chore(dashboard): render main layout as home page for v2 (#6823)

* chore(dashboard): render main layout as home page for v2

* chore: throw an error on store not existing

packages/admin-next/dashboard/src/lib/api-v2/store.ts

@@ -8,7 +8,11 @@ export const useV2Store = ({ initialData }: { initialData?: any }) => {
     { initialData }
   )
 
-  const store = data.stores[0]
+  const store = data?.stores[0]
+
+  if (!isLoading && !isError && typeof store === "undefined") {
+    throw new Error("Store does not exist")
+  }
 
   return { store, isLoading, isError, error }
 }