fix: 修复重置 loadingDelay 为 undefined 后，定时器没有被清理而导致 loading 始终为 true 的 bug

Author: guaijie

packages/hooks/src/useRequest/src/plugins/useLoadingDelayPlugin.ts

@@ -4,16 +4,23 @@ import type { Plugin, Timeout } from '../types';
 const useLoadingDelayPlugin: Plugin<any, any[]> = (fetchInstance, { loadingDelay, ready }) => {
   const timerRef = useRef<Timeout>();
 
-  if (!loadingDelay) {
-    return {};
-  }
-
   const cancelTimeout = () => {
     if (timerRef.current) {
       clearTimeout(timerRef.current);
     }
   };
 
+  if (!loadingDelay) {
+    return {
+      onFinally: () => {
+        cancelTimeout();
+      },
+      onCancel: () => {
+        cancelTimeout();
+      },
+    };
+  }
+
   return {
     onBefore: () => {
       cancelTimeout();