feat(push): add JPush integration for offline message push

Add JPush (极光推送) integration to enable push notifications for offline users. This includes:
- New jpush client package with API for batch push notifications
- Configuration for jpush (enabled, app_key, master_secret, production mode)
- Updated push service to send messages via JPush when users are offline
- Added PushChatMessage method with do-not-disturb checking
- Integrated push service with chat service to notify offline users of new messages
- Updated deployment workflow with JPush and related environment variables

internal/service/chat_service.go

@@ -61,6 +61,7 @@ type chatServiceImpl struct {
 	userRepo  repository.UserRepository
 	sensitive SensitiveService
 	wsHub     *ws.Hub
+	pushSvc   PushService
 
 	// 缓存相关字段
 	conversationCache *cache.ConversationCache
@@ -75,6 +76,7 @@ func NewChatService(
 	wsHub *ws.Hub,
 	cacheBackend cache.Cache,
 	uploadService *UploadService,
+	pushSvc PushService,
 ) ChatService {
 	// 创建适配器
 	convRepoAdapter := cache.NewConversationRepositoryAdapter(repo)
@@ -93,6 +95,7 @@ func NewChatService(
 		userRepo:          userRepo,
 		sensitive:         sensitive,
 		wsHub:             wsHub,
+		pushSvc:           pushSvc,
 		conversationCache: conversationCache,
 		uploadService:     uploadService,
 	}
@@ -384,6 +387,34 @@ func (s *chatServiceImpl) SendMessage(ctx context.Context, senderID string, conv
 		}
 	}
 
+	// 对离线用户通过 JPush 推送聊天消息通知
+	if s.pushSvc != nil && len(participants) > 0 {
+		sender := ChatMessageSender{ID: senderID}
+		if senderUser, sErr := s.userRepo.GetByID(senderID); sErr == nil {
+			sender.Name = senderUser.Nickname
+			sender.Avatar = senderUser.Avatar
+		}
+		convType := conv.Type
+		convName := ""
+		if conv.Type == model.ConversationTypeGroup && conv.Group != nil {
+			convName = conv.Group.Name
+		}
+		for _, p := range participants {
+			if p.UserID == senderID {
+				continue
+			}
+			go func(userID string, sender ChatMessageSender) {
+				if pushErr := s.pushSvc.PushChatMessage(context.Background(), userID, conversationID, &sender, convType, convName, message); pushErr != nil {
+					zap.L().Debug("push chat message skipped or failed",
+						zap.String("userID", userID),
+						zap.String("conversationID", conversationID),
+						zap.Error(pushErr),
+					)
+				}
+			}(p.UserID, sender)
+		}
+	}
+
 	return message, nil
 }