feat(desktop): integrate SaaS llm_routing, template API, and onboarding template selection

- Add AgentTemplateAvailable/AgentTemplateFull types and fetchAvailableTemplates/fetchTemplateFull API methods to saas-client
- Add llm_routing field to SaaSAccountInfo for admin-configured routing priority
- Add availableTemplates state and fetchAvailableTemplates action to saasStore with background fetch on login
- Add admin llm_routing priority check in connectionStore connect() to force relay or local mode
- Add createFromTemplate action to agentStore with SOUL.md persistence
- Add Step 0 template selection to AgentOnboardingWizard with grid layout for template browsing

desktop/src/store/agentStore.ts

@@ -6,6 +6,7 @@
  */
 import { create } from 'zustand';
 import type { GatewayClient } from '../lib/gateway-client';
+import type { AgentTemplateFull } from '../lib/saas-client';
 import { useChatStore } from './chatStore';
 
 // === Types ===
@@ -33,6 +34,7 @@ export interface Clone {
   communicationStyle?: string; // 沟通风格描述
   notes?: string; // 用户备注
   onboardingCompleted?: boolean; // 是否完成首次引导
+  source_template_id?: string; // 模板来源 ID
 }
 
 export interface UsageStats {
@@ -83,6 +85,7 @@ export interface AgentStateSlice {
 export interface AgentActionsSlice {
   loadClones: () => Promise<void>;
   createClone: (opts: CloneCreateOptions) => Promise<Clone | undefined>;
+  createFromTemplate: (template: AgentTemplateFull) => Promise<Clone | undefined>;
   updateClone: (id: string, updates: Partial<Clone>) => Promise<Clone | undefined>;
   deleteClone: (id: string) => Promise<void>;
   loadUsageStats: () => Promise<void>;
@@ -173,6 +176,43 @@ export const useAgentStore = create<AgentStore>((set, get) => ({
     }
   },
 
+  createFromTemplate: async (template: AgentTemplateFull) => {
+    const client = getClient();
+    if (!client) return undefined;
+
+    set({ isLoading: true, error: null });
+    try {
+      const result = await client.createClone({
+        name: template.name,
+        emoji: template.emoji,
+        personality: template.personality,
+        scenarios: template.scenarios,
+        communicationStyle: template.communication_style,
+        model: template.model,
+      });
+
+      const cloneId = result?.clone?.id;
+
+      // Persist SOUL.md via identity system
+      if (cloneId && template.soul_content) {
+        try {
+          const { intelligenceClient } = await import('../lib/intelligence-client');
+          await intelligenceClient.identity.updateFile(cloneId, 'soul', template.soul_content);
+        } catch (e) {
+          console.warn('Failed to persist soul_content:', e);
+        }
+      }
+
+      await get().loadClones();
+      return result?.clone;
+    } catch (error) {
+      set({ error: String(error) });
+      return undefined;
+    } finally {
+      set({ isLoading: false });
+    }
+  },
+
   updateClone: async (id: string, updates: Partial<Clone>) => {
     const client = getClient();
     if (!client) {