fix(pages): preserve scroll after action submissions

packages/void/src/pages/client.ts

@@ -282,7 +282,10 @@ export async function submitAction(
   options: VisitOptions,
 ): Promise<ActionResult> {
   try {
-    const pageData = await router.visit(url, options);
+    const pageData = await router.visit(url, {
+      preserveScroll: true,
+      ...options,
+    });
     if (
       typeof pageData === 'object' &&
       pageData !== null &&

packages/void/test/unit/action-result.test.ts

@@ -126,6 +126,37 @@ describe('action result handling', () => {
     expect(isAbortError(new DOMException('Navigation aborted', 'AbortError'))).toBe(true);
     expect(isAbortError(new Error('Boom'))).toBe(false);
   });
+
+  it('preserves scroll by default when submitting an action', async () => {
+    const visit = vi.fn(async () => ({ props: {} }));
+    const router = routerWithVisit(visit);
+
+    await submitAction(router, '/users', {
+      method: 'POST',
+      data: { name: 'Alice' },
+    });
+
+    expect(visit).toHaveBeenCalledWith('/users', {
+      preserveScroll: true,
+      method: 'POST',
+      data: { name: 'Alice' },
+    });
+  });
+
+  it('allows explicitly disabling scroll preservation', async () => {
+    const visit = vi.fn(async () => ({ props: {} }));
+    const router = routerWithVisit(visit);
+
+    await submitAction(router, '/users', {
+      method: 'POST',
+      preserveScroll: false,
+    });
+
+    expect(visit).toHaveBeenCalledWith('/users', {
+      preserveScroll: false,
+      method: 'POST',
+    });
+  });
 });
 
 describe('action clients', () => {
@@ -138,6 +169,7 @@ describe('action clients', () => {
       method: 'POST',
       data: undefined,
       _resolveOnShell: true,
+      preserveScroll: true,
     });
   });
 
@@ -169,6 +201,7 @@ describe('action clients', () => {
     expect(firstVisit).toHaveBeenCalledWith('/__action-test/static', {
       method: 'POST',
       data: undefined,
+      preserveScroll: true,
     });
   });
 
@@ -186,6 +219,7 @@ describe('action clients', () => {
     expect(visit).toHaveBeenCalledWith('/__action-test/users/a%2Fb%3Fc?save', {
       method: 'PATCH',
       data: { name: 'Alice' },
+      preserveScroll: true,
     });
   });