整理router，删除多余中单件和路由。退出按键放最上方。

handlers/frontend/view.go

@@ -8,9 +8,11 @@ import (
 
 	"goblog/config"
 	"goblog/database"
+	"goblog/handlers/backend"
 	"goblog/models"
 
 	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
 	"gorm.io/gorm"
 )
 
@@ -54,12 +56,20 @@ func loadSidebarData() (categories []models.Category, tags []models.Tag, postCou
 
 // loginInfo 从上下文提取登录态信息（供侧边栏系统菜单区分已登录/未登录）
 func loginInfo(c *gin.Context) (isLoggedIn bool, loginName string) {
-	if _, ok := c.Get("userID"); !ok {
+	tokenString, _ := c.Cookie("token")
+	if tokenString == "" {
 		return false, ""
 	}
-	name, _ := c.Get("username")
-	loginName, _ = name.(string)
-	return true, loginName
+	claims := &backend.Claims{}
+
+	token, err := jwt.ParseWithClaims(tokenString, claims, func(token *jwt.Token) (interface{}, error) {
+		return backend.JWTSecret(), nil
+	})
+
+	if err == nil && token.Valid {
+		return true, claims.Username
+	}
+	return false, ""
 }
 
 // 首页数据结构