make dev/dev-debug 구분.

userfront/lib/core/services/log_policy.dart

@@ -29,23 +29,37 @@ class LogPolicy {
         env == 'staging';
   }
 
-  static bool parseBoolFlag(String? raw) {
+  static ({bool enabled, bool specified}) parseOptionalBoolFlag(String? raw) {
     final value = (raw ?? '').trim().toLowerCase();
-    return value == '1' ||
+    if (value == '1' ||
         value == 'true' ||
         value == 'yes' ||
         value == 'y' ||
-        value == 'on';
+        value == 'on') {
+      return (enabled: true, specified: true);
+    }
+    if (value == '0' ||
+        value == 'false' ||
+        value == 'no' ||
+        value == 'n' ||
+        value == 'off') {
+      return (enabled: false, specified: true);
+    }
+    return (enabled: false, specified: false);
   }
 
   static bool debugEnabled({
     required String? appEnv,
     required String? productionDebugFlag,
   }) {
+    final flag = parseOptionalBoolFlag(productionDebugFlag);
+    if (flag.specified) {
+      return flag.enabled;
+    }
     if (!isProductionEnv(appEnv)) {
       return true;
     }
-    return parseBoolFlag(productionDebugFlag);
+    return false;
   }
 
   static bool shouldRelayClientLog({

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

userfront/lib/core/services/runtime_env.dart

@@ -1,5 +1,11 @@
 import 'package:flutter_dotenv/flutter_dotenv.dart';
 
+const _compileTimeEnv = {
+  'APP_ENV': String.fromEnvironment('APP_ENV'),
+  'CLIENT_LOG_DEBUG': String.fromEnvironment('CLIENT_LOG_DEBUG'),
+  'USERFRONT_DEBUG_LOG': String.fromEnvironment('USERFRONT_DEBUG_LOG'),
+};
+
 String runtimeOriginFallback() {
   try {
     final origin = Uri.base.origin;
@@ -11,14 +17,18 @@ String runtimeOriginFallback() {
 }
 
 String envOrDefault(String key, String fallback) {
-  if (!dotenv.isInitialized) {
-    return fallback;
+  if (dotenv.isInitialized) {
+    final value = dotenv.env[key];
+    if (value != null && value.trim().isNotEmpty) {
+      return value;
+    }
   }
-  final value = dotenv.env[key];
-  if (value == null || value.trim().isEmpty) {
-    return fallback;
+
+  final compileTimeValue = _compileTimeEnv[key];
+  if (compileTimeValue != null && compileTimeValue.trim().isNotEmpty) {
+    return compileTimeValue;
   }
-  return value;
+  return fallback;
 }
 
 String sanitizedUrl(String value) {