`withinFrame` hangs on pages with external iframes (Stripe, etc)

withinFrame calls waitForLoadState('networkidle') before interacting with the iframe:

https://github.com/pestphp/pest-plugin-browser/blob/4.x/src/Api/Concerns/InteractsWithFrames.php#L21

The problem is that external iframes like Stripe Elements keep persistent connections open, so networkidle never resolves and the test hangs indefinitely.

The next line already calls waitFor(['state' => 'attached']) on the iframe locator, which should be sufficient. The networkidle wait seems unnecessary here.

Workaround I'm using ... manually locate the iframe and construct the Page object, skipping the networkidle wait:

function withinExternalFrame($browser, string $selector, callable $callback)
{
    $page = $browser->page();
    $locator = $page->locator($selector)->locator('iframe');
    $locator->waitFor(['state' => 'attached']);

    $contentFrameObj = $locator->contentFrame();
    $iframePage = new Pest\Browser\Playwright\Page(
        $page->context(),
        $contentFrameObj->guid,
        $contentFrameObj->guid,
    );

    $callback(new Pest\Browser\Api\AwaitableWebpage($iframePage, $page->url()));

    return $browser;
}

Pest Browser v4.3.0, testing Stripe Elements checkout pages.

Start in src/Api/Concerns/InteractsWithFrames.php at line 21 and inspect the network-idle wait before the iframe locator's attached-state wait. Reproduce the behavior with a Stripe Elements or other external iframe page. Done means withinFrame can interact with external iframes without hanging while normal frame handling still works.