Update Sổ Bán Lẻ order status to paid after successful epay IPN

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017KPzWwuTEeX2vXGXvyGn4q

app/controllers/admin.server.controller.js

@@ -213,6 +213,18 @@ exports.epayIPN = function (req, res) {
           console.error("epayIPN: DB error updating merTrxId=" + merTrxId + ":", updateErr.message);
           return res.status(500).json({ code: "99", data: "DB_ERROR" });
         }
+
+        if (newStatus === "success" && tx.sobanleOrderId) {
+          SobanleClient.changeSaleStatus(tx.sobanleOrderId, function (sobanleErr) {
+            if (sobanleErr) {
+              console.error(
+                "epayIPN: SobanleClient.changeSaleStatus failed for orderId=" + tx.sobanleOrderId + ":",
+                sobanleErr.message
+              );
+            }
+          });
+        }
+
         return res.status(200).json({ code: "00", data: "Success" });
       }
     );