Remove unused DetailDropDown and TenderDetailCard components to streamline codebase and improve maintainability. These components were previously disabled and retained for potential future use.

lib/views/tenders/widgets/main_tenders_slider.dart

@@ -35,7 +35,12 @@ class _MainTendersSliderState extends State<MainTendersSlider> {
   @override
   void initState() {
     super.initState();
-    _scrollController.addListener(_onScroll);
+    // The scroll controller is only attached to the desktop ListView, so only
+    // register the prefetch listener there. Mobile prefetching is driven by
+    // PageView's onPageChanged instead.
+    if (widget.isDesktop) {
+      _scrollController.addListener(_onScroll);
+    }
   }
 
   void _onScroll() {
@@ -140,6 +145,10 @@ class _MainTendersSliderState extends State<MainTendersSlider> {
         controller: pageController,
         itemCount: widget.tenders.length,
         onPageChanged: (index) {
+          // currentPage is still the previous page here; a forward swipe means
+          // the new (1-indexed) page is greater than the old one.
+          final bool isForwardSwipe = index + 1 > currentPage;
+
           setState(() {
             currentPage = index + 1;
           });
@@ -150,9 +159,12 @@ class _MainTendersSliderState extends State<MainTendersSlider> {
             viewModel.getTenderFeedback(id);
           }
 
-          // Infinite scroll: once we pass the halfway point of the loaded
-          // tenders, prefetch the next page in the background.
-          if (index >= (widget.tenders.length * _prefetchFraction).floor()) {
+          // Infinite scroll: once we swipe forward past the halfway point of the
+          // loaded tenders, prefetch the next page in the background. Skip
+          // back-swipes so we don't refetch while the user reviews earlier
+          // tenders.
+          if (isForwardSwipe &&
+              index >= (widget.tenders.length * _prefetchFraction).floor()) {
             _maybeLoadMore();
           }
         },