Frame POS checkout sheet for till operators.

Use operator-facing copy and merchant email so Card/MoMo checkout is for staff handing the screen to a customer, not self-serve buyers.

app/Http/Controllers/Pos/RegisterController.php

@@ -186,7 +186,7 @@ class RegisterController extends Controller
             return redirect()
                 ->route('pos.sales.show', $sale)
                 ->with('checkout_url', $result['checkout_url'])
-                ->with('success', 'Complete the payment to finish this sale.');
+                ->with('success', 'Payment sheet ready — hand the device to the customer for card or MoMo.');
         } catch (RuntimeException $e) {
             return back()->withInput()->with('error', $e->getMessage());
         }

app/Http/Controllers/Pos/TicketController.php

@@ -237,7 +237,7 @@ class TicketController extends Controller
             return redirect()
                 ->route('pos.tickets.show', $sale)
                 ->with('checkout_url', $result['checkout_url'])
-                ->with('success', 'Complete the payment to settle this ticket.');
+                ->with('success', 'Payment sheet ready — hand the device to the customer for card or MoMo.');
         } catch (RuntimeException $e) {
             return back()->with('error', $e->getMessage());
         }

app/Services/Pos/PosSaleService.php

@@ -300,15 +300,22 @@ class PosSaleService
             'status' => PosPayment::STATUS_PENDING,
         ]);
 
+        // Till-operator checkout: gateways require an email; use the merchant
+        // account (not a walk-up customer) so the register can complete Card/MoMo.
+        $operatorEmail = trim((string) ($merchant->email ?? ''));
+        if ($operatorEmail === '' || ! str_contains($operatorEmail, '@')) {
+            $operatorEmail = 'seller+'.($merchant->public_id ?? 'pos').'@checkout.ladill.local';
+        }
+
         $reference = 'POSP-'.strtoupper(Str::random(16));
         $checkout = $this->gateway->initializeCheckout(
             $merchant,
             $amount,
             (string) ($sale->currency ?? 'GHS'),
-            (string) (trim((string) ($merchant->email ?? '')) !== '' ? $merchant->email : ('seller+'.($merchant->public_id ?? 'pos').'@checkout.ladill.local')),
+            $operatorEmail,
             route('pos.payments.callback'),
             $reference,
-            ['title' => 'Ticket '.$sale->reference.' payment', 'pos_sale_id' => $sale->id, 'pos_payment_id' => $payment->id],
+            ['title' => 'Ticket '.$sale->reference.' payment', 'pos_sale_id' => $sale->id, 'pos_payment_id' => $payment->id, 'channel' => 'pos_till'],
         );
 
         $payment->forceFill([
@@ -502,14 +509,20 @@ class PosSaleService
             $amount = (int) $sale->total_minor;
         }
 
+        // Till-operator checkout: use merchant email (register staff), not a guest.
+        $operatorEmail = trim((string) ($merchant->email ?? ''));
+        if ($operatorEmail === '' || ! str_contains($operatorEmail, '@')) {
+            $operatorEmail = 'seller+'.($merchant->public_id ?? 'pos').'@checkout.ladill.local';
+        }
+
         $checkout = $this->gateway->initializeCheckout(
             $merchant,
             $amount,
             (string) ($sale->currency ?? 'GHS'),
-            (string) (trim((string) ($merchant->email ?? '')) !== '' ? $merchant->email : ('seller+'.($merchant->public_id ?? 'pos').'@checkout.ladill.local')),
+            $operatorEmail,
             $callbackUrl,
             $reference,
-            ['title' => 'POS '.$sale->reference, 'pos_sale_id' => $sale->id, 'pos_reference' => $sale->reference],
+            ['title' => 'POS '.$sale->reference, 'pos_sale_id' => $sale->id, 'pos_reference' => $sale->reference, 'channel' => 'pos_till'],
         );
 
         $checkoutUrl = $checkout['checkout_url'];