Seed DemoWorld staff and customer continuity for POS demo data

Replace ad-hoc demo-cashier-{id} accounts with DemoWorld staff who hold
a pos role, mirrored locally by email until SSO remaps to public_id.
Sales for the first named customers now use DemoWorld people (name +
phone) instead of generic "Cash Customer N" labels, and staff logins
skip the login reseed so mid-demo state survives.

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

tests/Feature/DemoSeedCommandTest.php

@@ -4,6 +4,7 @@ namespace Tests\Feature;
 
 use App\Models\Pos\ProSubscription;
 use App\Models\PosLocation;
+use App\Models\PosMember;
 use App\Models\PosProduct;
 use App\Models\PosSale;
 use App\Models\User;
@@ -104,4 +105,28 @@ class DemoSeedCommandTest extends TestCase
         $this->assertSame($products, PosProduct::owned($user->public_id)->count());
         $this->assertSame($sales, PosSale::owned($user->public_id)->count());
     }
+
+    public function test_pro_seed_provisions_demo_world_cashier_and_named_customer(): void
+    {
+        $user = User::create([
+            'public_id' => 'demo-pos-pro-staff',
+            'name' => 'Demo Pro',
+            'email' => 'demo-pro@ladill.com',
+            'password' => bcrypt('password'),
+        ]);
+
+        Artisan::call('demo:seed', ['identity' => $user->email, '--plan' => 'pro']);
+
+        $this->assertDatabaseHas('users', ['email' => 'demo-pro-cashier@ladill.com']);
+        $this->assertTrue(
+            PosMember::owned($user->public_id)
+                ->where('user_ref', 'demo-pro-cashier@ladill.com')
+                ->where('role', PosMember::ROLE_CASHIER)
+                ->exists()
+        );
+
+        $this->assertTrue(
+            PosSale::owned($user->public_id)->where('customer_name', 'Ama Mensah')->exists()
+        );
+    }
 }