userfront 로그인 후 /dashboard로 이동하게 변경

userfront/lib/core/i18n/locale_gate.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:easy_localization/easy_localization.dart' hide tr;
 import 'package:flutter/material.dart';
 
@@ -17,28 +19,54 @@ class LocaleGate extends StatefulWidget {
 }
 
 class _LocaleGateState extends State<LocaleGate> {
+  bool _syncScheduled = false;
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    _applyLocale();
+    _scheduleLocaleSync();
   }
 
   @override
   void didUpdateWidget(LocaleGate oldWidget) {
     super.didUpdateWidget(oldWidget);
     if (oldWidget.localeCode != widget.localeCode) {
-      _applyLocale();
+      _scheduleLocaleSync();
     }
   }
 
-  Future<void> _applyLocale() async {
-    final normalized = normalizeLocaleCode(widget.localeCode);
-    LocaleStorage.write(normalized);
-    webWindow.setTitle(tr('ui.userfront.app_title'));
-    if (context.locale.languageCode == normalized) {
+  void _scheduleLocaleSync() {
+    if (_syncScheduled) {
+      return;
+    }
+    _syncScheduled = true;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _syncScheduled = false;
+      if (!mounted) {
+        return;
+      }
+      unawaited(_applyLocale());
+    });
+  }
+
+  Future<void> _applyLocale() async {
+    if (!mounted) {
+      return;
+    }
+    final normalized = normalizeLocaleCode(widget.localeCode);
+    LocaleStorage.write(normalized);
+    final localization = EasyLocalization.of(context);
+    if (localization == null) {
+      return;
+    }
+    if (localization.currentLocale?.languageCode == normalized) {
+      webWindow.setTitle(tr('ui.userfront.app_title'));
+      return;
+    }
+    await localization.setLocale(Locale(normalized));
+    if (!mounted) {
       return;
     }
-    await context.setLocale(Locale(normalized));
     webWindow.setTitle(tr('ui.userfront.app_title'));
   }