디버깅 로그 추가

userfront/lib/features/auth/domain/password_login_flow_policy.dart

@@ -0,0 +1,23 @@
+enum PasswordLoginNextAction { redirectToOidc, acceptOidc, localLogin, invalid }
+
+PasswordLoginNextAction decidePasswordLoginNextAction({
+  required bool hasLoginChallenge,
+  required String? redirectTo,
+  required String? jwt,
+}) {
+  final hasRedirectTo = redirectTo != null && redirectTo.isNotEmpty;
+  if (hasRedirectTo) {
+    return PasswordLoginNextAction.redirectToOidc;
+  }
+
+  if (hasLoginChallenge) {
+    return PasswordLoginNextAction.acceptOidc;
+  }
+
+  final hasJwt = jwt != null && jwt.isNotEmpty;
+  if (hasJwt) {
+    return PasswordLoginNextAction.localLogin;
+  }
+
+  return PasswordLoginNextAction.invalid;
+}