Alt attribute lost after resize/crop

[medienbaecker]

Description

Returning an image file also handles populating the alt attribute with the alt field. After resizing or cropping the image, this alt text is however lost, returning an empty alt attribute.

Without resizing

echo $page->image();

<img src="image.jpg" alt="My alt text">

Same image after resizing

echo $page->image()->resize(600);

<img src="image.jpg" alt="">

By simply returning an image, Kirby calls html(), as defined in its __toString() function. This method can be found here:

kirby/src/Image/Image.php

Lines 116 to 134 in 94cc37e

	public function html(array $attr = []): string
	{
	// if no alt text explicitly provided,
	// try to infer from model content file
	if (
	$this->model !== null &&
	method_exists($this->model, 'content') === true &&
	$this->model->content() instanceof Content &&
	$this->model->content()->get('alt')->isNotEmpty() === true
	) {
	$attr['alt'] ??= $this->model->content()->get('alt')->value();
	}
	if ($url = $this->url()) {
	return Html::img($url, $attr);
	}
	throw new LogicException('Calling Image::html() requires that the URL property is not null');
	}

Expected behavior
The alt tag should be returned after resizing/cropping the image.

To reproduce

1. Make sure your page has an image
2. Return something like $page->image() and see the alt text
3. Add ->resize(600) or ->crop(600, 400) to it and see the alt text disappear

Your setup

Kirby Version
Tested in 4.4.1 and 4.5.0