Add freemium plans, wallet-billed host notifications, and Pro upgrades.

Host alerts use email/phone on the host record without requiring a Ladill
account link; SMS and over-quota emails debit the org wallet at platform rates.

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

app/Http/Controllers/Frontdesk/DeviceController.php

@@ -61,6 +61,10 @@ class DeviceController extends Controller
             'reception_desk_id' => ['nullable', 'integer'],
         ]);
 
+        if ($validated['type'] === 'kiosk' && ! app(\App\Services\Frontdesk\PlanService::class)->canAddKiosk($organization)) {
+            return back()->withInput()->with('error', 'Your plan allows one kiosk device. Upgrade to Frontdesk Pro for unlimited kiosks.');
+        }
+
         $token = in_array($validated['type'], config('frontdesk.device_token_types', []), true)
             ? $devices->generateToken()
             : null;