更新 Go 版本至 1.23.0，添加管理员功能，包括管理员登录、用户和客户端管理，新增相应的模板和中间件，优化数据库模型以支持管理员管理。

main.go

@@ -10,8 +10,10 @@ import (
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 
+	"html/template"
 	"oidc-oauth2-server/config"
 	"oidc-oauth2-server/handlers"
+	"oidc-oauth2-server/middleware"
 	"oidc-oauth2-server/models"
 	"oidc-oauth2-server/services"
 )
@@ -41,11 +43,20 @@ func main() {
 	}
 	clientService := services.NewClientService(db)
 	tokenService := services.NewTokenService(db, oauthService.GetKeyManager())
+	adminService := services.NewAdminService(db)
 
 	// 设置 Gin 路由
 	r := gin.Default()
 
 	// 设置模板目录
+	r.SetFuncMap(template.FuncMap{
+		"subtract": func(a, b int) int {
+			return a - b
+		},
+		"add": func(a, b int) int {
+			return a + b
+		},
+	})
 	r.LoadHTMLGlob("templates/*")
 
 	// 设置 session 中间件
@@ -64,10 +75,13 @@ func main() {
 	oidcHandler := handlers.NewOIDCHandler(config.GlobalConfig.OAuth.IssuerURL, oauthService, authService)
 	registrationHandler := handlers.NewRegistrationHandler(clientService)
 	tokenHandler := handlers.NewTokenHandler(tokenService)
+	adminHandler := handlers.NewAdminHandler(adminService)
 
 	// 认证路由
 	r.GET("/login", authHandler.ShowLogin)
 	r.POST("/login", authHandler.HandleLogin)
+	r.GET("/signup", authHandler.ShowSignup)
+	r.POST("/signup", authHandler.HandleSignup)
 
 	// OIDC 端点
 	r.GET("/.well-known/openid-configuration", oidcHandler.OpenIDConfiguration)
@@ -86,6 +100,22 @@ func main() {
 	r.POST("/revoke", tokenHandler.Revoke)
 	r.POST("/introspect", tokenHandler.Introspect)
 
+	// 管理后台路由
+	admin := r.Group("/admin")
+	{
+		admin.GET("/login", adminHandler.ShowAdminLogin)
+		admin.POST("/login", adminHandler.HandleAdminLogin)
+
+		// 需要管理员认证的路由
+		authorized := admin.Group("/")
+		authorized.Use(middleware.AdminAuthRequired())
+		{
+			authorized.GET("/dashboard", adminHandler.Dashboard)
+			authorized.GET("/users", adminHandler.ListUsers)
+			authorized.GET("/clients", adminHandler.ListClients)
+		}
+	}
+
 	// 启动服务器
 	addr := fmt.Sprintf("%s:%d", config.GlobalConfig.Server.Host, config.GlobalConfig.Server.Port)
 	log.Printf("Starting server on %s", addr)