make dev/dev-debug 구분.

userfront/lib/core/services/logger_service.dart

@@ -1,10 +1,10 @@
 import 'dart:convert';
 import 'package:flutter/foundation.dart';
-import 'package:flutter_dotenv/flutter_dotenv.dart';
 import 'package:logging/logging.dart' as std_log;
 import 'package:logger/logger.dart' as pretty_log;
 import 'auth_proxy_service.dart';
 import 'log_policy.dart';
+import 'runtime_env.dart';
 
 /// Global Logger Service for Baron SSO Frontend
 class LoggerService {
@@ -16,10 +16,10 @@ class LoggerService {
   late final String _productionDebugFlag;
 
   LoggerService._internal() {
-    _appEnv = _envOrDefault('APP_ENV', 'dev');
-    _productionDebugFlag = _envOrDefault(
+    _appEnv = envOrDefault('APP_ENV', 'dev');
+    _productionDebugFlag = envOrDefault(
       'CLIENT_LOG_DEBUG',
-      _envOrDefault('USERFRONT_DEBUG_LOG', ''),
+      envOrDefault('USERFRONT_DEBUG_LOG', ''),
     );
     final debugEnabled = LogPolicy.debugEnabled(
       appEnv: _appEnv,
@@ -54,17 +54,6 @@ class LoggerService {
     });
   }
 
-  static String _envOrDefault(String key, String fallback) {
-    if (!dotenv.isInitialized) {
-      return fallback;
-    }
-    final value = dotenv.env[key];
-    if (value == null || value.trim().isEmpty) {
-      return fallback;
-    }
-    return value;
-  }
-
   /// Initialize the logger. Call this in main.dart
   static void init() {
     // Accessing the instance triggers the constructor