Extract Ladill QR Plus as standalone app at qr.ladill.com.

Utility QR types only (URL, WiFi, link list, business, app download) with
SSO, Billing API integration, public /q resolver, and qr-plus:import for
platform migration. vCard and commerce types stay on the platform.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/User.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Models;
+
+use Database\Factories\UserFactory;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Foundation\Auth\User as Authenticatable;
+use Illuminate\Notifications\Notifiable;
+use Laravel\Sanctum\HasApiTokens;
+
+/**
+ * Thin local mirror of the platform identity (auth.ladill.com owns users).
+ */
+class User extends Authenticatable
+{
+    /** @use HasFactory<UserFactory> */
+    use HasApiTokens, HasFactory, Notifiable;
+
+    protected $fillable = ['public_id', 'name', 'email', 'avatar_url', 'password'];
+
+    protected $hidden = ['password', 'remember_token'];
+
+    protected function casts(): array
+    {
+        return ['email_verified_at' => 'datetime', 'password' => 'hashed'];
+    }
+
+    public function qrWallet(): HasOne
+    {
+        return $this->hasOne(QrWallet::class);
+    }
+
+    public function qrCodes(): HasMany
+    {
+        return $this->hasMany(QrCode::class);
+    }
+
+    public function getOrCreateQrWallet(): QrWallet
+    {
+        return $this->qrWallet()->firstOrCreate(
+            [],
+            ['credit_balance' => 0, 'qr_codes_total' => 0, 'scans_total' => 0, 'status' => QrWallet::STATUS_ACTIVE],
+        );
+    }
+}