添加了后台管理接口，包括用户、角色、材质管理，管理员可进行删除、查找、设定状态操作，详情在README

README.md

@@ -144,6 +144,140 @@ golangci-lint run (若已安装)
 - 若手动运行，需要保证 `docs/` 下的 `docs.go`、`swagger.json`、`swagger.yaml` 与代码同步
 - 通过 `SERVER_SWAGGER_ENABLED=false` 可在生产环境关闭 Swagger UI 暴露
 
+## 🔐 管理后台 API
+
+管理后台接口均需要管理员权限（`role=admin`），所有接口路径前缀为 `/api/v1/admin`。
+
+### 📊 统计信息
+
+| 接口 | 方法 | 说明 |
+| --- | --- | --- |
+| `/stats` | GET | 获取系统统计数据（用户数、材质数、下载量等） |
+
+**响应示例：**
+```json
+{
+  "code": 0,
+  "message": "success",
+  "data": {
+    "total_users": 100,
+    "active_users": 80,
+    "banned_users": 5,
+    "admin_users": 3,
+    "total_textures": 500,
+    "public_textures": 300,
+    "pending_textures": 10,
+    "total_downloads": 1000,
+    "total_favorites": 500
+  }
+}
+```
+
+### 👥 角色管理
+
+| 接口 | 方法 | 说明 |
+| --- | --- | --- |
+| `/roles` | GET | 获取所有可用角色列表 |
+
+**响应示例：**
+```json
+{
+  "code": 0,
+  "message": "success",
+  "data": {
+    "roles": [
+      {
+        "name": "user",
+        "display_name": "普通用户",
+        "description": "拥有基本用户权限"
+      },
+      {
+        "name": "admin",
+        "display_name": "管理员",
+        "description": "拥有所有管理权限"
+      }
+    ]
+  }
+}
+```
+
+### 👤 用户管理
+
+| 接口 | 方法 | 说明 |
+| --- | --- | --- |
+| `/users` | GET | 获取用户列表（分页） |
+| `/users/search` | GET | 搜索用户（支持关键词、角色、状态筛选、排序） |
+| `/users/{id}` | GET | 获取用户详情 |
+| `/users/{id}` | DELETE | 删除用户（软删除） |
+| `/users/role` | PUT | 设置单个用户角色 |
+| `/users/status` | PUT | 设置单个用户状态（封禁/解封） |
+| `/users/batch-role` | PUT | 批量设置用户角色 |
+| `/users/batch-delete` | DELETE | 批量删除用户 |
+
+**搜索用户请求参数：**
+- `keyword` (string): 搜索关键词（用户名或邮箱）
+- `role` (string): 角色筛选
+- `status` (int): 状态筛选（1=正常，0=禁用，-1=删除）
+- `sort_by` (string): 排序字段
+- `sort_desc` (bool): 是否降序
+- `page` (int): 页码
+- `page_size` (int): 每页数量
+
+**设置用户状态请求示例：**
+```json
+{
+  "user_id": 123,
+  "status": 0
+}
+```
+- `status`: 1=正常，0=禁用，-1=删除
+
+**批量设置角色请求示例：**
+```json
+{
+  "user_ids": [1, 2, 3],
+  "role": "admin"
+}
+```
+
+### 🎨 材质管理
+
+| 接口 | 方法 | 说明 |
+| --- | --- | --- |
+| `/textures` | GET | 获取材质列表（分页） |
+| `/textures/search` | GET | 搜索材质（支持关键词、类型、状态、上传者筛选、排序） |
+| `/textures/{id}` | PUT | 更新材质信息（名称、描述、公开状态、审核状态） |
+| `/textures/{id}` | DELETE | 删除材质 |
+| `/textures/batch-delete` | DELETE | 批量删除材质 |
+
+**搜索材质请求参数：**
+- `keyword` (string): 搜索关键词
+- `type` (string): 材质类型（SKIN/CAPE）
+- `status` (int): 状态筛选
+- `uploader_id` (int): 上传者ID筛选
+- `sort_by` (string): 排序字段
+- `sort_desc` (bool): 是否降序
+- `page` (int): 页码
+- `page_size` (int): 每页数量
+
+**更新材质请求示例：**
+```json
+{
+  "name": "新皮肤名称",
+  "description": "新描述",
+  "is_public": true,
+  "status": 1
+}
+```
+
+### 🔒 安全特性
+
+1. **权限保护**：所有管理接口都需要管理员权限（`role=admin`）
+2. **安全限制**：管理员不能修改/删除自己的角色和状态
+3. **批量操作**：支持批量设置角色和批量删除
+4. **操作日志**：所有管理操作都会记录日志
+5. **封禁功能**：通过 `/users/status` 接口可以封禁/解封用户
+
 ## 🤝 贡献指南
 
