Fix remaining OpenCode review comments

ui/src/components/OnboardingWizard.tsx

@@ -149,6 +149,8 @@ export function OnboardingWizard() {
   const {
     data: adapterModels,
     error: adapterModelsError,
+    isLoading: adapterModelsLoading,
+    isFetching: adapterModelsFetching,
   } = useQuery({
     queryKey:
       createdCompanyId
@@ -332,6 +334,10 @@ export function OnboardingWizard() {
           );
           return;
         }
+        if (adapterModelsLoading || adapterModelsFetching) {
+          setError("OpenCode models are still loading. Please wait and try again.");
+          return;
+        }
         const discoveredModels = adapterModels ?? [];
         if (!discoveredModels.some((entry) => entry.id === selectedModelId)) {
           setError(