fix(mobile): don't block startup when offline (#32652)

* fix(mobile): don't block startup when offline

* chore: implement suggestions

---------

Co-authored-by: Santo Shakil <santoshakil@users.noreply.github.com>
(cherry picked from commit 32b137ab3713545324873f552adb51b9ef2aecde)

mobile/lib/pages/common/splash_screen.page.dart

@@ -299,7 +299,7 @@ class SplashScreenPageState extends ConsumerState<SplashScreenPage> {
   @override
   void initState() {
     super.initState();
-    unawaited(ref.read(authProvider.notifier).setOpenApiServiceEndpoint().whenComplete(() => resumeSession()));
+    unawaited(resumeSession());
   }
 
   Future<void> resumeSession() async {
@@ -314,13 +314,28 @@ class SplashScreenPageState extends ConsumerState<SplashScreenPage> {
       final backupNotifier = ref.read(backupProvider.notifier);
       final lifeCycle = ref.read(appStateProvider.notifier);
       final viewIntentHandler = ref.read(viewIntentHandlerProvider);
+      final authNotifier = ref.read(authProvider.notifier);
 
       unawaited(
-        ref
-            .read(authProvider.notifier)
-            .saveAuthInfo(accessToken: accessToken)
+        authNotifier
+            .setOpenApiServiceEndpoint()
+            .catchError((Object error, StackTrace stackTrace) {
+              log.warning('Failed to resolve server endpoint', error, stackTrace);
+              return null;
+            })
+            .then((_) async {
+              if (Store.tryGet(StoreKey.accessToken) != accessToken) {
+                return false;
+              }
+              await authNotifier.saveAuthInfo(accessToken: accessToken);
+              return true;
+            })
             .then(
-              (_) async {
+              (sessionResumed) async {
+                if (!sessionResumed) {
+                  return;
+                }
+
                 try {
                   wsProvider.connect();
                   unawaited(infoProvider.getServerInfo());

mobile/lib/services/api.service.dart

@@ -115,9 +115,11 @@ class ApiService {
   Future<bool> _isEndpointAvailable(String serverUrl) async {
     final endpoint = serverUrl.endsWith('/api') ? serverUrl : '$serverUrl/api';
 
+    // Probe with a throwaway client so the shared client keeps pointing at the active endpoint
+    final probeClient = ApiClient(basePath: endpoint)..client = NetworkRepository.client;
+
     try {
-      setEndpoint(endpoint);
-      await serverInfoApi.pingServer().timeout(const Duration(seconds: 5));
+      await ServerApi(probeClient).pingServer().timeout(const Duration(seconds: 5));
     } on TimeoutException catch (_) {
       return false;
     } on SocketException catch (_) {