feature(mobile): Hardening synchronization mechanism + Pull to refresh (#2085)

* fix(mobile): allow syncing duplicate local IDs

* enable to run isar unit tests on CI

* serialize sync operations, add pull to refresh on timeline

---------

Co-authored-by: Fynn Petersen-Frey <zoodyy@users.noreply.github.com>

mobile/lib/modules/home/views/home_page.dart

@@ -43,6 +43,7 @@ class HomePage extends HookConsumerWidget {
     final albumService = ref.watch(albumServiceProvider);
 
     final tipOneOpacity = useState(0.0);
+    final refreshCount = useState(0);
 
     useEffect(
       () {
@@ -182,6 +183,22 @@ class HomePage extends HookConsumerWidget {
         }
       }
 
+      Future<void> refreshAssets() async {
+        debugPrint("refreshCount.value ${refreshCount.value}");
+        final fullRefresh = refreshCount.value > 0;
+        await ref.read(assetProvider.notifier).getAllAsset(clear: fullRefresh);
+        if (fullRefresh) {
+          // refresh was forced: user requested another refresh within 2 seconds
+          refreshCount.value = 0;
+        } else {
+          refreshCount.value++;
+          // set counter back to 0 if user does not request refresh again
+          Timer(const Duration(seconds: 2), () {
+            refreshCount.value = 0;
+          });
+        }
+      }
+
       buildLoadingIndicator() {
         Timer(const Duration(seconds: 2), () {
           tipOneOpacity.value = 1;
@@ -241,6 +258,7 @@ class HomePage extends HookConsumerWidget {
                         .getSetting(AppSettingsEnum.storageIndicator),
                     listener: selectionListener,
                     selectionActive: selectionEnabledHook.value,
+                    onRefresh: refreshAssets,
                   ),
             if (selectionEnabledHook.value)
               SafeArea(