Update AI chat to use correct API endpoint for fetching models

Change query key and data access for OpenRouter models in AiChat component.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Event-Id: 30146ff9-f3f2-44ad-aebf-af4a55a7e960
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/f2EnhiB

client/src/components/ai-chat.tsx

@@ -36,11 +36,11 @@ export default function AiChat() {
   const { toast } = useToast();
 
   // Fetch available models from OpenRouter
-  const { data: modelsData, isLoading: modelsLoading } = useQuery<{ models: OpenRouterModel[] }>({
-    queryKey: ['/api/ai/models'],
+  const { data: modelsData, isLoading: modelsLoading } = useQuery<{ data: OpenRouterModel[] }>({
+    queryKey: ['/api/openrouter/models'],
   });
 
-  const availableModels = modelsData?.models || [];
+  const availableModels = modelsData?.data || [];
 
   const generateMutation = useMutation({
     mutationFn: async (productInfo: any) => {