add user migration

backend/database/Migration.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Database;
+
+use Illuminate\Database\Capsule\Manager as Capsule;
+use Illuminate\Database\Schema\Builder;
+
+abstract class Migration
+{
+    abstract public function up(): void;
+
+    abstract public function down(): void;
+
+    protected function schema(): Builder
+    {
+        return Capsule::schema();
+    }
+}

backend/database/UserModel.php

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+<?php
+
+namespace App\Database;
+
+use Illuminate\Database\Eloquent\Model;
+
+class UserModel extends Model
+{
+    protected $table = 'users';
+
+    public $timestamps = true;
+
+    protected $fillable = [
+        'email',
+        'password_hash',
+    ];
+
+    protected $casts = [
+        'id' => 'int',
+    ];
+}

backend/database/migrations/2026_05_17_000001_create_users_table.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Database\Migrations;
+
+use App\Database\Migration;
+use Illuminate\Database\Capsule\Manager as Capsule;
+
+class CreateUsersTable extends Migration
+{
+    public function up(): void
+    {
+        Capsule::schema()->create('users', function ($table) {
+            $table->increments('id');
+            $table->string('email', 255)->unique();
+            $table->string('password_hash', 255);
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Capsule::schema()->dropIfExists('users');
+    }
+}
+
+return CreateUsersTable::class;