feat: 重构日志处理，使用slog包替换原有日志函数，增强日志记录能力

atsf_server/controller/github.go

@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"github.com/gin-contrib/sessions"
 	"github.com/gin-gonic/gin"
+	"log/slog"
 	"net/http"
 	"strconv"
 	"time"
@@ -46,7 +47,7 @@ func getGitHubUserInfoByCode(code string) (*GitHubUser, error) {
 	}
 	res, err := client.Do(req)
 	if err != nil {
-		common.SysLog(err.Error())
+		slog.Error("github oauth access token request failed", "error", err)
 		return nil, errors.New("无法连接至 GitHub 服务器，请稍后重试！")
 	}
 	defer res.Body.Close()
@@ -62,7 +63,7 @@ func getGitHubUserInfoByCode(code string) (*GitHubUser, error) {
 	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", oAuthResponse.AccessToken))
 	res2, err := client.Do(req)
 	if err != nil {
-		common.SysLog(err.Error())
+		slog.Error("github user info request failed", "error", err)
 		return nil, errors.New("无法连接至 GitHub 服务器，请稍后重试！")
 	}
 	defer res2.Body.Close()