feat(messaging): Flutter Web 알림 마일스톤을 완료 상태로 승격하고 알림 라우팅을 개선한다

- PHASE.md에서 flutter-web-notification-smoke 마일스톤 상태를 완료로 변경하고 archive로 이동
- browser_notification_interop_web.dart에서 라우팅 데이터 캡처 방식을 인스턴스 변수에서 인자 전달로 변경하여 각 알림별 데이터 격리
- nexo_messaging_plugin.dart에서 permissionGranted를 고정 값에서 실제 권한 상태 기반으로 변경
- 코드 스타일 개선: if문 블록 포맷팅, 단일 줄 최적화
- 테스트 추가: show 실패 시 최신 권한 상태를 반환하는 검증

agent-roadmap/archive/phase/messaging-runtime/milestones/flutter-web-notification-smoke.md

@@ -12,7 +12,7 @@ Flutter Web foreground browser notification이 실제 브라우저 환경에서
 
 ## 상태
 
-[검토중]
+[완료]
 
 ## 승격 조건
 
@@ -54,17 +54,18 @@ VM 단위 테스트와 Chrome/web 테스트가 서로 다른 platform expectatio
 
 ## 완료 리뷰
 
-- 상태: 요청됨
+- 상태: 승인됨
 - 요청일: 2026-06-08
+- 승인일: 2026-06-09
 - 완료 근거:
   - `agent-task/archive/2026/06/m-flutter-web-notification-smoke/01_web_scaffold/complete.log`
   - `agent-task/archive/2026/06/m-flutter-web-notification-smoke/02+01_web_runtime/complete.log`
   - `agent-task/archive/2026/06/m-flutter-web-notification-smoke/03_chrome_tests/complete.log`
   - `agent-task/archive/2026/06/m-flutter-web-notification-smoke/04+03_manual_evidence_closeout/complete.log`
 - 리뷰 필요:
-  - [ ] 사용자가 완료 결과를 확인했다
-  - [ ] archive 이동을 승인했다
-- 리뷰 코멘트: 없음
+  - [x] 사용자가 완료 결과를 확인했다
+  - [x] archive 이동을 승인했다
+- 리뷰 코멘트: 2026-06-09 코드 관점 재검토에서 foreground web notification permission result와 notification별 click routing data 보강 후 `flutter analyze --no-fatal-infos`, `flutter test`, Chrome web test, 기본/opt-in `bin/test`가 통과했다.
 
 ## 범위 제외
 

agent-roadmap/phase/messaging-runtime/PHASE.md

@@ -40,8 +40,8 @@ Mattermost server/webapp/push-proxy는 upstream-followable runtime으로 두고,
 - [완료] Flutter Web 알림
   - 경로: `agent-roadmap/archive/phase/messaging-runtime/milestones/flutter-web-notification.md`
   - 요약: `packages/messaging_flutter`를 Flutter Web/Chrome foreground browser notification까지 확장하고, Full Web Push는 별도 후속 계약으로 분리한다.
-- [검토중] Flutter Web 알림 Smoke 보완
-  - 경로: `agent-roadmap/phase/messaging-runtime/milestones/flutter-web-notification-smoke.md`
+- [완료] Flutter Web 알림 Smoke 보완
+  - 경로: `agent-roadmap/archive/phase/messaging-runtime/milestones/flutter-web-notification-smoke.md`
   - 요약: Flutter Web foreground browser notification smoke가 원격 web runner와 forwarded localhost URL에서 실제로 재현되도록 host scaffold, Chrome 테스트, 수동 evidence 기준을 보완한다.
 - [계획] iOS 알림 테스트
   - 경로: `agent-roadmap/phase/messaging-runtime/milestones/ios-notification-test.md`

packages/messaging_flutter/lib/src/nexo_messaging_plugin.dart

@@ -206,10 +206,18 @@ class NexoMessagingPlugin {
     }
 
     // Forward routing fields so click callback can reconstruct the event.
-    if (payload['server_url'] != null) options['server_url'] = payload['server_url'];
-    if (payload['channel_id'] != null) options['channel_id'] = payload['channel_id'];
-    if (payload['root_id'] != null) options['root_id'] = payload['root_id'];
-    if (payload['is_crt_enabled'] != null) options['is_crt_enabled'] = payload['is_crt_enabled'];
+    if (payload['server_url'] != null) {
+      options['server_url'] = payload['server_url'];
+    }
+    if (payload['channel_id'] != null) {
+      options['channel_id'] = payload['channel_id'];
+    }
+    if (payload['root_id'] != null) {
+      options['root_id'] = payload['root_id'];
+    }
+    if (payload['is_crt_enabled'] != null) {
+      options['is_crt_enabled'] = payload['is_crt_enabled'];
+    }
 
     // Show the notification; set up click routing once on first call.
     if (!_clickHandlerRegistered) {
@@ -218,6 +226,8 @@ class NexoMessagingPlugin {
     }
 
     final success = _interop.show(options);
+    final permissionGranted = _interop.permission.toLowerCase() == 'granted';
+
     if (success) {
       // Forward the raw notification to onNotification stream.
       final normalized = normalizeWebForegroundMessage(payload);
@@ -229,7 +239,7 @@ class NexoMessagingPlugin {
     return NexoMessagingWebNotificationDisplayResult(
       success: success,
       isSupported: true,
-      permissionGranted: true,
+      permissionGranted: permissionGranted,
     );
   }
 

packages/messaging_flutter/lib/src/web/browser_notification_interop_web.dart

@@ -33,10 +33,6 @@ class BrowserNotificationInteropImpl extends BrowserNotificationInterop {
   /// Captured click callback set via [setClickHandler].
   void Function(Map<String, Object?>)? _clickHandler;
 
