MSIX build: report failures as CI annotations

Author: Kanak234

packaging/windows/build_msix.ps1

@@ -3,6 +3,21 @@
 # FLOW: icons → PyInstaller one-folder → --selftest (real compile with bundled GCC)
 #       → layout + AppxManifest (version from medha/__init__.py) → makeappx pack → zip
 $ErrorActionPreference = "Stop"
+# CI visibility: any failure becomes a GitHub annotation (readable on the run page
+# without signing in), including the last lines of output collected in $global:Tail.
+$global:Tail = New-Object System.Collections.Generic.List[string]
+function Run($step, [scriptblock]$cmd) {
+  Write-Host "::group::$step"
+  & $cmd 2>&1 | ForEach-Object { $l = "$_"; Write-Host $l; $global:Tail.Add($l); if ($global:Tail.Count -gt 25) { $global:Tail.RemoveAt(0) } }
+  $code = $LASTEXITCODE
+  Write-Host "::endgroup::"
+  if ($code -ne 0) { throw "STEP FAILED: $step (exit $code)" }
+}
+trap {
+  $msg = ($_ | Out-String) + "`n--- last output ---`n" + ($global:Tail -join "`n")
+  Write-Host ("::error title=MSIX build failed::" + ($msg -replace "`r?`n", "%0A"))
+  exit 1
+}
 # Identity values are in AppxManifest.xml (copied from Partner Center → Product identity).
 $root = Resolve-Path "$PSScriptRoot\..\.."
 Set-Location $root
@@ -11,10 +26,9 @@ $msixVer = "$ver.0"                                      # MSIX needs 4 parts: 2
 $layout = Join-Path $root "dist\msix-layout"
 Remove-Item -Recurse -Force $layout -ErrorAction SilentlyContinue
 New-Item -ItemType Directory -Force "$layout\Assets" | Out-Null
-python packaging\windows\make_icons.py docs\assets\logo-mark.svg "$layout\Assets"
-python -m PyInstaller --noconfirm --distpath dist packaging\windows\medha_windows.spec
-& dist\MEDHA\MEDHA.exe --selftest | Tee-Object -Variable st
-if ($LASTEXITCODE -ne 0) { throw "MEDHA.exe --selftest failed" }
+Run "icons" { python packaging\windows\make_icons.py docs\assets\logo-mark.svg "$layout\Assets" }
+Run "PyInstaller build" { python -m PyInstaller --noconfirm --distpath dist packaging\windows\medha_windows.spec }
+Run "MEDHA.exe --selftest" { & dist\MEDHA\MEDHA.exe --selftest }
 Copy-Item -Recurse dist\MEDHA "$layout\MEDHA"
 (Get-Content packaging\windows\AppxManifest.xml -Raw).Replace("__VERSION__", $msixVer) | Set-Content "$layout\AppxManifest.xml" -Encoding utf8
 $makeappx = Get-ChildItem "${env:ProgramFiles(x86)}\Windows Kits\10\bin\*\x64\makeappx.exe" | Sort-Object FullName -Descending | Select-Object -First 1