Email digital receipts, add promo settings, and apply tips at charge.

Send real receipt emails from the customer display and sale page, store
branch promo content for the idle screen, and fold selected tips into totals.

app/Http/Controllers/Public/CustomerDisplayController.php

@@ -4,15 +4,21 @@ namespace App\Http\Controllers\Public;
 
 use App\Http\Controllers\Controller;
 use App\Models\PosCustomerDisplay;
+use App\Models\PosSale;
 use App\Services\Pos\CustomerDisplayService;
+use App\Services\Pos\ReceiptEmailService;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\View\View;
+use RuntimeException;
 use Symfony\Component\HttpFoundation\StreamedResponse;
 
 class CustomerDisplayController extends Controller
 {
-    public function __construct(private CustomerDisplayService $displays) {}
+    public function __construct(
+        private CustomerDisplayService $displays,
+        private ReceiptEmailService $receiptEmail,
+    ) {}
 
     public function show(string $token): View
     {
@@ -122,6 +128,9 @@ class CustomerDisplayController extends Controller
 
         if ($data['type'] === 'receipt_email') {
             $action['email'] = $data['email'] ?? null;
+            $emailResult = $this->emailReceiptForDisplay($display, (string) ($data['email'] ?? ''));
+            $action['email_sent'] = $emailResult['ok'];
+            $action['email_message'] = $emailResult['message'];
         }
 
         if ($data['type'] === 'payment_option') {
@@ -133,9 +142,43 @@ class CustomerDisplayController extends Controller
         return response()->json([
             'ok' => true,
             'state' => $this->displays->publicState($display->fresh()),
+            'email_sent' => $action['email_sent'] ?? null,
+            'message' => $action['email_message'] ?? null,
         ]);
     }
 
+    /** @return array{ok: bool, message: string} */
+    private function emailReceiptForDisplay(PosCustomerDisplay $display, string $email): array
+    {
+        $payload = is_array($display->payload) ? $display->payload : [];
+        $saleId = (int) ($payload['sale_id'] ?? $payload['receipt']['sale_id'] ?? 0);
+        $reference = (string) ($payload['sale_reference'] ?? $payload['receipt']['reference'] ?? '');
+
+        $sale = null;
+        if ($saleId > 0) {
+            $sale = PosSale::query()
+                ->where('id', $saleId)
+                ->where('location_id', $display->location_id)
+                ->first();
+        }
+        if (! $sale && $reference !== '') {
+            $sale = PosSale::query()
+                ->where('reference', $reference)
+                ->where('location_id', $display->location_id)
+                ->first();
+        }
+
+        if (! $sale) {
+            return ['ok' => false, 'message' => 'No receipt is ready to email yet.'];
+        }
+
+        try {
+            return $this->receiptEmail->send($sale, $email);
+        } catch (RuntimeException $e) {
+            return ['ok' => false, 'message' => $e->getMessage()];
+        }
+    }
+
     private function find(string $token): PosCustomerDisplay
     {
         return PosCustomerDisplay::query()