fix: 后台加人人数改为事务内实际插入数

internal/admin/groups.go

@@ -316,13 +316,6 @@ func (h *Handler) handleGroupAddMembers(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	before, err := h.groupMemberCount(r.Context(), id)
-	if err != nil {
-		h.auditP(p, "group_add_members", id, "error", ip)
-		httpx.WriteError(w, http.StatusInternalServerError, "internal", "内部错误")
-		return
-	}
-
 	res, err := h.groups.AdminAddMembers(r.Context(), id, req.MemberIDs)
 	if err != nil {
 		h.writeGroupErr(w, p, "group_add_members", id, ip, err)
@@ -332,14 +325,7 @@ func (h *Handler) handleGroupAddMembers(w http.ResponseWriter, r *http.Request)
 	if failed == nil {
 		failed = []group.MemberFail{}
 	}
-
-	after, err := h.groupMemberCount(r.Context(), id)
-	if err != nil {
-		h.auditP(p, "group_add_members", id, "error", ip)
-		httpx.WriteError(w, http.StatusInternalServerError, "internal", "内部错误")
-		return
-	}
-	added := after - before
+	added := res.Added
 	if added < 0 {
 		added = 0
 	}
@@ -434,13 +420,6 @@ func (h *Handler) groupOwner(ctx context.Context, groupID string) (string, error
 	return owner, err
 }
 
-func (h *Handler) groupMemberCount(ctx context.Context, groupID string) (int, error) {
-	var n int
-	err := h.db.Read.QueryRowContext(ctx,
-		`SELECT COUNT(*) FROM group_members WHERE group_id = ?`, groupID).Scan(&n)
-	return n, err
-}
-
 func (h *Handler) groupSummary(ctx context.Context, groupID string) (map[string]any, error) {
 	var name, owner string
 	var created int64

internal/app/group/app.go

@@ -620,7 +620,7 @@ func (a *App) AdminAddMembers(ctx context.Context, groupID string, memberIDs []s
 		failed = append(failed, MemberFail{ID: id, Code: protocol.CodeGroupFull})
 	}
 	if len(toAdd) == 0 {
-		return AddResult{Failed: failed}, nil
+		return AddResult{Failed: failed, Added: 0}, nil
 	}
 	now := a.nowMs()
 	var inserted []string
@@ -664,7 +664,7 @@ func (a *App) AdminAddMembers(ctx context.Context, groupID string, memberIDs []s
 	for _, id := range inserted {
 		a.emit(ctx, notify, groupID, eventMemberAdded, id, now)
 	}
-	return AddResult{Failed: failed}, nil
+	return AddResult{Failed: failed, Added: len(inserted)}, nil
 }
 
 func (a *App) createAdmin(ctx context.Context, ownerID, name, gid string, members []protocol.GroupMemberIn) (CreateResult, error) {

internal/app/group/service.go

@@ -28,6 +28,8 @@ type CreateResult struct {
 // AddResult 是加人结果。
 type AddResult struct {
 	Failed []MemberFail `json:"failed,omitempty"`
+	// Added 是本请求在写事务内实际插入的人数。不进协议 JSON，供后台审计使用。
+	Added int `json:"-"`
 }
 
 // ListItem 是 group.list 一项。