openArticle with matched couponset

@@ -553,10 +553,21 @@ import UIKit
             return
         }
         
-        // TODO: Implement article navigation
-        // This could navigate to a web view with article content, 
-        // or a dedicated article detail screen
-        print("TODO: Navigate to article: \(article._name) - \(article._id)")
+        // Try to match article's url_link with a couponset uuid
+        let urlLink = article._url_link
+        if !urlLink.isEmpty,
+        let matchedCouponSet = self.couponSets.first(where: { $0._uuid == urlLink }) {
+            // Bind merchant data if available
+            if matchedCouponSet._merchant == nil,
+            let merchant = self.merchants.first(where: { $0._uuid == matchedCouponSet._merchant_uuid }) {
+                matchedCouponSet._merchant = merchant
+            }
+            openCouponsetViewController(with: matchedCouponSet)
+            return
+        }
+        
+        // No matching couponset found
+        print("No matching couponset found for article: \(article._name) with url_link: \(article._url_link)")
     }
     
     private func openCouponViewController(with offer: OfferModel) {