chore: stabilize Zhinian pilot delivery

src/pages/NianxxPlay/index.tsx

@@ -1,6 +1,6 @@
 import { useCallback, useEffect, useMemo, useState } from 'react';
 import type { ComponentType } from 'react';
-import { AlertTriangle, ArrowLeft, Film, FolderClock, Loader2, RefreshCcw, WalletCards } from 'lucide-react';
+import { AlertTriangle, ArrowLeft, Film, FolderClock, Loader2, RefreshCcw, Sparkles } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
 import { useNavigate } from 'react-router-dom';
 import { Button } from '@/components/ui/button';
@@ -9,7 +9,7 @@ import { hostApiFetch } from '@/lib/host-api';
 
 const DEFAULT_NIANXX_PLAY_URL = 'http://127.0.0.1:3000';
 
-type NianxxPlayRoute = '/' | '/projects' | '/billing';
+type NianxxPlayRoute = '/' | '/projects' | '/planning';
 type ServiceState = 'checking' | 'starting' | 'running' | 'error';
 
 type NianxxPlayServiceStatus = {
@@ -31,7 +31,7 @@ const NIANXX_PLAY_NAV: Array<{
 }> = [
   { path: '/', labelKey: 'host.nav.create', icon: Film },
   { path: '/projects', labelKey: 'host.nav.projects', icon: FolderClock },
-  { path: '/billing', labelKey: 'host.nav.billing', icon: WalletCards },
+  { path: '/planning', labelKey: 'host.nav.planning', icon: Sparkles },
 ];
 
 function buildEmbeddedSrc(baseUrl: string, route: NianxxPlayRoute, reloadKey: number) {
@@ -136,6 +136,7 @@ export function NianxxPlay() {
             variant="outline"
             size="sm"
             onClick={() => navigate('/app-center')}
+            data-testid="nianxx-play-back"
             className="shrink-0"
           >
             <ArrowLeft className="h-4 w-4" />
@@ -167,6 +168,7 @@ export function NianxxPlay() {
                 key={item.path}
                 type="button"
                 onClick={() => openRoute(item.path)}
+                data-testid={`nianxx-play-nav-${item.path === '/' ? 'create' : item.path.slice(1)}`}
                 className={cn(
                   'inline-flex h-8 items-center gap-1.5 rounded-md px-3 text-xs font-medium transition-colors',
                   active