로그인 화면 플랫 UI 수정

userfront/lib/core/theme/theme_controller.dart

@@ -2,10 +2,15 @@ import 'package:flutter/material.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 class ThemeController extends ValueNotifier<ThemeMode> {
-  ThemeController._() : super(ThemeMode.light);
+  ThemeController._(this.storageKey) : super(ThemeMode.light);
 
-  static const storageKey = 'userfront_theme';
-  static final ThemeController instance = ThemeController._();
+  static const appStorageKey = 'userfront_theme';
+  static const authStorageKey = 'userfront_auth_theme';
+  static final ThemeController app = ThemeController._(appStorageKey);
+  static final ThemeController auth = ThemeController._(authStorageKey);
+  static final ThemeController instance = app;
+
+  final String storageKey;
 
   bool get isDark => value == ThemeMode.dark;
 

userfront/lib/core/theme/theme_scope.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/material.dart';
+
+import 'app_theme.dart';
+import 'theme_controller.dart';
+
+class ThemeScope extends InheritedWidget {
+  const ThemeScope({super.key, required this.controller, required Widget child})
+    : super(child: child);
+
+  final ThemeController controller;
+
+  static ThemeController of(BuildContext context) {
+    final scope = context.dependOnInheritedWidgetOfExactType<ThemeScope>();
+    return scope?.controller ?? ThemeController.app;
+  }
+
+  @override
+  bool updateShouldNotify(ThemeScope oldWidget) {
+    return oldWidget.controller != controller;
+  }
+}
+
+class ScopedTheme extends StatelessWidget {
+  const ScopedTheme({super.key, required this.controller, required this.child});
+
+  final ThemeController controller;
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    return ThemeScope(
+      controller: controller,
+      child: ValueListenableBuilder<ThemeMode>(
+        valueListenable: controller,
+        builder: (context, mode, _) {
+          return Theme(
+            data: mode == ThemeMode.dark ? buildDarkTheme() : buildLightTheme(),
+            child: child,
+          );
+        },
+      ),
+    );
+  }
+}