tools: add offline chat window probe

scripts/test-open-offline-chat-window-probe.ps1

@@ -0,0 +1,62 @@
+param(
+    [string]$HelperExe = "runs/win-helper/ISphereWinHelper.exe"
+)
+
+$ErrorActionPreference = "Stop"
+$repo = Resolve-Path -LiteralPath (Join-Path $PSScriptRoot "..")
+$scriptPath = Join-Path $repo "scripts\open-offline-chat-window-probe.ps1"
+$helperPath = Join-Path $repo $HelperExe
+
+function Assert-True([bool]$Condition, [string]$Message) {
+    if (-not $Condition) {
+        throw $Message
+    }
+}
+
+if (-not (Test-Path -LiteralPath $helperPath)) {
+    & powershell -NoProfile -ExecutionPolicy Bypass -File (Join-Path $repo "scripts\build-win-helper.ps1") | Out-Host
+    if ($LASTEXITCODE -ne 0) {
+        throw "build-win-helper.ps1 failed with exit code $LASTEXITCODE"
+    }
+}
+
+Assert-True (Test-Path -LiteralPath $scriptPath) "missing script: $scriptPath"
+
+$output = & powershell -NoProfile -ExecutionPolicy Bypass -File $scriptPath `
+    -HelperExe $HelperExe `
+    -KeepOpenSeconds 2 `
+    -ProbeClick `
+    -NoScreenshot
+if ($LASTEXITCODE -ne 0) {
+    throw "open-offline-chat-window-probe.ps1 exited with code $LASTEXITCODE. Output: $output"
+}
+
+try {
+    $result = $output | ConvertFrom-Json
+}
+catch {
+    throw "script output was not JSON: $output"
+}
+
+Assert-True ([bool]$result.ok) "result.ok must be true"
+Assert-True ([string]$result.window_kind -eq "offline_chat_window_probe") "window_kind mismatch"
+Assert-True ([string]$result.root_automation_id -eq "frmP2PChat") "root automation id must be frmP2PChat"
+Assert-True ([bool]$result.send_editor_found) "rtbSendMessage must be found"
+Assert-True ([bool]$result.send_button_found) "btnSend must be found"
+Assert-True ([bool]$result.file_button_found) "btnSendFile or btnFile must be found"
+Assert-True ([bool]$result.probe_click_marker_found) "probe click marker must be written"
+Assert-True ([bool]$result.probe_clicked_ui) "probe must click the UI button"
+Assert-True ([bool]$result.probe_typed_text) "probe must type into the send editor"
+Assert-True ([bool]$result.probe_marker_text_matches) "probe marker text must match typed text"
+Assert-True (-not [bool]$result.sent_real_message) "probe must not send a real message"
+Assert-True (-not [bool]$result.uploaded_real_file) "probe must not upload a real file"
+
+[ordered]@{
+    ok = $true
+    script = $scriptPath
+    hwnd = $result.hwnd
+    root_automation_id = $result.root_automation_id
+    send_editor_found = $result.send_editor_found
+    send_button_found = $result.send_button_found
+    probe_click_marker_found = $result.probe_click_marker_found
+} | ConvertTo-Json -Depth 4 -Compress