Upgrading to Laravel 12 with Nova 4 installed fails

[tmannherz]

• Laravel Version: 11x -> 12.x
• Nova Version: 4.x
• PHP Version: 8.3.19
• Database Driver & Version: n/a
• Operating System and Version: n/a
• Browser type and version: n/a
• Reproduction Repository: n/a

Description:

Attempting to upgrade to Laravel 12 with Nova 4 installed fails.

Detailed steps to reproduce the issue on a fresh Nova installation:

1. Set up a Laravel + Nova project with Laravel 11 and Nova 4:

{
    "name": "repo/nova-upgrade",
    "type": "project",
    "description": "Nova Upgrade",
    "require": {
        "laravel/framework": "^11",
        "laravel/nova": "^4"
    },
    "repositories": [
        {
            "type": "composer",
            "url": "https://nova.laravel.com"
        }
    ]
}

2. Run composer i -- install is successful
3. Update the laravel/framework version requirement to ^12 and run composer upgrade laravel/framework
4. Installs fails with this message:

composer upgrade laravel/framework
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires laravel/framework ^12, found laravel/framework[v12.0.0, ..., v12.8.1] but these were not loaded, likely because it conflicts with another require.
  Problem 2
    - laravel/nova is locked to version 4.35.8 and an update of this package was not requested.
    - inertiajs/inertia-laravel v1.3.2 requires laravel/framework ^8.74|^9.0|^10.0|^11.0 -> found laravel/framework[v8.74.0, ..., v8.83.29, v9.0.0, ..., v9.52.20, v10.0.0, ..., v10.48.29, v11.0.0, ..., v11.44.2] but it conflicts with your root composer.json require (^12).
    - laravel/nova 4.35.8 requires inertiajs/inertia-laravel ^0.4.5|^0.5.2|^0.6.0|^1.0 -> satisfiable by inertiajs/inertia-laravel[v1.3.2].

One of the Nova dependencies, inertiajs/inertia-laravel, is not yet compatible.
Here's a related ticket, but it's not getting any attention and until it does, the Laravel upgrade path is blocked.
Looking at inertiajs/inertia-laravel, it's already L12 compatible. The maintainers just need to tag a new 1.x release.

[crynobone]

Ping @joetannenbaum

Laravel Nova 4 allows Laravel Framework 12 but we don't officially support it as v4 is now only on security releases. Upgrade to Laravel Nova 5 to get official Framework 12 supports.