refactor(beaver): 移除Hermes相关引用和迁移代码，完善Beaver后端主线实现

移除了所有Hermes相关的命名引用，包括：
- 从.gitignore中清理相关构建缓存文件
- 将README中的beaver-home路径配置更新
- 完善backend/README.md文档说明Beaver后端主线实现
- 移除Hermes风格的相关注释和兼容性代码
- 清理nanobot环境变量兼容性处理
- 删除技能迁移和服务迁移相关功能代码
- 更新测试用例中相关命名和函数名

BREAKING CHANGE: 移除了Hermes迁移相关API和CLI命令，不再支持nanobot环境变量兼容性

app-instance/frontend/components/Header.tsx

@@ -3,7 +3,7 @@
 import React from 'react';
 import Link from 'next/link';
 import { usePathname, useRouter } from 'next/navigation';
-import { Bell, Bot, ChevronDown, FolderOpen, ListTodo, LogOut, Mail, MessageSquare, PackageOpen, Puzzle, Settings, Store, Wrench } from 'lucide-react';
+import { Bell, Bot, ChevronDown, FolderOpen, ListTodo, LogOut, Mail, MessageSquare, Puzzle, Settings, Store, Wrench } from 'lucide-react';
 import { logout } from '@/lib/api';
 import { LanguageSwitcher } from '@/components/LanguageSwitcher';
 import { Avatar, AvatarFallback } from '@/components/ui/avatar';
@@ -15,7 +15,7 @@ import { useAppI18n } from '@/lib/i18n/provider';
 import { useChatStore } from '@/lib/store';
 
 type NavItem = {
-  key: 'chat' | 'tasks' | 'notifications' | 'skills' | 'files' | 'tools' | 'agents' | 'outlook' | 'marketplace' | 'plugins' | 'settings';
+  key: 'chat' | 'tasks' | 'notifications' | 'skills' | 'files' | 'tools' | 'agents' | 'outlook' | 'marketplace' | 'settings';
   href: string;
   icon: React.ComponentType<{ className?: string }>;
   matchPrefixes?: string[];
@@ -23,7 +23,7 @@ type NavItem = {
 
 const NAV_ITEMS: NavItem[] = [
   { key: 'chat', href: '/', icon: MessageSquare },
-  { key: 'tasks', href: '/tasks', icon: ListTodo, matchPrefixes: ['/tasks', '/office', '/cron'] },
+  { key: 'tasks', href: '/tasks', icon: ListTodo, matchPrefixes: ['/tasks', '/cron'] },
   { key: 'notifications', href: '/notifications', icon: Bell, matchPrefixes: ['/notifications'] },
   { key: 'skills', href: '/skills', icon: Puzzle },
   { key: 'files', href: '/files', icon: FolderOpen, matchPrefixes: ['/files'] },
@@ -31,7 +31,6 @@ const NAV_ITEMS: NavItem[] = [
   { key: 'agents', href: '/agents', icon: Bot, matchPrefixes: ['/agents'] },
   { key: 'outlook', href: '/outlook', icon: Mail, matchPrefixes: ['/outlook'] },
   { key: 'marketplace', href: '/marketplace', icon: Store, matchPrefixes: ['/marketplace'] },
-  { key: 'plugins', href: '/plugins', icon: PackageOpen, matchPrefixes: ['/plugins'] },
   {
     key: 'settings',
     href: '/settings',
@@ -43,12 +42,12 @@ const NAV_ITEMS: NavItem[] = [
 function ConnectionDot() {
   const { locale } = useAppI18n();
   const wsStatus = useChatStore((s) => s.wsStatus);
-  const nanobotReady = useChatStore((s) => s.nanobotReady);
+  const beaverReady = useChatStore((s) => s.beaverReady);
 
-  const isOnline = wsStatus === 'connected' && nanobotReady === true;
-  const isChecking = wsStatus === 'connected' && nanobotReady === null;
+  const isOnline = wsStatus === 'connected' && beaverReady === true;
+  const isChecking = wsStatus === 'connected' && beaverReady === null;
   const isConnecting = wsStatus === 'connecting' || isChecking;
-  const isOffline = wsStatus === 'disconnected' || (wsStatus === 'connected' && nanobotReady === false);
+  const isOffline = wsStatus === 'disconnected' || (wsStatus === 'connected' && beaverReady === false);
 
   const color = isOnline
     ? 'bg-[#869683]'
@@ -56,7 +55,7 @@ function ConnectionDot() {
       ? 'bg-[#8B7E77]'
       : 'bg-[#5F5550]';
 
-  const label = appConnectionStatusLabel(wsStatus, nanobotReady, locale);
+  const label = appConnectionStatusLabel(wsStatus, beaverReady, locale);
 
   return (
     <div className="flex items-center gap-1.5 text-xs text-muted-foreground">
@@ -84,7 +83,6 @@ const Header = () => {
     if (key === 'agents') return pickAppText(locale, '智能体', 'Agents');
     if (key === 'outlook') return 'Outlook';
     if (key === 'marketplace') return pickAppText(locale, '市场', 'Marketplace');
-    if (key === 'plugins') return pickAppText(locale, '插件', 'Plugins');
     return pickAppText(locale, '配置', 'Settings');
   }, [locale]);