Filament multi-tenancy with a team switcher menu

<?php

namespace App\Providers\Filament;

use App\Filament\Pages\Tenancy\RegisterTeam;
use App\Models\Team;
use Filament\Actions\Action;
use Filament\Panel;
use Filament\PanelProvider;

class AppPanelProvider extends PanelProvider
{
    public function panel(Panel $panel): Panel
    {
        return $panel
            ->id('app')
            ->path('app')
            ->login()
            // Every resource query is scoped to the current Team through this relation name.
            ->tenant(Team::class, slugAttribute: 'slug', ownershipRelationship: 'team')
            ->tenantRegistration(RegisterTeam::class)      // "Create team" in the switcher
            ->tenantMenu(true)
            ->tenantMenuItems([
                Action::make('team-settings')
                    ->label('Team settings')
                    ->icon('heroicon-o-cog-6-tooth')
                    ->url(fn (): string => route('filament.app.pages.team-settings', ['tenant' => filament()->getTenant()]))
                    ->visible(fn (): bool => auth()->user()->ownsTeam(filament()->getTenant())),
            ]);
    }
}

<?php

namespace App\Models\Concerns;

use App\Models\Team;
use Filament\Panel;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Support\Collection;

/**
 * Add to User and implement:
 *   Filament\Models\Contracts\HasTenants, Filament\Models\Contracts\HasDefaultTenant.
 * Requires a team_user pivot and a nullable users.current_team_id column.
 */
trait BelongsToTeams
{
    public function teams(): BelongsToMany
    {
        return $this->belongsToMany(Team::class)->withPivot('role');
    }

    /** What the switcher lists. */
    public function getTenants(Panel $panel): Collection
    {
        return $this->teams;
    }

    /** Called on every tenant URL: a guessed slug of someone else's team must fail. */
    public function canAccessTenant(Model $tenant): bool
    {
        return $this->teams()->whereKey($tenant->getKey())->exists();
    }

    /** Where to land after login: the last team used, else the first one. */
    public function getDefaultTenant(Panel $panel): ?Model
    {
        return $this->teams()->find($this->current_team_id) ?? $this->teams()->first();
    }

    public function ownsTeam(Team $team): bool
    {
        return $this->teams()->whereKey($team->getKey())->wherePivot('role', 'owner')->exists();
    }

    /** Hook this to the panel's tenant "booted" event or a middleware to remember the choice. */
    public function rememberTeam(Team $team): void
    {
        if ($this->current_team_id !== $team->getKey()) {
            $this->forceFill(['current_team_id' => $team->getKey()])->save();
        }
    }
}