[#16] implement Refresh survey

Author: nkhanh44

lib/screens/home/home_screen.dart

@@ -68,29 +68,39 @@ class _HomeScreenState extends ConsumerState<HomeScreen> {
       );
     }
     return Scaffold(
-      body: Stack(
-        children: [
-          if (surveys.isNotEmpty) ...[
-            HomePagesWidget(
-              surveys: surveys,
-              currentPage: _currentPage,
-            ),
-            const HomeHeaderWidget(),
-            Align(
-              alignment: Alignment.bottomCenter,
-              child: Padding(
-                padding: const EdgeInsets.only(bottom: 220),
-                child: HomePageIndicatorWidget(
-                  surveysLength: surveys.length,
+        body: RefreshIndicator(
+      color: Colors.white,
+      backgroundColor: Colors.black,
+      onRefresh:() => ref.read(homeViewModelProvider.notifier).loadSurveys(isRefreshing: true),
+      child: SingleChildScrollView(
+        physics: const AlwaysScrollableScrollPhysics(),
+        child: SizedBox(
+          height: MediaQuery.of(context).size.height,
+          child: Stack(
+            children: [
+              if (surveys.isNotEmpty) ...[
+                HomePagesWidget(
+                  surveys: surveys,
                   currentPage: _currentPage,
                 ),
-              ),
-            )
-          ],
-          if (surveys.isEmpty || isLoading) _buildShimmerLoading(),
-        ],
+                const HomeHeaderWidget(),
+                Align(
+                  alignment: Alignment.bottomCenter,
+                  child: Padding(
+                    padding: const EdgeInsets.only(bottom: 220),
+                    child: HomePageIndicatorWidget(
+                        surveysLength: surveys.length,
+                        currentPage: _currentPage,
+                        ),
+                  ),
+                )
+              ],
+              if (surveys.isEmpty || isLoading) _buildShimmerLoading(),
+            ],
+          ),
+        ),
       ),
-    );
+    ));
   }
 
   Widget _buildShimmerLoading() {