feat(posts): filter posts by blocked users

Add functionality to filter out posts from blocked users in post listing endpoints. Includes a new `IsBlockedBatch` method for efficient batch checking of blocked relationships and `is_blocked` field in API responses when viewing a blocked user's posts.

internal/service/push_service.go

@@ -482,6 +482,7 @@ func (s *pushServiceImpl) pushSystemNotificationViaWebSocket(ctx context.Context
 		"type":       string(notification.Type),
 		"title":      notification.Title,
 		"content":    notification.Content,
+		"is_read":    notification.IsRead,
 		"extra":      map[string]any{},
 		"created_at": notification.CreatedAt.Format("2006-01-02T15:04:05Z07:00"),
 	}

internal/service/user_service.go

@@ -53,6 +53,7 @@ type UserService interface {
 	UnblockUser(ctx context.Context, blockerID, blockedID string) error
 	GetBlockedUsers(ctx context.Context, blockerID string, page, pageSize int) ([]*model.User, int64, error)
 	IsBlocked(ctx context.Context, blockerID, blockedID string) (bool, error)
+	IsBlockedBatch(ctx context.Context, blockerID string, blockedIDs []string) (map[string]bool, error)
 
 	// 隐私设置
 	GetPrivacySettings(ctx context.Context, userID string) (*model.PrivacySettings, error)
@@ -583,6 +584,11 @@ func (s *userServiceImpl) IsBlocked(ctx context.Context, blockerID, blockedID st
 	return s.userRepo.IsBlocked(blockerID, blockedID)
 }
 
+// IsBlockedBatch 批量检查拉黑关系
+func (s *userServiceImpl) IsBlockedBatch(ctx context.Context, blockerID string, blockedIDs []string) (map[string]bool, error) {
+	return s.userRepo.IsBlockedBatch(blockerID, blockedIDs)
+}
+
 // GetFollowingList 获取关注列表（字符串参数版本）
 func (s *userServiceImpl) GetFollowingList(ctx context.Context, userID, page, pageSize string) ([]*model.User, error) {
 	// 转换字符串参数为整数