Fix POS Paystack double modal and keep checkout in-app.

Pass access_code into the payment sheet, launch Paystack Inline only,
and hide Ladill chrome after Inline loads so register Card/MoMo shows
a single payment interface.

app/Http/Controllers/Pos/RegisterController.php

@@ -235,6 +235,7 @@ class RegisterController extends Controller
 
             $result = $this->sales->initiatePayCheckout($sale, $merchant);
             $checkoutUrl = $result['checkout_url'] ?? null;
+            $accessCode = $result['access_code'] ?? null;
 
             $this->customerDisplays->pushPayment($location, $sale->fresh(['lines']), [
                 'checkout_url' => $checkoutUrl,
@@ -246,6 +247,7 @@ class RegisterController extends Controller
             if ($request->expectsJson() || $request->ajax()) {
                 return response()->json([
                     'checkout_url' => $checkoutUrl,
+                    'access_code' => $accessCode,
                     'sale_id' => $sale->id,
                 ]);
             }
@@ -253,6 +255,7 @@ class RegisterController extends Controller
             return redirect()
                 ->route('pos.sales.show', $sale)
                 ->with('checkout_url', $checkoutUrl)
+                ->with('access_code', $accessCode)
                 ->with('success', 'Payment sheet ready — customer screen shows the QR; till sheet is for the operator.');
         } catch (RuntimeException $e) {
             return back()->withInput()->with('error', $e->getMessage());

app/Http/Controllers/Pos/TicketController.php

@@ -230,6 +230,7 @@ class TicketController extends Controller
             if ($request->expectsJson() || $request->ajax()) {
                 return response()->json([
                     'checkout_url' => $result['checkout_url'],
+                    'access_code' => $result['access_code'] ?? '',
                     'sale_id' => $sale->id,
                 ]);
             }
@@ -237,6 +238,7 @@ class TicketController extends Controller
             return redirect()
                 ->route('pos.tickets.show', $sale)
                 ->with('checkout_url', $result['checkout_url'])
+                ->with('access_code', $result['access_code'] ?? '')
                 ->with('success', 'Payment sheet ready — hand the device to the customer for card or MoMo.');
         } catch (RuntimeException $e) {
             return back()->with('error', $e->getMessage());