 1. Fork & Clone

go.mod

@@ -112,7 +112,7 @@ require (
 	github.com/spf13/cast v1.10.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
-	github.com/swaggo/swag v1.16.6
+	github.com/swaggo/swag v1.16.6 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.3.1 // indirect
 	go.uber.org/multierr v1.11.0 // indirect

internal/handler/admin_handler.go

@@ -6,6 +6,7 @@ import (
 
 	"carrotskin/internal/container"
 	"carrotskin/internal/model"
+	"carrotskin/internal/types"
 
 	"github.com/gin-gonic/gin"
 	"go.uber.org/zap"
@@ -365,18 +366,527 @@ func (h *AdminHandler) GetTextureList(c *gin.Context) {
 	}))
 }
 
-// GetPermissions 获取权限列表
-// @Summary 获取权限列表
-// @Description 管理员获取所有Casbin权限规则
+// SearchUsers 搜索用户
+// @Summary 搜索用户
+// @Description 管理员根据条件搜索用户
 // @Tags Admin
 // @Produce json
-// @Success 200 {object} model.Response{data=map[string]interface{}} "获取成功"
+// @Param keyword query string false "搜索关键词（用户名或邮箱）"
+// @Param role query string false "角色筛选"
+// @Param status query int false "状态筛选"
+// @Param sort_by query string false "排序字段"
+// @Param sort_desc query bool false "是否降序"
+// @Param page query int false "页码"
+// @Param page_size query int false "每页数量"
+// @Success 200 {object} model.Response{data=map[string]interface{}} "搜索成功"
 // @Security BearerAuth
-// @Router /api/v1/admin/permissions [get]
-func (h *AdminHandler) GetPermissions(c *gin.Context) {
-	// 获取所有权限规则
-	policies, _ := h.container.Casbin.GetEnforcer().GetPolicy()
+// @Router /api/v1/admin/users/search [get]
+func (h *AdminHandler) SearchUsers(c *gin.Context) {
+	var req types.AdminUserSearchRequest
+	if err := c.ShouldBindQuery(&req); err != nil {
+		RespondBadRequest(c, "参数错误", err)
+		return
+	}
+
+	if req.Page < 1 {
+		req.Page = 1
+	}
+	if req.PageSize < 1 || req.PageSize > 100 {
+		req.PageSize = 20
+	}
+
+	db := h.container.DB.Model(&model.User{})
+
+	// 关键词搜索
+	if req.Keyword != "" {
+		db = db.Where("username LIKE ? OR email LIKE ?", "%"+req.Keyword+"%", "%"+req.Keyword+"%")
+	}
+
+	// 角色筛选
+	if req.Role != "" {
+		db = db.Where("role = ?", req.Role)
+	}
+
+	// 状态筛选
+	if req.Status != nil {
+		db = db.Where("status = ?", *req.Status)
+	}
+
+	// 排序
+	sortBy := "id"
+	if req.SortBy != "" {
+		sortBy = req.SortBy
+	}
+	order := sortBy
+	if req.SortDesc {
+		order += " DESC"
+	}
+	db = db.Order(order)
+
+	// 分页
+	var total int64
+	db.Count(&total)
+
+	var users []model.User
+	db.Offset((req.Page - 1) * req.PageSize).Limit(req.PageSize).Find(&users)
+
+	// 构建响应
+	userList := make([]gin.H, len(users))
+	for i, u := range users {
+		userList[i] = gin.H{
+			"id":            u.ID,
+			"username":      u.Username,
+			"email":         u.Email,
+			"avatar":        u.Avatar,
+			"role":          u.Role,
+			"status":        u.Status,
+			"points":        u.Points,
+			"last_login_at": u.LastLoginAt,
+			"created_at":    u.CreatedAt,
+		}
+	}
+
 	c.JSON(http.StatusOK, model.NewSuccessResponse(gin.H{
-		"policies": policies,
+		"users":     userList,
+		"total":     total,
+		"page":      req.Page,
+		"page_size": req.PageSize,
 	}))
 }
+
+// DeleteUser 删除用户
+// @Summary 删除用户
+// @Description 管理员删除用户（软删除）
+// @Tags Admin
+// @Produce json
+// @Param id path int true "用户ID"
+// @Success 200 {object} model.Response{data=map[string]interface{}} "删除成功"
+// @Failure 400 {object} model.ErrorResponse "不能删除自己"
+// @Failure 404 {object} model.ErrorResponse "用户不存在"
+// @Security BearerAuth
+// @Router /api/v1/admin/users/{id} [delete]
+func (h *AdminHandler) DeleteUser(c *gin.Context) {
+	userID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		RespondBadRequest(c, "无效的用户ID", err)
+		return
+	}
+
