Finer generation of "Background image" Link

[mittler-works]

Is your feature request related to a problem? Please describe.

Yes, I bind-mount a Background Image into the authentik container, at /web/dist/assets/images/custom_background.png. Then, inside the flow, I set the path to /static/dist/assets/images/custom_background.png. The problem is, the auto-generated "Backgound image" link is still present and points to the default image attribution.

This is because here:

authentik/web/src/flow/FlowExecutor.ts

Lines 526 to 535 in 99cecdb

	${this.flowInfo?.background?.startsWith("/static")
	? html`
	<li>
	<a
	href="https://unsplash.com/@marcute"
	>${msg("Background image")}</a
	>
	</li>
	`
	: html``}

the Background image link is generated based on the fact that url start with /static.

Describe the solution you'd like

I can think of an easy solution, that would be to check the whole path of the image to be /static/dist/assets/images/flow_background.jpg and not only to check if it starts with /static.

But this is still not optimal either, as there is still a problem: I could come up with the idea to mount a custom image on the default path /static/dist/assets/images/flow_background.jpg so I could have my default image without the need to change the background settings in every flow. With the proposed solution, this szenario would not work either.

Describe alternatives you've considered

I've found a quite easy workaround: it seems that if I prepend the scheme/host to the url, the check does not evaluate to true: e.g. http://localhost:9000/static/dist/assets/images/flow_background.jpg does not seem to trigger the check. However, this forces me to know the host in advance.

[tongkl1]

It would be great if a toggle can be added to turn off the attribution. Mounting an image to /web/dist/assets/images/flow_background.jpg has multiple benefits than setting the images in single flows, e.g. there's a hardcoded prefetch in the flow template pointing to that image even when a custom image is specified. Currently I have to use custom CSS to make the attribution not display

[BeryJu]

closed by #10318