feat(team): 新增 TeamHook 支持团队成员添加后回调

团队管理员邀请用户加入团队时，需要外部项目（如内部订阅系统）在成员添加后执行额外逻辑（如授予专业版订阅）。
新增 TeamHook 接口和 WithTeamHook BridgeOption，在 AddUser/AddAdmin 中调用 OnMemberAdded 回调。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: yokowu

backend/biz/team/usecase/user.go

@@ -27,6 +27,7 @@ type TeamGroupUserUsecase struct {
 	config      *config.Config
 	smtpClient  domain.EmailSender
 	redisClient *redis.Client
+	teamHook    domain.TeamHook
 }
 
 // NewTeamGroupUserUsecase 创建团队分组成员业务逻辑层实例
@@ -42,6 +43,10 @@ func NewTeamGroupUserUsecase(i *do.Injector) (domain.TeamGroupUserUsecase, error
 		redisClient: do.MustInvoke[*redis.Client](i),
 	}
 
+	if hook, err := do.Invoke[domain.TeamHook](i); err == nil {
+		t.teamHook = hook
+	}
+
 	go t.initTeam()
 
 	return t, nil
@@ -93,6 +98,13 @@ func (u *TeamGroupUserUsecase) AddUser(ctx context.Context, teamUser *domain.Tea
 	if err != nil {
 		return nil, err
 	}
+	if u.teamHook != nil {
+		for _, user := range users {
+			if err := u.teamHook.OnMemberAdded(ctx, teamUser.GetTeamID(), user.ID); err != nil {
+				u.logger.WarnContext(ctx, "teamHook.OnMemberAdded failed", "user_id", user.ID, "error", err)
+			}
+		}
+	}
 	// 发送重置密码邮件（如果没有发送成功就用户自己请求重置）
 	for _, user := range users {
 		if user.Email != "" {
@@ -123,6 +135,11 @@ func (u *TeamGroupUserUsecase) AddAdmin(ctx context.Context, teamUser *domain.Te
 	if err != nil {
 		return nil, err
 	}
+	if u.teamHook != nil {
+		if err := u.teamHook.OnMemberAdded(ctx, teamUser.GetTeamID(), user.ID); err != nil {
+			u.logger.WarnContext(ctx, "teamHook.OnMemberAdded failed", "user_id", user.ID, "error", err)
+		}
+	}
 	if user.Email != "" {
 		token, err := u.generateResetPWDToken(ctx, user.ID)
 		if err != nil {

backend/bridge.go

@@ -78,6 +78,13 @@ func WithProjectHook(hook domain.ProjectHook) BridgeOption {
 	}
 }
 
+// WithTeamHook 注入团队成员变更回调
+func WithTeamHook(hook domain.TeamHook) BridgeOption {
+	return func(i *do.Injector) {
+		do.ProvideValue(i, hook)
+	}
+}
+
 // WithSiteResolver 注入站点解析器
 func WithSiteResolver(resolver domain.SiteResolver) BridgeOption {
 	return func(i *do.Injector) {

backend/domain/domain.go

@@ -56,6 +56,12 @@ type ProjectHook interface {
 	GetInternalRepoToken(ctx context.Context, userID uuid.UUID, projectID uuid.UUID) (string, error)
 }
 
+// TeamHook 团队成员变更回调接口（可选，内部项目通过 WithTeamHook 注入）
+type TeamHook interface {
+	// OnMemberAdded 团队成员添加后回调（如授予专业版订阅）
+	OnMemberAdded(ctx context.Context, teamID, userID uuid.UUID) error
+}
+
 // SiteResolver 站点解析接口（可选，内部项目通过 WithSiteResolver 注入）
 type SiteResolver interface {
 	// ResolveByHost 通过域名解析站点配置