fix: 修复PowerShell脚本中的编码问题，确保中文正确显示，并优化输出信息

自动同步仓库.ps1

@@ -6,6 +6,13 @@ param(
     [switch]$DryRun = $false
 )
 
+# 设置控制台编码以正确显示中文
+[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
+$OutputEncoding = [System.Text.Encoding]::UTF8
+
+# 设置Git配置以正确处理中文
+$env:LC_ALL = "zh_CN.UTF-8"
+
 function Write-ColorOutput {
     param(
         [string]$Message,
@@ -47,10 +54,10 @@ function Sync-Repositories {
     }
     
     # 检查是否有新的提交
-    $upstreamCommits = git log HEAD..upstream/master --oneline
+    $upstreamCommits = & git log HEAD..upstream/master --oneline | ForEach-Object { [System.Text.Encoding]::UTF8.GetString([System.Text.Encoding]::Default.GetBytes($_)) }
     if ($upstreamCommits) {
         Write-ColorOutput "发现镜像仓库有新的提交:" "Yellow"
-        Write-ColorOutput $upstreamCommits "Gray"
+        $upstreamCommits | ForEach-Object { Write-ColorOutput $_ "Gray" }
         
         if ($UseRebase) {
             Write-ColorOutput "正在使用rebase合并代码..." "Green"
@@ -90,10 +97,10 @@ function Sync-Repositories {
         Write-ColorOutput "镜像仓库没有新的提交，检查本地是否有未推送的修改..." "Blue"
         
         # 检查是否有本地修改需要推送
-        $localCommits = git log origin/master..HEAD --oneline
+        $localCommits = & git log origin/master..HEAD --oneline | ForEach-Object { [System.Text.Encoding]::UTF8.GetString([System.Text.Encoding]::Default.GetBytes($_)) }
         if ($localCommits) {
             Write-ColorOutput "发现本地有未推送的修改:" "Yellow"
-            Write-ColorOutput $localCommits "Gray"
+            $localCommits | ForEach-Object { Write-ColorOutput $_ "Gray" }
             
             Write-ColorOutput ""
             Write-ColorOutput "下一步操作提示:" "Cyan"