Investigate Laravels asset helper

[ollieread]

Laravel's asset() helper makes use of APP_URL, which could be an issue when using something like subdomain routing.

A similar issue is mentioned in Trevors blog here: https://www.trovster.com/blog/2023/08/filament-panel-domain-issue

[ollieread]

The asset() helper makes use of UrlGenerator::asset(), which generates the URL using several possible values for the host. Here they are, in order of precedence.

• assetRoot - Set in the UrlGenerator constructor using the config value app.asset_url
• cachedRoot - Set the first time UrlGenerator::formatRoot() is called
• forcedRoot - Set by calling UrlGenerator::forceRootUrl()
• Request::root() - Comes from the request

From what I can tell, in a standard Laravel and Filament install, UrlGenerator::forceRootUrl() is not called anywhere. It may be worth setting a root URL when a tenant is identified.

I don't think anything needs to be done with this, but I've created a PR to introduce a setAssetRoot method to help if it does need setting.

[ollieread]

The PR laravel/framework#54530 was merged with a change of the name to setAssetOrigin