fix: singleton will throw an additional error

packages/web/src/utils.ts

@@ -56,8 +56,7 @@ export function singleton<Fn extends (...args: any) => Promise<any>>(fn: Fn): Fn
   return function (this: unknown, ...args) {
     if (latestPromise) return latestPromise
 
-    const promise = fn.apply(this, args)
-    promise.finally(() => {
+    const promise = fn.apply(this, args).finally(() => {
       if (promise === latestPromise) {
         latestPromise = null
       }