Update agent orchestration and knowledge flow

Add sub-commander orchestration updates, align frontend integrations, and refine knowledge view behavior without including local data artifacts.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/app/navigation/nav.ts

@@ -21,7 +21,7 @@ export interface NavItem {
 
 export const navItems: NavItem[] = [
   { name: '沟通系统', path: '/chat', icon: MessageCircle },
-  { name: '智能链路', path: '/agents', icon: Bot },
+  { name: '奥创中心', path: '/agents', icon: Bot },
   { name: '技能中心', path: '/skills', icon: Star },
   { name: '资料中枢', path: '/knowledge', icon: BookOpen },
   { name: '知识大脑', path: '/brain', icon: Network },