Fix failing tests: Update test expectations and pause validation

1. Update ReactFinalForm test to expect 2 registerField calls
   (once for initial state, once for subscription)
2. Pause/resume validation during synchronous registration
   to prevent React "setState during render" errors

Author: Dinesh Agent

src/ReactFinalForm.test.js

@@ -925,9 +925,10 @@ describe("ReactFinalForm", () => {
     expect(formMock).toHaveBeenCalled();
 
     // called once on first render to get initial state, and then again to subscribe
-    expect(formMock).toHaveBeenCalledTimes(1);
+    expect(formMock).toHaveBeenCalledTimes(2);
     expect(formMock.mock.calls[0][0]).toBe("name");
-    expect(formMock.mock.calls[0][2].active).toBe(true); // default subscription
+    expect(formMock.mock.calls[1][0]).toBe("name");
+    expect(formMock.mock.calls[1][2].active).toBe(true); // default subscription
   });
 
   it("should not destroy on unregister on initial unregister", () => {

src/useField.ts

@@ -106,11 +106,17 @@ function useField<
     const destroyOnUnregister = form.destroyOnUnregister;
     form.destroyOnUnregister = false;
 
+    // Pause validation to prevent notifications during synchronous registration
+    form.pauseValidation();
+
     // Register field synchronously with silent=true, capture state, then unregister
     register((fieldState) => {
       initialFieldState = fieldState;
     }, true)();
 
+    // Resume validation
+    form.resumeValidation();
+
     // Restore destroyOnUnregister to its original value
     form.destroyOnUnregister = destroyOnUnregister;