+	operatorID, _ := c.Get("user_id")
+
+	// 不能删除自己
+	if userID == operatorID.(int64) {
+		c.JSON(http.StatusBadRequest, model.NewErrorResponse(
+			model.CodeBadRequest,
+			"不能删除自己",
+			nil,
+		))
+		return
+	}
+
+	// 检查用户是否存在
+	user, err := h.container.UserRepo.FindByID(c.Request.Context(), userID)
+	if err != nil || user == nil {
+		c.JSON(http.StatusNotFound, model.NewErrorResponse(
+			model.CodeNotFound,
+			"用户不存在",
+			nil,
+		))
+		return
+	}
+
+	// 软删除
+	if err := h.container.DB.Delete(user).Error; err != nil {
+		RespondServerError(c, "删除用户失败", err)
+		return
+	}
+
+	h.container.Logger.Info("管理员删除用户",
+		zap.Int64("operator_id", operatorID.(int64)),
+		zap.Int64("deleted_user_id", userID),
+		zap.String("username", user.Username),
+	)
+
+	c.JSON(http.StatusOK, model.NewSuccessResponse(gin.H{
+		"message": "用户删除成功",
+		"user_id": userID,
+	}))
+}
+
+// BatchSetUserRole 批量设置用户角色
+// @Summary 批量设置用户角色
+// @Description 管理员批量设置多个用户的角色
+// @Tags Admin
+// @Accept json
+// @Produce json
+// @Param request body map[string]interface{} true "批量设置请求"
+// @Success 200 {object} model.Response{data=map[string]interface{}} "设置成功"
+// @Failure 400 {object} model.ErrorResponse "参数错误"
+// @Security BearerAuth
+// @Router /api/v1/admin/users/batch-role [put]
+func (h *AdminHandler) BatchSetUserRole(c *gin.Context) {
+	var req struct {
+		UserIDs []int64 `json:"user_ids" binding:"required,min=1"`
+		Role    string  `json:"role" binding:"required,oneof=user admin"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		RespondBadRequest(c, "参数错误", err)
+		return
+	}
+
+	operatorID, _ := c.Get("user_id")
+
+	// 检查是否包含自己
+	for _, uid := range req.UserIDs {
+		if uid == operatorID.(int64) {
+			c.JSON(http.StatusBadRequest, model.NewErrorResponse(
+				model.CodeBadRequest,
+				"不能修改自己的角色",
+				nil,
+			))
+			return
+		}
+	}
+
+	// 批量更新
+	if err := h.container.DB.Model(&model.User{}).
+		Where("id IN ?", req.UserIDs).
+		Update("role", req.Role).Error; err != nil {
+		RespondServerError(c, "批量更新角色失败", err)
+		return
+	}
+
+	h.container.Logger.Info("管理员批量设置用户角色",
+		zap.Int64("operator_id", operatorID.(int64)),
+		zap.Int("count", len(req.UserIDs)),
+		zap.String("role", req.Role),
+	)
+
+	c.JSON(http.StatusOK, model.NewSuccessResponse(gin.H{
+		"message": "批量设置角色成功",
+		"count":   len(req.UserIDs),
+		"role":    req.Role,
+	}))
+}
+
+// BatchDeleteUsers 批量删除用户
+// @Summary 批量删除用户
+// @Description 管理员批量删除多个用户
+// @Tags Admin
+// @Accept json
+// @Produce json
+// @Param request body map[string]interface{} true "批量删除请求"
+// @Success 200 {object} model.Response{data=map[string]interface{}} "删除成功"
+// @Failure 400 {object} model.ErrorResponse "参数错误"
+// @Security BearerAuth
+// @Router /api/v1/admin/users/batch-delete [delete]
+func (h *AdminHandler) BatchDeleteUsers(c *gin.Context) {
+	var req struct {
+		UserIDs []int64 `json:"user_ids" binding:"required,min=1"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		RespondBadRequest(c, "参数错误", err)
+		return
+	}
+
+	operatorID, _ := c.Get("user_id")
+
+	// 检查是否包含自己
+	for _, uid := range req.UserIDs {
+		if uid == operatorID.(int64) {
+			c.JSON(http.StatusBadRequest, model.NewErrorResponse(
+				model.CodeBadRequest,
+				"不能删除自己",
+				nil,
+			))
+			return
+		}
+	}
+
+	// 批量软删除
+	if err := h.container.DB.Where("id IN ?", req.UserIDs).Delete(&model.User{}).Error; err != nil {
+		RespondServerError(c, "批量删除用户失败", err)
+		return
+	}
+
+	h.container.Logger.Info("管理员批量删除用户",
+		zap.Int64("operator_id", operatorID.(int64)),
+		zap.Int("count", len(req.UserIDs)),
+	)
+
+	c.JSON(http.StatusOK, model.NewSuccessResponse(gin.H{
+		"message": "批量删除用户成功",
