?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
return new class extends Migration {
    public function up(): void {
        Schema::create('ticket_replies', function (Blueprint $table) {
            $table->id();
            $table->foreignId('ticket_id')->constrained()->cascadeOnDelete()->index();
            $table->foreignId('author_user_id')->nullable()->constrained('users')->nullOnDelete();
            $table->string('author_type')->default('staff'); // staff|customer|system
            $table->text('body');
            $table->string('visibility')->default('public'); // public|internal
            $table->json('attachments')->nullable();
            $table->timestamps();
        });
    }
    public function down(): void { Schema::dropIfExists('ticket_replies'); }
};