Embed POS checkouts in a modal/sheet using the seller email.

Card/MoMo always initializes with the merchant email, and Paystack/Flutterwave/Hubtel open in-page (desktop modal, mobile bottomsheet) instead of a full redirect.

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

app/Http/Controllers/Pos/SaleController.php

@@ -82,22 +82,34 @@ class SaleController extends Controller
         return redirect()->route('pos.sales.index')->with('success', 'Sale deleted.');
     }
 
-    public function callback(Request $request, PosSale $sale): RedirectResponse
+    public function callback(Request $request, PosSale $sale): RedirectResponse|View
     {
         $reference = trim((string) $request->query('reference', $sale->payment_reference ?? ''));
 
         if ($reference === '') {
-            return redirect()->route('pos.sales.show', $sale)->with('error', 'Missing payment reference.');
+            return $this->paymentReturn(route('pos.sales.show', $sale), error: 'Missing payment reference.');
         }
 
         try {
             $sale = $this->sales->completePayCheckout($reference);
         } catch (RuntimeException $e) {
-            return redirect()->route('pos.sales.show', $sale)->with('error', $e->getMessage());
+            return $this->paymentReturn(route('pos.sales.show', $sale), error: $e->getMessage());
         }
 
-        return redirect()
-            ->route('pos.sales.show', $sale)
-            ->with('success', 'Payment received.');
+        return $this->paymentReturn(route('pos.sales.show', $sale), success: 'Payment received.');
+    }
+
+    private function paymentReturn(string $url, ?string $success = null, ?string $error = null): View
+    {
+        if ($success) {
+            session()->flash('success', $success);
+        }
+        if ($error) {
+            session()->flash('error', $error);
+        }
+
+        return view('pos.payment-return', [
+            'redirect' => $url,
+        ]);
     }
 }