+		"count":   len(req.UserIDs),
+	}))
+}
+
+// GetRoles 获取角色列表
+// @Summary 获取角色列表
+// @Description 管理员获取所有可用角色
+// @Tags Admin
+// @Produce json
+// @Success 200 {object} model.Response{data=types.AdminRoleListResponse} "获取成功"
+// @Security BearerAuth
+// @Router /api/v1/admin/roles [get]
+func (h *AdminHandler) GetRoles(c *gin.Context) {
+	roles := []types.RoleInfo{
+		{
+			Name:        "user",
+			DisplayName: "普通用户",
+			Description: "拥有基本用户权限",
+		},
+		{
+			Name:        "admin",
+			DisplayName: "管理员",
+			Description: "拥有所有管理权限",
+		},
+	}
+
+	c.JSON(http.StatusOK, model.NewSuccessResponse(types.AdminRoleListResponse{
+		Roles: roles,
+	}))
+}
+
+// SearchTextures 搜索材质
+// @Summary 搜索材质
+// @Description 管理员根据条件搜索材质
+// @Tags Admin
+// @Produce json
+// @Param keyword query string false "搜索关键词"
+// @Param type query string false "材质类型"
+// @Param status query int false "状态筛选"
+// @Param uploader_id query int false "上传者ID"
+// @Param sort_by query string false "排序字段"
+// @Param sort_desc query bool false "是否降序"
+// @Param page query int false "页码"
+// @Param page_size query int false "每页数量"
+// @Success 200 {object} model.Response{data=map[string]interface{}} "搜索成功"
+// @Security BearerAuth
+// @Router /api/v1/admin/textures/search [get]
+func (h *AdminHandler) SearchTextures(c *gin.Context) {
+	var req types.AdminTextureSearchRequest
+	if err := c.ShouldBindQuery(&req); err != nil {
+		RespondBadRequest(c, "参数错误", err)
+		return
+	}
+
+	if req.Page < 1 {
+		req.Page = 1
+	}
+	if req.PageSize < 1 || req.PageSize > 100 {
+		req.PageSize = 20
+	}
+
+	db := h.container.DB.Model(&model.Texture{})
+
+	// 关键词搜索
+	if req.Keyword != "" {
+		db = db.Where("name LIKE ?", "%"+req.Keyword+"%")
+	}
+
+	// 类型筛选
+	if req.Type != "" {
+		db = db.Where("type = ?", req.Type)
+	}
+
+	// 状态筛选
+	if req.Status != nil {
+		db = db.Where("status = ?", *req.Status)
+	}
+
+	// 上传者筛选
+	if req.UploaderID != nil {
+		db = db.Where("uploader_id = ?", *req.UploaderID)
+	}
+
+	// 排序
+	sortBy := "id"
+	if req.SortBy != "" {
+		sortBy = req.SortBy
+	}
+	order := sortBy
+	if req.SortDesc {
+		order += " DESC"
+	}
+	db = db.Order(order)
+
+	// 分页
+	var total int64
+	db.Count(&total)
+
+	var textures []model.Texture
+	db.Preload("Uploader").Offset((req.Page - 1) * req.PageSize).Limit(req.PageSize).Find(&textures)
+
+	// 构建响应
+	textureList := make([]gin.H, len(textures))
+	for i, t := range textures {
+		uploaderName := ""
+		if t.Uploader != nil {
+			uploaderName = t.Uploader.Username
+		}
+		textureList[i] = gin.H{
+			"id":             t.ID,
+			"name":           t.Name,
+			"type":           t.Type,
+			"hash":           t.Hash,
+			"uploader_id":    t.UploaderID,
+			"uploader_name":  uploaderName,
+			"is_public":      t.IsPublic,
+			"download_count": t.DownloadCount,
+			"favorite_count": t.FavoriteCount,
+			"status":         t.Status,
+			"created_at":     t.CreatedAt,
+		}
+	}
+
+	c.JSON(http.StatusOK, model.NewSuccessResponse(gin.H{
+		"textures":  textureList,
+		"total":     total,
+		"page":      req.Page,
+		"page_size": req.PageSize,
+	}))
+}
+
+// UpdateTexture 更新材质
+// @Summary 更新材质
+// @Description 管理员更新材质信息
+// @Tags Admin
+// @Accept json
+// @Produce json
+// @Param id path int true "材质ID"
+// @Param request body types.AdminTextureUpdateRequest true "更新材质请求"
+// @Success 200 {object} model.Response{data=map[string]interface{}} "更新成功"
+// @Failure 400 {object} model.ErrorResponse "参数错误"
+// @Failure 404 {object} model.ErrorResponse "材质不存在"
+// @Security BearerAuth
+// @Router /api/v1/admin/textures/{id} [put]
+func (h *AdminHandler) UpdateTexture(c *gin.Context) {
