fix: 拾取循环补回 DoEvents 消息泵（v3 重写时丢失）

resources/desktop-picker.ps1

@@ -130,6 +130,7 @@ while ($true) {
   } catch {
     Write-PickLog ("LOOP ERR: " + $_.Exception.Message)
   }
+  [System.Windows.Forms.Application]::DoEvents()
   Start-Sleep -Milliseconds 60
 }
 $info.Close()