fix: move detect_installed after setup_install_dir to avoid empty Test-Path error

scripts/install.ps1

@@ -1190,13 +1190,13 @@ if ($Upgrade -or $Force -or $Source -or $SkipHub -or $InstallDir -or $isIexExecu
     Write-Host "║           HAPI 快速模式                                          ║" -ForegroundColor White
     Write-Host "╚══════════════════════════════════════════════════════════════════╝" -ForegroundColor White
     Write-Host ""
+    Setup-InstallDir
     Detect-Installed
     if ($script:INSTALLED_VERSION) {
         $srcDisplay = $script:INSTALLED_SOURCE
         if ($srcDisplay -like "github:*") { $srcDisplay = $srcDisplay.Substring(7) }
         Write-Info "检测到已安装 HAPI CLI v$($script:INSTALLED_VERSION) (来源: $srcDisplay, 路径: $((Get-Command hapi -ErrorAction SilentlyContinue).Source))"
     }
-    Setup-InstallDir
     Check-Prerequisites
     Run-QuickMode
     exit 0

scripts/install.sh

@@ -1392,6 +1392,7 @@ check_prerequisites() {
 # 快速模式：向后兼容的命令行参数
 # ─────────────────────────────────────────
 run_quick_mode() {
+    setup_install_dir
     detect_installed
 
     if [[ -n "$INSTALLED_VERSION" ]]; then
@@ -1402,7 +1403,6 @@ run_quick_mode() {
         info "检测到已安装 HAPI CLI v$INSTALLED_VERSION (来源: $src_display, 路径: $actual_path)"
     fi
 
-    setup_install_dir
     check_prerequisites
 
     SELECTED_SOURCE=""