+	textureID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		RespondBadRequest(c, "无效的材质ID", err)
+		return
+	}
+
+	var req types.AdminTextureUpdateRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		RespondBadRequest(c, "参数错误", err)
+		return
+	}
+
+	// 检查材质是否存在
+	var texture model.Texture
+	if err := h.container.DB.First(&texture, textureID).Error; err != nil {
+		c.JSON(http.StatusNotFound, model.NewErrorResponse(
+			model.CodeNotFound,
+			"材质不存在",
+			nil,
+		))
+		return
+	}
+
+	// 构建更新字段
+	updates := make(map[string]interface{})
+
+	if req.Name != nil {
+		updates["name"] = *req.Name
+	}
+
+	if req.Description != nil {
+		updates["description"] = *req.Description
+	}
+
+	if req.IsPublic != nil {
+		updates["is_public"] = *req.IsPublic
+	}
+
+	if req.Status != nil {
+		updates["status"] = *req.Status
+	}
+
+	// 执行更新
+	if len(updates) > 0 {
+		if err := h.container.DB.Model(&texture).Updates(updates).Error; err != nil {
+			RespondServerError(c, "更新材质失败", err)
+			return
+		}
+	}
+
+	operatorID, _ := c.Get("user_id")
+	h.container.Logger.Info("管理员更新材质",
+		zap.Int64("operator_id", operatorID.(int64)),
+		zap.Int64("texture_id", textureID),
+	)
+
+	c.JSON(http.StatusOK, model.NewSuccessResponse(gin.H{
+		"message":    "材质更新成功",
+		"texture_id": textureID,
+	}))
+}
+
+// BatchDeleteTextures 批量删除材质
+// @Summary 批量删除材质
+// @Description 管理员批量删除多个材质
+// @Tags Admin
+// @Accept json
+// @Produce json
+// @Param request body map[string]interface{} true "批量删除请求"
+// @Success 200 {object} model.Response{data=map[string]interface{}} "删除成功"
+// @Failure 400 {object} model.ErrorResponse "参数错误"
+// @Security BearerAuth
+// @Router /api/v1/admin/textures/batch-delete [delete]
+func (h *AdminHandler) BatchDeleteTextures(c *gin.Context) {
+	var req struct {
+		TextureIDs []int64 `json:"texture_ids" binding:"required,min=1"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		RespondBadRequest(c, "参数错误", err)
+		return
+	}
+
+	operatorID, _ := c.Get("user_id")
+
+	// 批量删除
+	if err := h.container.DB.Where("id IN ?", req.TextureIDs).Delete(&model.Texture{}).Error; err != nil {
+		RespondServerError(c, "批量删除材质失败", err)
+		return
+	}
+
+	h.container.Logger.Info("管理员批量删除材质",
+		zap.Int64("operator_id", operatorID.(int64)),
+		zap.Int("count", len(req.TextureIDs)),
+	)
+
+	c.JSON(http.StatusOK, model.NewSuccessResponse(gin.H{
+		"message": "批量删除材质成功",
+		"count":   len(req.TextureIDs),
+	}))
+}
+
+// GetStats 获取统计信息
+// @Summary 获取统计信息
+// @Description 管理员获取系统统计数据
+// @Tags Admin
+// @Produce json
+// @Success 200 {object} model.Response{data=types.AdminStatsResponse} "获取成功"
+// @Security BearerAuth
+// @Router /api/v1/admin/stats [get]
+func (h *AdminHandler) GetStats(c *gin.Context) {
+	var stats types.AdminStatsResponse
+
+	// 用户统计
+	h.container.DB.Model(&model.User{}).Count(&stats.TotalUsers)
+	h.container.DB.Model(&model.User{}).Where("status = ?", 1).Count(&stats.ActiveUsers)
+	h.container.DB.Model(&model.User{}).Where("status = ?", 0).Count(&stats.BannedUsers)
+	h.container.DB.Model(&model.User{}).Where("role = ?", "admin").Count(&stats.AdminUsers)
+
+	// 材质统计
+	h.container.DB.Model(&model.Texture{}).Count(&stats.TotalTextures)
+	h.container.DB.Model(&model.Texture{}).Where("is_public = ?", true).Count(&stats.PublicTextures)
+	h.container.DB.Model(&model.Texture{}).Where("status = ?", 0).Count(&stats.PendingTextures)
+
+	// 下载和收藏统计
+	h.container.DB.Model(&model.Texture{}).Select("COALESCE(SUM(download_count), 0)").Scan(&stats.TotalDownloads)
+	h.container.DB.Model(&model.Texture{}).Select("COALESCE(SUM(favorite_count), 0)").Scan(&stats.TotalFavorites)
+
+	c.JSON(http.StatusOK, model.NewSuccessResponse(stats))
+}

