feat: add getter and setter for _code_activated_coupon_ids to PosOrder model

static/src/app/pos_loyalty_safe_coupon_patch.js

@@ -52,6 +52,22 @@ patch(PosOrderline.prototype, {
 // ─── PosOrder patches ─────────────────────────────────────────────────────────
 
 patch(PosOrder.prototype, {
+    get _code_activated_coupon_ids() {
+        const ids = this.raw._code_activated_coupon_ids || [];
+        const result = [];
+        for (const id of ids) {
+            const coupon = this.models["loyalty.card"].get(id);
+            if (coupon && coupon.program_id) {
+                result.push(coupon);
+            }
+        }
+        return result;
+    },
+
+    set _code_activated_coupon_ids(values) {
+        this.update({ _code_activated_coupon_ids: values });
+    },
+
     /**
      * getLoyaltyPoints reads coupon_id.id — guard undefined coupon_id.
      */