fix: Improve receiving shares

lib/routes/routes.dart

@@ -21,4 +21,6 @@ class R {
   static const linkedDocuments = "linkedDocuments";
   static const bulkEditDocuments = "bulkEditDocuments";
   static const uploadQueue = "uploadQueue";
+  static const checkingLogin = "checkingLogin";
+  static const loggingOut = "loggingOut";
 }

lib/routes/typed/shells/provider_shell_route.dart

@@ -61,11 +61,15 @@ class ProviderShellRoute extends ShellRouteData {
   ) {
     final currentUserId = Hive.box<GlobalSettings>(HiveBoxes.globalSettings)
         .getValue()!
-        .loggedInUserId!;
+        .loggedInUserId;
+    if (currentUserId == null) {
+      return const SizedBox.shrink();
+    }
     final authenticatedUser =
         Hive.box<LocalUserAccount>(HiveBoxes.localUserAccount).get(
       currentUserId,
     )!;
+
     return HomeShellWidget(
       localUserId: authenticatedUser.id,
       paperlessApiVersion: authenticatedUser.apiVersion,

lib/routes/typed/top_level/checking_login_route.dart

@@ -0,0 +1,23 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:paperless_mobile/routes/routes.dart';
+
+part 'checking_login_route.g.dart';
+
+@TypedGoRoute<CheckingLoginRoute>(
+  path: "/checking-login",
+  name: R.checkingLogin,
+)
+class CheckingLoginRoute extends GoRouteData {
+  const CheckingLoginRoute();
+  @override
+  Widget build(BuildContext context, GoRouterState state) {
+    return Scaffold(
+      body: Center(
+        child: Text("Logging in..."),
+      ),
+    );
+  }
+}

lib/routes/typed/top_level/logging_out_route.dart

@@ -0,0 +1,23 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:paperless_mobile/routes/routes.dart';
+
+part 'logging_out_route.g.dart';
+
+@TypedGoRoute<LogginOutRoute>(
+  path: "/logging-out",
+  name: R.loggingOut,
+)
+class LogginOutRoute extends GoRouteData {
+  const LogginOutRoute();
+  @override
+  Widget build(BuildContext context, GoRouterState state) {
+    return Scaffold(
+      body: Center(
+        child: Text("Logging out..."),
+      ),
+    );
+  }
+}