Pipeline',
+    kindBadgeAgent: 'Agent',
+    kindBadgePipeline: '流水线',
     pipelineTypeDescription:
       '保留现有无代码消息流水线，兼容旧配置，只能处理消息事件。',
     allEvents: '支持全部 EBA 事件',