internal/handler/routes.go

@@ -203,18 +203,28 @@ func registerAdminRoutes(v1 *gin.RouterGroup, c *container.Container, h *AdminHa
 	admin.Use(middleware.RequireAdmin())
 	{
 
+		// 统计信息
+		admin.GET("/stats", h.GetStats)
+
+		// 角色管理
+		admin.GET("/roles", h.GetRoles)
+
 		// 用户管理
 		admin.GET("/users", h.GetUserList)
+		admin.GET("/users/search", h.SearchUsers)
 		admin.GET("/users/:id", h.GetUserDetail)
+		admin.DELETE("/users/:id", h.DeleteUser)
 		admin.PUT("/users/role", h.SetUserRole)
 		admin.PUT("/users/status", h.SetUserStatus)
+		admin.PUT("/users/batch-role", h.BatchSetUserRole)
+		admin.DELETE("/users/batch-delete", h.BatchDeleteUsers)
 
 		// 材质管理（审核）
 		admin.GET("/textures", h.GetTextureList)
+		admin.GET("/textures/search", h.SearchTextures)
+		admin.PUT("/textures/:id", h.UpdateTexture)
 		admin.DELETE("/textures/:id", h.DeleteTexture)
-
-		// 权限管理
-		admin.GET("/permissions", h.GetPermissions)
+		admin.DELETE("/textures/batch-delete", h.BatchDeleteTextures)
 	}
 }
 

