Filament settings page backed by a key-value table

<?php

namespace App\Filament\Pages;

use App\Models\Setting;
use BackedEnum;
use Filament\Actions\Action;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Toggle;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use Filament\Schemas\Components\Actions;
use Filament\Schemas\Components\EmbeddedSchema;
use Filament\Schemas\Components\Form;
use Filament\Schemas\Components\Section;
use Filament\Schemas\Concerns\InteractsWithSchemas;
use Filament\Schemas\Contracts\HasSchemas;
use Filament\Schemas\Schema;
use Filament\Support\Icons\Heroicon;

class StoreSettings extends Page implements HasSchemas
{
    use InteractsWithSchemas;

    protected static string|BackedEnum|null $navigationIcon = Heroicon::OutlinedCog6Tooth;

    protected static ?string $navigationLabel = 'Store settings';

    /** @var array<string, mixed> */
    public ?array $data = [];

    public function mount(): void
    {
        $this->form->fill(Setting::allAsArray());
    }

    public function form(Schema $schema): Schema
    {
        return $schema
            ->statePath('data')
            ->components([
                Section::make('General')->columns(2)->schema([
                    TextInput::make('store_name')->required()->maxLength(80),
                    Select::make('currency')->options(['USD' => 'US dollar', 'EUR' => 'Euro', 'GBP' => 'Pound'])->required(),
                    TextInput::make('tax_rate')->numeric()->suffix('%')->minValue(0)->maxValue(50),
                    Toggle::make('maintenance_mode')->label('Show maintenance banner'),
                ]),
            ]);
    }

    public function content(Schema $schema): Schema
    {
        return $schema->components([
            Form::make([EmbeddedSchema::make('form')])
                ->livewireSubmitHandler('save')
                ->footer([Actions::make([
                    Action::make('save')->label('Save changes')->submit('save')->keyBindings(['mod+s']),
                ])]),
        ]);
    }

    public function save(): void
    {
        Setting::putMany($this->form->getState());

        Notification::make()->title('Settings saved')->success()->send();
    }
}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Cache;

/** Key-value settings: columns `key` (unique string) and `value` (json). */
class Setting extends Model
{
    protected $fillable = ['key', 'value'];

    protected $casts = ['value' => 'json'];

    public static function allAsArray(): array
    {
        return Cache::rememberForever('settings.all', fn () => static::query()->pluck('value', 'key')->all());
    }

    public static function get(string $key, mixed $default = null): mixed
    {
        return static::allAsArray()[$key] ?? $default;
    }

    public static function putMany(array $values): void
    {
        foreach ($values as $key => $value) {
            static::updateOrCreate(['key' => $key], ['value' => $value]);
        }

        Cache::forget('settings.all');
    }
}