feat(api/auth): Add batch query user API

- Add POST /api/auth/users endpoint for batch user query
    - Add IDs filter to SearchUsersRequest for batch lookup
    - Add Name and Icon fields to PublicUserInfo response
    - Implement searchUsersByIDs with deduplication and ordering
    - Extract buildPublicUserInfo helper for consistent public info mapping

api/auth/init.go

@@ -31,6 +31,7 @@ func init() {
 	// === 认证用户接口（需要登录）===
 	// 用户搜索（返回公开信息）
 	Router.Get("/users", "搜索用户", searchUsers)
+	Router.Post("/users", "批量查询用户", searchUsers)
 
 	// 当前用户（需要认证）
 	meRouter := Router.SubRouter("/me")

api/auth/search_users.go

@@ -7,6 +7,8 @@
 package auth
 
 import (
+	"strings"
+
 	"github.com/veypi/vbase/cfg"
 	"github.com/veypi/vbase/models"
 	"github.com/veypi/vigo"
@@ -15,8 +17,10 @@ import (
 // PublicUserInfo 公开的用户信息（仅包含无关紧要的信息）
 type PublicUserInfo struct {
 	ID       string `json:"id"`
+	Name     string `json:"name"`
 	Username string `json:"username"`
 	Nickname string `json:"nickname"`
+	Icon     string `json:"icon"`
 	Avatar   string `json:"avatar"`
 }
 
@@ -24,6 +28,7 @@ type PublicUserInfo struct {
 type SearchUsersRequest struct {
 	Keyword *string  `json:"keyword" src:"query" desc:"搜索关键词（用户名或昵称）"`
 	Limit   int      `json:"limit" src:"query" default:"20" desc:"返回数量限制"`
+	IDs     []string `json:"ids" src:"json" desc:"用户ID列表"`
 }
 
 // SearchUsersResponse 搜索用户响应
@@ -34,6 +39,10 @@ type SearchUsersResponse struct {
 
 // searchUsers 搜索用户（公开接口，仅返回公开信息）
 func searchUsers(x *vigo.X, req *SearchUsersRequest) (*SearchUsersResponse, error) {
+	if len(req.IDs) > 0 {
+		return searchUsersByIDs(req)
+	}
+
 	if req.Limit <= 0 || req.Limit > 50 {
 		req.Limit = 20
 	}
@@ -59,12 +68,7 @@ func searchUsers(x *vigo.X, req *SearchUsersRequest) (*SearchUsersResponse, erro
 	// 转换为公开信息
 	items := make([]PublicUserInfo, len(users))
 	for i, user := range users {
-		items[i] = PublicUserInfo{
+		items[i] = buildPublicUserInfo(&user)
-			ID:       user.ID,
-			Username: user.Username,
-			Nickname: user.Nickname,
-			Avatar:   user.Avatar,
-		}
 	}
 
 	return &SearchUsersResponse{
@@ -72,3 +76,69 @@ func searchUsers(x *vigo.X, req *SearchUsersRequest) (*SearchUsersResponse, erro
 		Total: total,
 	}, nil
 }
+
+func searchUsersByIDs(req *SearchUsersRequest) (*SearchUsersResponse, error) {
+	ids := make([]string, 0, len(req.IDs))
+	seen := make(map[string]struct{}, len(req.IDs))
+	for _, id := range req.IDs {
+		id = strings.TrimSpace(id)
+		if id == "" {
+			continue
+		}
+		if _, ok := seen[id]; ok {
+			continue
+		}
+		seen[id] = struct{}{}
+		ids = append(ids, id)
+	}
+
+	if len(ids) == 0 {
+		return &SearchUsersResponse{
+			Items: []PublicUserInfo{},
+			Total: 0,
+		}, nil
+	}
+
+	var users []models.User
+	if err := cfg.DB().
+		Model(&models.User{}).
+		Where("status = ? AND id IN ?", models.UserStatusActive, ids).
+		Find(&users).Error; err != nil {
+		return nil, vigo.ErrInternalServer.WithError(err)
+	}
+
+	userMap := make(map[string]models.User, len(users))
+	for _, user := range users {
+		userMap[user.ID] = user
+	}
+
+	items := make([]PublicUserInfo, 0, len(users))
+	for _, id := range ids {
+		user, ok := userMap[id]
+		if !ok {
+			continue
+		}
+		items = append(items, buildPublicUserInfo(&user))
+	}
+
+	return &SearchUsersResponse{
+		Items: items,
+		Total: int64(len(items)),
+	}, nil
+}
+
+func buildPublicUserInfo(user *models.User) PublicUserInfo {
+	name := user.Nickname
+	if name == "" {
+		name = user.Username
+	}
+
+	return PublicUserInfo{
+		ID:       user.ID,
+		Name:     name,
+		Username: user.Username,
+		Nickname: user.Nickname,
+		Icon:     user.Avatar,
+		Avatar:   user.Avatar,
+	}
+}