internal/types/common.go

@@ -206,3 +206,84 @@ type SystemConfigResponse struct {
 	MaxTexturesPerUser  int    `json:"max_textures_per_user" example:"100"`
 	MaxProfilesPerUser  int    `json:"max_profiles_per_user" example:"5"`
 }
+
+// AdminUserSearchRequest 管理员用户搜索请求
+// @Description 管理员搜索用户请求参数
+type AdminUserSearchRequest struct {
+	PaginationRequest
+	Keyword  string `json:"keyword" form:"keyword" example:"testuser"`
+	Role     string `json:"role" form:"role" binding:"omitempty,oneof=user admin"`
+	Status   *int16 `json:"status" form:"status" binding:"omitempty,oneof=1 0 -1"`
+	SortBy   string `json:"sort_by" form:"sort_by" binding:"omitempty,oneof=id username email points created_at"`
+	SortDesc bool   `json:"sort_desc" form:"sort_desc"`
+}
+
+// AdminUserCreateRequest 管理员创建用户请求
+// @Description 管理员创建用户请求参数
+type AdminUserCreateRequest struct {
+	Username string `json:"username" binding:"required,min=3,max=50" example:"newuser"`
+	Email    string `json:"email" binding:"required,email" example:"user@example.com"`
+	Password string `json:"password" binding:"required,min=6,max=128" example:"password123"`
+	Role     string `json:"role" binding:"required,oneof=user admin" example:"user"`
+	Points   int    `json:"points" binding:"omitempty,min=0" example:"0"`
+}
+
+// AdminUserUpdateRequest 管理员更新用户请求
+// @Description 管理员更新用户请求参数
+type AdminUserUpdateRequest struct {
+	Username *string `json:"username" binding:"omitempty,min=3,max=50" example:"newusername"`
+	Email    *string `json:"email" binding:"omitempty,email" example:"newemail@example.com"`
+	Password *string `json:"password" binding:"omitempty,min=6,max=128" example:"newpassword"`
+	Role     *string `json:"role" binding:"omitempty,oneof=user admin" example:"admin"`
+	Points   *int    `json:"points" binding:"omitempty,min=0" example:"100"`
+	Status   *int16  `json:"status" binding:"omitempty,oneof=1 0 -1"`
+}
+
+// AdminTextureSearchRequest 管理员材质搜索请求
+// @Description 管理员搜索材质请求参数
+type AdminTextureSearchRequest struct {
+	PaginationRequest
+	Keyword    string      `json:"keyword" form:"keyword" example:"skin"`
+	Type       TextureType `json:"type" form:"type" binding:"omitempty,oneof=SKIN CAPE"`
+	Status     *int16      `json:"status" form:"status" binding:"omitempty,oneof=1 0 -1"`
+	UploaderID *int64      `json:"uploader_id" form:"uploader_id" example:"1"`
+	SortBy     string      `json:"sort_by" form:"sort_by" binding:"omitempty,oneof=id name download_count favorite_count created_at"`
+	SortDesc   bool        `json:"sort_desc" form:"sort_desc"`
+}
+
+// AdminTextureUpdateRequest 管理员更新材质请求
+// @Description 管理员更新材质请求参数
+type AdminTextureUpdateRequest struct {
+	Name        *string `json:"name" binding:"omitempty,min=1,max=100" example:"New Skin Name"`
+	Description *string `json:"description" binding:"omitempty,max=500" example:"New description"`
+	IsPublic    *bool   `json:"is_public" example:"true"`
+	Status      *int16  `json:"status" binding:"omitempty,oneof=1 0 -1"`
+}
+
+// AdminRoleListResponse 角色列表响应
+// @Description 角色列表响应数据
+type AdminRoleListResponse struct {
+	Roles []RoleInfo `json:"roles"`
+}
+
+// RoleInfo 角色信息
+// @Description 角色详细信息
+type RoleInfo struct {
+	Name        string `json:"name" example:"admin"`
+	DisplayName string `json:"display_name" example:"管理员"`
+	Description string `json:"description" example:"拥有所有管理权限"`
+}
+
+// AdminStatsResponse 管理员统计信息响应
+// @Description 管理员统计信息
+type AdminStatsResponse struct {
+	TotalUsers      int64 `json:"total_users" example:"100"`
+	ActiveUsers     int64 `json:"active_users" example:"80"`
+	BannedUsers     int64 `json:"banned_users" example:"5"`
+	AdminUsers      int64 `json:"admin_users" example:"3"`
+	TotalTextures   int64 `json:"total_textures" example:"500"`
+	PublicTextures  int64 `json:"public_textures" example:"300"`
+	PendingTextures int64 `json:"pending_textures" example:"10"`
+	TotalDownloads  int64 `json:"total_downloads" example:"1000"`
+	TotalFavorites  int64 `json:"total_favorites" example:"500"`
+}