新增客户端管理功能，包括创建、编辑和删除客户端的API，更新用户管理功能，添加用户创建和编辑页面，优化管理员功能，增强用户和客户端的管理体验。

handlers/admin_handler.go

@@ -1,6 +1,7 @@
 package handlers
 
 import (
+	"math"
 	"net/http"
 	"strconv"
 
@@ -11,11 +12,12 @@ import (
 )
 
 type AdminHandler struct {
-	adminService *services.AdminService
+	adminService  *services.AdminService
+	clientService *services.ClientService
 }
 
-func NewAdminHandler(adminService *services.AdminService) *AdminHandler {
-	return &AdminHandler{adminService: adminService}
+func NewAdminHandler(adminService *services.AdminService, clientService *services.ClientService) *AdminHandler {
+	return &AdminHandler{adminService: adminService, clientService: clientService}
 }
 
 func (h *AdminHandler) ShowAdminLogin(c *gin.Context) {
@@ -63,20 +65,153 @@ func (h *AdminHandler) ListUsers(c *gin.Context) {
 	})
 }
 
+// ListClients 显示客户端列表页面
 func (h *AdminHandler) ListClients(c *gin.Context) {
-	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
-	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
+	page := 1
+	pageSize := 10
 
-	clients, total, err := h.adminService.ListClients(page, pageSize)
+	// 从查询参数获取分页信息
+	if pageStr := c.Query("page"); pageStr != "" {
+		if p, err := strconv.Atoi(pageStr); err == nil && p > 0 {
+			page = p
+		}
+	}
+	if pageSizeStr := c.Query("page_size"); pageSizeStr != "" {
+		if ps, err := strconv.Atoi(pageSizeStr); err == nil && ps > 0 {
+			pageSize = ps
+		}
+	}
+
+	// 获取客户端列表
+	clients, total, err := h.clientService.GetClients(page, pageSize)
 	if err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.HTML(http.StatusInternalServerError, "error.html", gin.H{
+			"error": err.Error(),
+		})
 		return
 	}
 
 	c.HTML(http.StatusOK, "admin_clients.html", gin.H{
 		"clients":  clients,
-		"total":    total,
 		"page":     page,
 		"pageSize": pageSize,
+		"total":    total,
+		"lastPage": int(math.Ceil(float64(total) / float64(pageSize))),
 	})
 }
+
+// ShowCreateUser 显示创建用户页面
+func (h *AdminHandler) ShowCreateUser(c *gin.Context) {
+	c.HTML(http.StatusOK, "admin_create_user.html", gin.H{
+		"title": "创建用户",
+	})
+}
+
+// HandleCreateUser 处理创建用户请求
+func (h *AdminHandler) HandleCreateUser(c *gin.Context) {
+	username := c.PostForm("username")
+	password := c.PostForm("password")
+	email := c.PostForm("email")
+
+	if username == "" || password == "" || email == "" {
+		c.HTML(http.StatusBadRequest, "admin_create_user.html", gin.H{
+			"title": "创建用户",
+			"error": "用户名、密码和邮箱都不能为空",
+		})
+		return
+	}
+
+	_, err := h.adminService.CreateUser(username, password, email)
+	if err != nil {
+		c.HTML(http.StatusBadRequest, "admin_create_user.html", gin.H{
+			"title": "创建用户",
+			"error": "创建用户失败：" + err.Error(),
+		})
+		return
+	}
+
+	c.Redirect(http.StatusFound, "/admin/users")
+}
+
+// ShowEditUser 显示编辑用户页面
+func (h *AdminHandler) ShowEditUser(c *gin.Context) {
+	userID, err := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err != nil {
+		c.HTML(http.StatusBadRequest, "error.html", gin.H{
+			"error": "无效的用户ID",
+		})
+		return
+	}
+
+	user, err := h.adminService.GetUser(uint(userID))
+	if err != nil {
+		c.HTML(http.StatusNotFound, "error.html", gin.H{
+			"error": "用户不存在",
+		})
+		return
+	}
+
+	c.HTML(http.StatusOK, "admin_edit_user.html", gin.H{
+		"title": "编辑用户",
+		"user":  user,
+	})
+}
+
+// HandleEditUser 处理编辑用户请求
+func (h *AdminHandler) HandleEditUser(c *gin.Context) {
+	userID, err := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的用户ID"})
+		return
+	}
+
+	username := c.PostForm("username")
+	email := c.PostForm("email")
+	isActiveStr := c.PostForm("is_active")
+	var isActive *bool
+	if isActiveStr != "" {
+		active := isActiveStr == "true"
+		isActive = &active
+	}
+
+	_, err = h.adminService.UpdateUser(uint(userID), username, email, isActive)
+	if err != nil {
+		c.HTML(http.StatusBadRequest, "admin_edit_user.html", gin.H{
+			"title": "编辑用户",
+			"error": "更新用户失败：" + err.Error(),
+		})
+		return
+	}
+
+	// 如果提供了新密码，则更新密码
+	newPassword := c.PostForm("password")
+	if newPassword != "" {
+		err = h.adminService.UpdateUserPassword(uint(userID), newPassword)
+		if err != nil {
+			c.HTML(http.StatusBadRequest, "admin_edit_user.html", gin.H{
+				"title": "编辑用户",
+				"error": "更新密码失败：" + err.Error(),
+			})
+			return
+		}
+	}
+
+	c.Redirect(http.StatusFound, "/admin/users")
+}
+
+// HandleDeleteUser 处理删除用户请求
+func (h *AdminHandler) HandleDeleteUser(c *gin.Context) {
+	userID, err := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的用户ID"})
+		return
+	}
+
+	err = h.adminService.DeleteUser(uint(userID))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "删除用户失败：" + err.Error()})
+		return
+	}
+
+	c.Redirect(http.StatusFound, "/admin/users")
+}