horizon base path and app url conflicts

[AbuHuraira191]

Issue

This PR addresses the issue where Laravel Horizon's basePath is incorrectly constructed when the APP_URL has a suffix or when HORIZON_PATH is not properly handled. This causes 404 errors when accessing Horizon routes like /jobs and other resources.

Solution

• The code dynamically constructs window.Horizon.basePath using APP_URL and HORIZON_PATH, ensuring that any suffix or prefix is handled correctly.
• It removes trailing slashes from APP_URL and leading slashes from HORIZON_PATH to avoid double slashes in the path.
• Adjustments are made in the router configuration to ensure compatibility with different path structures.

Example Scenarios

1. APP_URL=https://example.com and HORIZON_PATH=horizon results in window.Horizon.basePath = 'https://example.com/horizon'.
2. APP_URL=https://example.com/suffix and HORIZON_PATH=horizon results in window.Horizon.basePath = 'https://example.com/suffix/horizon'.
3. APP_URL=https://example.com and HORIZON_PATH=/horizon results in window.Horizon.basePath = 'https://example.com/horizon'.

Impact

This change ensures that Horizon's base path is constructed correctly for all configurations of APP_URL and HORIZON_PATH, preventing 404 errors and enhancing compatibility for users with custom URL setups.

[taylorotwell]

No easily reproducible example given.

[AbuHuraira191]

I was facing the same issue and I had to mention my suffix everytime in app.js
here is what I have to do
window.Horizon.basePath="/l/"+window.Horizon.path;
my app URL is
APP_URL="https://my.app.com/l"
and I mentioned
HORIZON_PATH="horizon"
it was giving me 404
before implementing this change
window.Horizon.basePath="/l/"+window.Horizon.path;