refactor(desktop): split kernel_commands/pipeline_commands into modules, add SaaS client libs and gateway modules

Split monolithic kernel_commands.rs (2185 lines) and pipeline_commands.rs (1391 lines)
into focused sub-modules under kernel_commands/ and pipeline_commands/ directories.
Add gateway module (commands, config, io, runtime), health_check, and 15 new
TypeScript client libraries for SaaS relay, auth, admin, telemetry, and kernel
sub-systems (a2a, agent, chat, hands, skills, triggers).

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

desktop/src/components/AgentOnboardingWizard.tsx

@@ -91,6 +91,7 @@ const steps = [
 
 export function AgentOnboardingWizard({ isOpen, onClose, onSuccess }: AgentOnboardingWizardProps) {
   const { createClone, createFromTemplate, updateClone, clones, isLoading, error, clearError } = useAgentStore();
+  const availableTemplates = useSaaSStore((s) => s.availableTemplates);
   const [currentStep, setCurrentStep] = useState(0);
   const [formData, setFormData] = useState<WizardFormData>(initialFormData);
   const [errors, setErrors] = useState<Record<string, string>>({});
@@ -384,7 +385,7 @@ export function AgentOnboardingWizard({ isOpen, onClose, onSuccess }: AgentOnboa
                       <div className="font-medium text-sm">空白 Agent</div>
                       <div className="text-xs text-muted-foreground">从零配置</div>
                     </button>
-                    {useSaaSStore.getState().availableTemplates.map(t => (
+                    {(availableTemplates ?? []).map(t => (
                       <button
                         key={t.id}
                         type="button"