refactor: marketplace state management (#30702)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

web/context/query-client-server.ts

@@ -0,0 +1,16 @@
+import { QueryClient } from '@tanstack/react-query'
+import { cache } from 'react'
+
+const STALE_TIME = 1000 * 60 * 30 // 30 minutes
+
+export function makeQueryClient() {
+  return new QueryClient({
+    defaultOptions: {
+      queries: {
+        staleTime: STALE_TIME,
+      },
+    },
+  })
+}
+
+export const getQueryClientServer = cache(makeQueryClient)

web/context/query-client.tsx

@@ -1,23 +1,27 @@
 'use client'
 
+import type { QueryClient } from '@tanstack/react-query'
 import type { FC, PropsWithChildren } from 'react'
-import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { QueryClientProvider } from '@tanstack/react-query'
+import { useState } from 'react'
 import { TanStackDevtoolsLoader } from '@/app/components/devtools/tanstack/loader'
+import { makeQueryClient } from './query-client-server'
 
-const STALE_TIME = 1000 * 60 * 30 // 30 minutes
+let browserQueryClient: QueryClient | undefined
 
-const client = new QueryClient({
-  defaultOptions: {
-    queries: {
-      staleTime: STALE_TIME,
-    },
-  },
-})
+function getQueryClient() {
+  if (typeof window === 'undefined') {
+    return makeQueryClient()
+  }
+  if (!browserQueryClient)
+    browserQueryClient = makeQueryClient()
+  return browserQueryClient
+}
 
-export const TanstackQueryInitializer: FC<PropsWithChildren> = (props) => {
-  const { children } = props
+export const TanstackQueryInitializer: FC<PropsWithChildren> = ({ children }) => {
+  const [queryClient] = useState(getQueryClient)
   return (
-    <QueryClientProvider client={client}>
+    <QueryClientProvider client={queryClient}>
       {children}
       <TanStackDevtoolsLoader />
     </QueryClientProvider>