refactor(store): split gatewayStore into specialized domain stores

Major restructuring:
- Split monolithic gatewayStore into 5 focused stores:
  - connectionStore: WebSocket connection and gateway lifecycle
  - configStore: quickConfig, workspaceInfo, MCP services
  - agentStore: clones, usage stats, agent management
  - handStore: hands, approvals, triggers, hand runs
  - workflowStore: workflows, workflow runs, execution

- Update all components to use new stores with selector pattern
- Remove

desktop/src/components/Sidebar.tsx

@@ -6,7 +6,7 @@ import {
 } from 'lucide-react';
 import { CloneManager } from './CloneManager';
 import { TeamList } from './TeamList';
-import { useGatewayStore } from '../store/gatewayStore';
+import { useConfigStore } from '../store/configStore';
 import { containerVariants, defaultTransition } from '../lib/animations';
 
 export type MainViewType = 'chat' | 'automation' | 'team' | 'swarm' | 'skills';
@@ -44,7 +44,7 @@ export function Sidebar({
 }: SidebarProps) {
   const [activeTab, setActiveTab] = useState<Tab>('clones');
   const [searchQuery, setSearchQuery] = useState('');
-  const userName = useGatewayStore((state) => state.quickConfig.userName) || '用户7141';
+  const userName = useConfigStore((state) => state.quickConfig?.userName) || '用户7141';
 
   const handleNavClick = (key: Tab, mainView?: MainViewType) => {
     setActiveTab(key);