-  /// Routing data captured at the moment the notification was displayed
-  /// so that the click event listener can reconstruct it.
-  Map<String, Object?> _lastRoutingData = const <String, Object?>{};
-
   @override
   void setClickHandler(void Function(Map<String, Object?> data) onClick) {
     _clickHandler = onClick;
@@ -49,8 +45,8 @@ class BrowserNotificationInteropImpl extends BrowserNotificationInterop {
       final title = options['title'] as String?;
       if (title == null) return false;
 
-      // Capture routing fields for the click handler.
-      _lastRoutingData = <String, Object?>{};
+      // Capture routing fields for this notification.
+      final routingData = <String, Object?>{};
       final routingKeys = <String>[
         'server_url',
         'channel_id',
@@ -60,7 +56,7 @@ class BrowserNotificationInteropImpl extends BrowserNotificationInterop {
       for (final key in routingKeys) {
         final val = options[key];
         if (val != null) {
-          _lastRoutingData[key] = val;
+          routingData[key] = val;
         }
       }
 
@@ -69,15 +65,11 @@ class BrowserNotificationInteropImpl extends BrowserNotificationInterop {
       final icon = options['icon'] as String? ?? '';
       final tag = options['tag'] as String? ?? '';
 
-      final opts = web.NotificationOptions(
-        body: body,
-        icon: icon,
-        tag: tag,
-      );
+      final opts = web.NotificationOptions(body: body, icon: icon, tag: tag);
       final notification = web.Notification(title, opts);
 
       // Attach the click handler immediately after creation.
-      _attachClickHandler(notification);
+      _attachClickHandler(notification, routingData);
       return true;
     } catch (_) {
       return false;
@@ -86,17 +78,15 @@ class BrowserNotificationInteropImpl extends BrowserNotificationInterop {
 
   /// Attaches a click listener on [notification] that forwards the
   /// stored routing data to the [_clickHandler] callback.
-  void _attachClickHandler(web.Notification notification) {
-    final data = _lastRoutingData;
+  void _attachClickHandler(
+    web.Notification notification,
+    Map<String, Object?> routingData,
+  ) {
     final clickListener = ((web.Event event) {
-      _clickHandler?.call(data);
+      _clickHandler?.call(routingData);
     }).toJS;
     try {
-      notification.addEventListener(
-        'click',
-        clickListener,
-        false.toJS,
-      );
+      notification.addEventListener('click', clickListener, false.toJS);
     } catch (_) {
       // Best-effort: failure here will not crash the notification display.
     }

packages/messaging_flutter/test/nexo_messaging_test.dart

@@ -10,14 +10,18 @@ import 'package:nexo_messaging/src/web/foreground_message_mapper.dart';
 class FakeBrowserNotificationInterop implements BrowserNotificationInterop {
   FakeBrowserNotificationInterop({
     this.isSupportedParam = true,
-    this.permissionParam = 'granted',
+    String permissionParam = 'granted',
+    this.showReturnValue = true,
+    String? permissionAfterShow,
   }) : _isSupported = isSupportedParam,
-       _permission = permissionParam;
+       _permission = permissionParam,
+       _permissionAfterShow = permissionAfterShow;
 
   final bool _isSupported;
-  final String _permission;
+  String _permission;
+  final String? _permissionAfterShow;
   final bool isSupportedParam;
-  final String permissionParam;
+  final bool showReturnValue;
 
   bool showCalled = false;
   Map<String, Object?>? lastShowOptions;
@@ -33,7 +37,10 @@ class FakeBrowserNotificationInterop implements BrowserNotificationInterop {
     if (!isSupported) return false;
     showCalled = true;
     lastShowOptions = Map<String, Object?>.from(options);
-    return true;
+    if (_permissionAfterShow != null) {
+      _permission = _permissionAfterShow;
+    }
+    return showReturnValue;
   }
 
   @override
@@ -563,13 +570,20 @@ void main() {
     late NexoMessagingPlugin plugin;
     late FakeBrowserNotificationInterop fake;
 
-    void setUpWith({bool isSupported = true, String perm = 'granted'}) {
+    void setUpWith({
+      bool isSupported = true,
+      String perm = 'granted',
+      bool showReturnValue = true,
+      String? permissionAfterShow,
+    }) {
       final ac = MethodChannel(NexoMessagingPlugin.actionChannelName);
       TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
           .setMockMethodCallHandler(ac, (call) async => null);
       fake = FakeBrowserNotificationInterop(
         isSupportedParam: isSupported,
         permissionParam: perm,
+        showReturnValue: showReturnValue,
+        permissionAfterShow: permissionAfterShow,
       );
       plugin = NexoMessagingPlugin.instance;
       plugin.resetForTesting();
@@ -615,6 +629,21 @@ void main() {
       expect(fake.lastShowOptions!['body'], 'B');
     });
 
+    test('show failure reads latest permission before returning', () {
+      setUpWith(
+        isSupported: true,
+        perm: 'granted',
+        showReturnValue: false,
+        permissionAfterShow: 'denied',
+      );
+
+      final r = plugin.showWebForegroundNotification({'title': 'H'});
+
+      expect(r.success, isFalse);
+      expect(r.isSupported, isTrue);
+      expect(r.permissionGranted, isFalse);
+    });
+
     test('interop.show() receives routing fields', () {
       setUpWith();
       plugin.showWebForegroundNotification({