fix: Change educoder push to main branch and use file existence check for WiX

Jenkinsfile

@@ -265,7 +265,7 @@ pipeline {
                                 
                                 REM 检查 WiX Toolset 是否安装
                                 set WIX_FOUND=0
-                                where candle.exe >nul 2>&1 && set WIX_FOUND=1
+                                if exist "%WIX_HOME%\\bin\\candle.exe" set WIX_FOUND=1
                                 
                                 if !WIX_FOUND! EQU 0 (
                                     echo ⚠️ 警告: WiX Toolset 未找到，跳过 EXE 打包
@@ -527,9 +527,9 @@ pipeline {
                 expression { currentBuild.result == null || currentBuild.result == 'SUCCESS' || currentBuild.result == 'UNSTABLE' }
             }
             parallel {
-                stage('9.1 推送源代码到 feature-ldl') {
+                stage('9.1 推送源代码到 main') {
                     steps {
-                        echo '========== 推送源代码到头歌 feature-ldl 分支 =========='
+                        echo '========== 推送源代码到头歌 main 分支 =========='
                         script {
                             try {
                                 withCredentials([usernamePassword(
@@ -548,12 +548,12 @@ pipeline {
                                         git config user.name "Jenkins CI"
                                         git config user.email "ldl@chzu.edu.cn"
                                         git remote add educoder https://bdgit.educoder.net/pu6zrsfoy/CHZU_CS231_SEB_lab.git || git remote set-url educoder https://bdgit.educoder.net/pu6zrsfoy/CHZU_CS231_SEB_lab.git
-                                        git push https://%USER_ENC%:%PASS_ENC%@bdgit.educoder.net/pu6zrsfoy/CHZU_CS231_SEB_lab.git HEAD:refs/heads/feature-ldl --force
+                                        git push https://%USER_ENC%:%PASS_ENC%@bdgit.educoder.net/pu6zrsfoy/CHZU_CS231_SEB_lab.git HEAD:refs/heads/main --force
                                     '''
                                 }
-                                echo '✓ 源代码推送到 feature-ldl 成功'
+                                echo '✓ 源代码推送到 main 成功'
                             } catch (Exception e) {
-                                echo '⚠ 推送代码到 feature-ldl 失败'
+                                echo '⚠ 推送代码到 main 失败'
                                 echo "错误信息: ${e.message}"
                                 currentBuild.result = 'UNSTABLE'
                             }