update text + slider

lib/features/home/presentation/widgets/promotion_slider.dart

@@ -1,9 +1,12 @@
 /// Widget: Promotion Slider
 ///
-/// Horizontal scrolling list of promotional banners.
+/// Auto-sliding carousel of promotional banners.
 /// Displays promotion images, titles, and descriptions.
+/// Auto-advances every 4 seconds with smooth animation.
 library;
 
+import 'dart:async';
+
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
@@ -14,13 +17,15 @@ import 'package:worker/features/home/domain/entities/promotion.dart';
 
 /// Promotion Slider Widget
 ///
-/// Displays a horizontal scrollable list of promotion cards.
+/// Displays an auto-sliding carousel of promotion cards.
 /// Each card shows an image, title, and brief description.
-class PromotionSlider extends StatelessWidget {
+/// Auto-advances every 4 seconds with page indicators.
+class PromotionSlider extends StatefulWidget {
   const PromotionSlider({
     super.key,
     required this.promotions,
     this.onPromotionTap,
+    this.autoSlideDuration = const Duration(seconds: 4),
   });
 
   /// List of promotions to display
@@ -29,9 +34,56 @@ class PromotionSlider extends StatelessWidget {
   /// Callback when a promotion is tapped
   final void Function(Promotion promotion)? onPromotionTap;
 
+  /// Duration between auto-slides
+  final Duration autoSlideDuration;
+
+  @override
+  State<PromotionSlider> createState() => _PromotionSliderState();
+}
+
+class _PromotionSliderState extends State<PromotionSlider> {
+  late final ScrollController _scrollController;
+  Timer? _autoSlideTimer;
+  int _currentIndex = 0;
+
+  static const double _cardWidth = 280;
+  static const double _cardMargin = 12;
+  static const double _scrollOffset = _cardWidth + _cardMargin;
+
+  @override
+  void initState() {
+    super.initState();
+    _scrollController = ScrollController();
+    _startAutoSlide();
+  }
+
+  @override
+  void dispose() {
+    _autoSlideTimer?.cancel();
+    _scrollController.dispose();
+    super.dispose();
+  }
+
+  void _startAutoSlide() {
+    if (widget.promotions.length <= 1) return;
+
+    _autoSlideTimer = Timer.periodic(widget.autoSlideDuration, (_) {
+      if (!mounted) return;
+
+      _currentIndex = (_currentIndex + 1) % widget.promotions.length;
+      final targetOffset = _currentIndex * _scrollOffset;
+
+      _scrollController.animateTo(
+        targetOffset,
+        duration: const Duration(milliseconds: 400),
+        curve: Curves.easeInOut,
+      );
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
-    if (promotions.isEmpty) {
+    if (widget.promotions.isEmpty) {
       return const SizedBox.shrink();
     }
 
@@ -45,7 +97,7 @@ class PromotionSlider extends StatelessWidget {
           Padding(
             padding: const EdgeInsets.symmetric(horizontal: 16),
             child: Text(
-              'Chương trình ưu đãi',
+              'Tin tức nổi bật',
               style: TextStyle(
                 fontSize: 16,
                 fontWeight: FontWeight.w700,
@@ -55,22 +107,22 @@ class PromotionSlider extends StatelessWidget {
           ),
           const SizedBox(height: 12),
           SizedBox(
-            height: 210, // 140px image + 54px text area
+            height: 210,
             child: ListView.builder(
+              controller: _scrollController,
               scrollDirection: Axis.horizontal,
               padding: const EdgeInsets.symmetric(horizontal: 16),
-              itemCount: promotions.length,
+              itemCount: widget.promotions.length,
               itemBuilder: (context, index) {
                 return _PromotionCard(
-                  promotion: promotions[index],
+                  promotion: widget.promotions[index],
                   onTap: () {
-                    if (onPromotionTap != null) {
-                      onPromotionTap!(promotions[index]);
+                    if (widget.onPromotionTap != null) {
+                      widget.onPromotionTap!(widget.promotions[index]);
                     } else {
-                      // Navigate to promotion detail page
                       context.pushNamed(
                         RouteNames.promotionDetail,
-                        extra: promotions[index],
+                        extra: widget.promotions[index],
                       );
                     }
                   },