feat: 桌面拾取器——UIA 元素拾取（空格确认/Esc 取消）、窗口列表、屏幕区域框选截图，属性面板按能力类型切换网页/桌面拾取

resources/desktop-picker.ps1

@@ -0,0 +1,72 @@
+param([string]$Mode = "element")
+$ErrorActionPreference = "Continue"
+Add-Type -AssemblyName UIAutomationClient, UIAutomationTypes
+Add-Type -AssemblyName System.Windows.Forms
+Add-Type -MemberDefinition "[DllImport(`"user32.dll`")] public static extern short GetAsyncKeyState(int key); [DllImport(`"user32.dll`", CharSet = CharSet.Unicode)] public static extern int GetWindowTextW(IntPtr h, System.Text.StringBuilder sb, int max);" -Name PickW32 -Namespace RpaPick | Out-Null
+
+if ($Mode -eq "windows") {
+  $wins = @()
+  foreach ($p in Get-Process) {
+    if ($p.MainWindowHandle -ne [IntPtr]::Zero -and $p.MainWindowTitle) {
+      $wins += @{ title = $p.MainWindowTitle; process = $p.ProcessName }
+    }
+  }
+  Write-Output (ConvertTo-Json $wins -Compress -AsArray)
+  exit 0
+}
+
+$form = New-Object System.Windows.Forms.Form
+$form.FormBorderStyle = [System.Windows.Forms.FormBorderStyle]::None
+$form.TopMost = $true
+$form.StartPosition = [System.Windows.Forms.FormStartPosition]::Manual
+$form.Location = New-Object System.Drawing.Point(20, 20)
+$form.Size = New-Object System.Drawing.Size(460, 130)
+$form.BackColor = [System.Drawing.Color]::FromArgb(20, 60, 120)
+$label = New-Object System.Windows.Forms.Label
+$label.Dock = [System.Windows.Forms.DockStyle]::Fill
+$label.ForeColor = [System.Drawing.Color]::White
+$label.Font = New-Object System.Drawing.Font("Microsoft YaHei", 11)
+$label.Text = "移动鼠标选择元素..."
+$form.Controls.Add($label)
+$form.Show()
+
+$prevDown = $false
+$result = $null
+while ($true) {
+  $ptX = [System.Windows.Forms.Cursor]::Position.X
+  $ptY = [System.Windows.Forms.Cursor]::Position.Y
+  $point = New-Object System.Windows.Automation.Point($ptX, $ptY)
+  $el = $null
+  try { $el = [System.Windows.Automation.AutomationElement]::FromPoint($point) } catch {}
+  $down = ([RpaPick.PickW32]::GetAsyncKeyState(32) -band 0x8000) -ne 0
+  $esc = ([RpaPick.PickW32]::GetAsyncKeyState(27) -band 0x8000) -ne 0
+  if ($esc) { break }
+  if ($el) {
+    $c = $el.Current
+    $ctrlName = $c.ControlType.ProgrammaticName.Replace("ControlType.", "")
+    $label.Text = "名称: " + $c.Name + [Environment]::NewLine + "类型: " + $ctrlName + [Environment]::NewLine + "空格=拾取  Esc=取消"
+  }
+  if ($down -and $el) {
+    $c = $el.Current
+    $rootName = ""
+    $walker = [System.Windows.Automation.TreeWalker]::ControlViewWalker
+    $anc = $walker.GetParent($el)
+    while ($anc -and -not $anc.Equals([System.Windows.Automation.AutomationElement]::RootElement)) {
+      $h = $anc.Current.NativeWindowHandle
+      if ($h -ne 0) {
+        $sb = New-Object System.Text.StringBuilder 512
+        [RpaPick.PickW32]::GetWindowTextW([IntPtr]$h, $sb, 512) | Out-Null
+        if ($sb.ToString()) { $rootName = $sb.ToString(); break }
+      }
+      $anc = $walker.GetParent($anc)
+    }
+    $ctrlName = $c.ControlType.ProgrammaticName.Replace("ControlType.", "")
+    $result = @{ window = $rootName; name = $c.Name; automationId = $c.AutomationId; controlType = $ctrlName; className = $c.ClassName }
+    break
+  }
+  $prevDown = $down
+  Start-Sleep -Milliseconds 80
+}
+$form.Close()
+
+if ($result) { Write-Output (ConvertTo-Json $result -Compress) } else { Write-Output (ConvertTo-Json @{ cancelled = $true } -Compress) }