fix: protect against null .Trim() and Get-ScheduledTask crashes; add pause before exit in pipe mode

scripts/install.ps1

@@ -205,7 +205,7 @@ function Detect-Installed {
                 $script:INSTALLED_SOURCE = "github-unknown"
             }
         } else {
-            $npmPrefix = (& npm config get prefix 2>$null).Trim()
+            $npmPrefix = try { (& npm config get prefix 2>$null).Trim() } catch { "" }
             if ($path -like "$npmPrefix*") {
                 $script:INSTALLED_SOURCE = "npm"
             } else {
@@ -423,7 +423,7 @@ function Install-FromNpm {
     Update-EnvPath
     $hapi = Get-Command "hapi" -ErrorAction SilentlyContinue
     if (-not $hapi) {
-        $npmPrefix = (& npm config get prefix).Trim()
+        $npmPrefix = try { (& npm config get prefix).Trim() } catch { "" }
         $npmBin = Join-Path $npmPrefix ""
         [System.Environment]::SetEnvironmentVariable("Path", "$env:Path;$npmBin", "User")
         Update-EnvPath
@@ -629,7 +629,7 @@ function Uninstall-Hapi {
             Remove-Item $path -Force -ErrorAction SilentlyContinue
             Write-Info "已删除 $path"
         } else {
-            $npmPrefix = (& npm config get prefix 2>$null).Trim()
+            $npmPrefix = try { (& npm config get prefix 2>$null).Trim() } catch { "" }
             if ($path -like "$npmPrefix*") {
                 Write-Info "从 npm 卸载 HAPI CLI..."
                 & npm uninstall -g $script:NPM_PACKAGE 2>$null | Out-File $LOG_FILE -Append
@@ -712,8 +712,8 @@ function Collect-Status {
         $script:STATUS_HUB_CONFIGURED = $true
     }
 
-    $hubTask = Get-ScheduledTask -TaskName "HAPI Hub" -ErrorAction SilentlyContinue
-    $runnerTask = Get-ScheduledTask -TaskName "HAPI Runner" -ErrorAction SilentlyContinue
+    $hubTask = try { Get-ScheduledTask -TaskName "HAPI Hub" -ErrorAction Stop } catch { $null }
+    $runnerTask = try { Get-ScheduledTask -TaskName "HAPI Runner" -ErrorAction Stop } catch { $null }
     if ($hubTask) {
         $script:STATUS_AUTOSTART_HUB = $hubTask.State
     }
@@ -1061,10 +1061,12 @@ Print-Status
 if ($isIexExecution) {
     if ($Upgrade) {
         Invoke-Upgrade
+        Read-Host "按 Enter 退出..."
         exit
     }
     if ($Force -or $Source -or $SkipHub -or $InstallDir) {
         Invoke-Install
+        Read-Host "按 Enter 退出..."
         exit
     }
     if (-not $script:STATUS_CLI_INSTALLED) {
@@ -1072,6 +1074,8 @@ if ($isIexExecution) {
         Write-Warn "HAPI CLI 未安装"
         Write-Warn "请使用 -Source / -Force 等参数指定操作，或直接运行 install.ps1 进入交互模式"
     }
+    Write-Host ""
+    Read-Host "按 Enter 退出..."
     exit
 }