feat: REV-003 — stagger slide/fade animations on review list

lib/features/reviews/widgets/review_section.dart

@@ -1,5 +1,6 @@
 // lib/features/reviews/widgets/review_section.dart
 import 'package:flutter/material.dart';
+import 'package:flutter_staggered_animations/flutter_staggered_animations.dart';
 import '../../../core/storage/token_storage.dart';
 import '../../../core/utils/error_utils.dart';
 import '../models/review_models.dart';
@@ -162,15 +163,26 @@ class _ReviewSectionState extends State<ReviewSection> {
             )
           else ...[
             const SizedBox(height: 12),
-            ...List.generate(_reviews.length, (i) => Padding(
-              padding: const EdgeInsets.only(bottom: 12),
-              child: ReviewCard(
-                review: _reviews[i],
-                currentUsername: _currentUsername,
-                onHelpful: _handleHelpful,
-                onFlag: _handleFlag,
+            AnimationLimiter(
+              child: Column(
+                children: AnimationConfiguration.toStaggeredList(
+                  duration: const Duration(milliseconds: 375),
+                  childAnimationBuilder: (widget) => SlideAnimation(
+                    verticalOffset: 50.0,
+                    child: FadeInAnimation(child: widget),
+                  ),
+                  children: List.generate(_reviews.length, (i) => Padding(
+                    padding: const EdgeInsets.only(bottom: 12),
+                    child: ReviewCard(
+                      review: _reviews[i],
+                      currentUsername: _currentUsername,
+                      onHelpful: _handleHelpful,
+                      onFlag: _handleFlag,
+                    ),
+                  )),
+                ),
               ),
-            )),
+            ),
           ],
 
           // Load more