Filament read-only activity log table with diff modal

<?php

namespace App\Filament\Resources\Activities;

use App\Filament\Resources\Activities\Pages\ListActivities;
use BackedEnum;
use Filament\Actions\ViewAction;
use Filament\Infolists\Components\KeyValueEntry;
use Filament\Infolists\Components\TextEntry;
use Filament\Resources\Resource;
use Filament\Support\Icons\Heroicon;
use Filament\Tables\Columns\TextColumn;
use Filament\Tables\Filters\SelectFilter;
use Filament\Tables\Table;
use Spatie\Activitylog\Models\Activity;

class ActivityResource extends Resource
{
    protected static ?string $model = Activity::class;

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

    protected static ?string $navigationLabel = 'Activity log';

    // Read-only: an audit trail must never be edited from the UI.
    public static function canCreate(): bool
    {
        return false;
    }

    public static function canEdit($record): bool
    {
        return false;
    }

    public static function canDelete($record): bool
    {
        return false;
    }

    public static function table(Table $table): Table
    {
        return $table
            ->defaultSort('created_at', 'desc')
            ->modifyQueryUsing(fn ($query) => $query->with(['causer', 'subject']))
            ->columns([
                TextColumn::make('created_at')->dateTime()->sortable(),
                TextColumn::make('causer.name')->placeholder('System')->searchable(),
                TextColumn::make('event')->badge()->color(fn (?string $state) => match ($state) {
                    'created' => 'success',
                    'deleted' => 'danger',
                    default => 'info',
                }),
                TextColumn::make('subject_type')
                    ->label('Record')
                    ->formatStateUsing(fn ($state, Activity $record) => class_basename($state).' #'.$record->subject_id),
                TextColumn::make('description')->limit(50)->searchable(),
            ])
            ->filters([
                SelectFilter::make('event')->options(['created' => 'Created', 'updated' => 'Updated', 'deleted' => 'Deleted']),
                SelectFilter::make('causer_id')->label('User')->relationship('causer', 'name')->searchable()->preload(),
            ])
            ->recordActions([
                ViewAction::make()->modalHeading('Change details')->schema([
                    TextEntry::make('description'),
                    KeyValueEntry::make('properties.old')->label('Before')->visible(fn ($record) => filled($record->properties['old'] ?? null)),
                    KeyValueEntry::make('properties.attributes')->label('After')->visible(fn ($record) => filled($record->properties['attributes'] ?? null)),
                ]),
            ]);
    }

    public static function getPages(): array
    {
        return ['index' => ListActivities::route('/')];
    }
}

<?php

namespace App\Filament\Resources\Activities\Pages;

use App\Filament\Resources\Activities\ActivityResource;
use Filament\Resources\Pages\ListRecords;

class ListActivities extends ListRecords
{
    protected static string $resource = ActivityResource::class;

    // No header actions: there is nothing to create in an audit log.
    protected function getHeaderActions(): array
    {
        return [];
    }
}