fix: Optimize form notification and test stability

Author: zhoujunxiong

src/useForm.ts

@@ -683,7 +683,7 @@ export class FormStore {
       }
 
       // Avoid exponential loops when a large number of components are unloaded
-      setTimeout(() => {
+      Promise.resolve().then(() => {
         this.notifyWatch([namePath]);
       })
     };

tests/useWatch.test.tsx

@@ -121,6 +121,11 @@ describe('useWatch', () => {
       expect(container.querySelector<HTMLDivElement>('.values')?.textContent).toEqual('bamboo');
 
       rerender(<Demo visible={false} />);
+
+      await act(async () => {
+        await timeout();
+      });
+
       expect(container.querySelector<HTMLDivElement>('.values')?.textContent).toEqual('');
 
       rerender(<Demo visible />);
@@ -158,6 +163,11 @@ describe('useWatch', () => {
       expect(container.querySelector<HTMLDivElement>('.values')?.textContent).toEqual('bamboo');
 
       rerender(<Demo visible={false} />);
+
+      await act(async () => {
+        await timeout();
+      });
+
       expect(container.querySelector<HTMLDivElement>('.values')?.textContent).toEqual('');
 
       rerender(<Demo visible />);