更新依赖项，优化 OAuth2 服务，添加 PKCE 支持，增强 OIDC 处理器，新增客户端注册和令牌管理端点，改进数据库模型以支持新功能。

handlers/token.go

@@ -0,0 +1,46 @@
+package handlers
+
+import (
+	"net/http"
+
+	"oidc-oauth2-server/services"
+
+	"github.com/gin-gonic/gin"
+)
+
+type TokenHandler struct {
+	tokenService *services.TokenService
+}
+
+func NewTokenHandler(tokenService *services.TokenService) *TokenHandler {
+	return &TokenHandler{
+		tokenService: tokenService,
+	}
+}
+
+// Revoke 处理令牌撤销请求
+func (h *TokenHandler) Revoke(c *gin.Context) {
+	token := c.PostForm("token")
+	tokenTypeHint := c.PostForm("token_type_hint")
+
+	if err := h.tokenService.RevokeToken(token, tokenTypeHint); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid_request"})
+		return
+	}
+
+	c.Status(http.StatusOK)
+}
+
+// Introspect 处理令牌自省请求
+func (h *TokenHandler) Introspect(c *gin.Context) {
+	token := c.PostForm("token")
+	tokenTypeHint := c.PostForm("token_type_hint")
+
+	result, err := h.tokenService.IntrospectToken(token, tokenTypeHint)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid_request"})
+		return
+	}
+
+	c.JSON(http.StatusOK, result)
+}