[auth] Register url scheme for macos (#2107)

## Description

## Tests

auth/lib/services/user_service.dart

@@ -267,31 +267,41 @@ class UserService {
   }
 
   Future<void> onPassKeyVerified(BuildContext context, Map response) async {
-    final userPassword = Configuration.instance.getVolatilePassword();
-    if (userPassword == null) throw Exception("volatile password is null");
+    final ProgressDialog dialog =
+        createProgressDialog(context, context.l10n.pleaseWait);
+    await dialog.show();
+    try {
+      final userPassword = _config.getVolatilePassword();
+      if (userPassword == null) throw Exception("volatile password is null");
 
-    await _saveConfiguration(response);
+      await _saveConfiguration(response);
 
-    Widget page;
-    if (Configuration.instance.getEncryptedToken() != null) {
-      await Configuration.instance.decryptSecretsAndGetKeyEncKey(
-        userPassword,
-        Configuration.instance.getKeyAttributes()!,
+      Widget page;
+      if (_config.getEncryptedToken() != null) {
+        await _config.decryptSecretsAndGetKeyEncKey(
+          userPassword,
+          _config.getKeyAttributes()!,
+        );
+        page = const HomePage();
+      } else {
+        throw Exception("unexpected response during passkey verification");
+      }
+      await dialog.hide();
+
+      // ignore: unawaited_futures
+      Navigator.of(context).pushAndRemoveUntil(
+        MaterialPageRoute(
+          builder: (BuildContext context) {
+            return page;
+          },
+        ),
+        (route) => route.isFirst,
       );
-      page = const HomePage();
-    } else {
-      throw Exception("unexpected response during passkey verification");
+    } catch (e) {
+      _logger.severe(e);
+      await dialog.hide();
+      rethrow;
     }
-
-    // ignore: unawaited_futures
-    Navigator.of(context).pushAndRemoveUntil(
-      MaterialPageRoute(
-        builder: (BuildContext context) {
-          return page;
-        },
-      ),
-      (route) => route.isFirst,
-    );
   }
 
   Future<void> verifyEmail(

auth/lib/ui/passkey_page.dart

@@ -8,6 +8,7 @@ import 'package:ente_auth/services/user_service.dart';
 import 'package:ente_auth/ui/components/buttons/button_widget.dart';
 import 'package:ente_auth/ui/components/models/button_type.dart';
 import 'package:ente_auth/utils/dialog_util.dart';
+import 'package:ente_auth/utils/toast_util.dart';
 import 'package:flutter/material.dart';
 import 'package:logging/logging.dart';
 import 'package:url_launcher/url_launcher_string.dart';
@@ -61,6 +62,11 @@ class _PasskeyPageState extends State<PasskeyPage> {
     }
     try {
       if (mounted && link.toLowerCase().startsWith("enteauth://passkey")) {
+        if (Configuration.instance.isLoggedIn()) {
+          _logger.info('ignored deeplink: already configured');
+          showToast(context, 'Account is already configured.');
+          return;
+        }
         final String? uri = Uri.parse(link).queryParameters['response'];
         String base64String = uri!.toString();
         while (base64String.length % 4 != 0) {

auth/macos/Runner/Info.plist

@@ -38,6 +38,7 @@
 			<key>CFBundleURLSchemes</key>
 			<array>
 				<string>otpauth</string>
+				<string>enteauth</string>
 			</array>
 		</dict>
 	</array>