chore(#94): beta version 1.1.2-beta.1+31 + self-contained Windows packaging (#96)

- pubspec 1.1.2+30 -> 1.1.2-beta.1+31: the app self-identifies as the public beta
  heading toward 1.1.2 final.
- scripts/package-windows.ps1 (#96): builds the distributable zip and BUNDLES the
  VC++ runtime DLLs (msvcp140 / vcruntime140*) that Flutter's Windows build omits,
  so the zip launches on a clean machine without the redistributable installed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 1.1.2+30
+version: 1.1.2-beta.1+31
 
 environment:
   sdk: ^3.9.2

scripts/package-windows.ps1

@@ -0,0 +1,45 @@
+# Package the Windows release as a self-contained distributable zip (#96).
+#
+# Flutter's Windows build is NOT self-contained — it depends on the MSVC runtime
+# (msvcp140.dll / vcruntime140*.dll), which a clean machine may not have, so the
+# exe fails to launch. This bundles those redistributable DLLs into the zip.
+#
+# Run AFTER `flutter build windows --release`:
+#   & C:\Dev\flutter-meshcore\bin\dart.bat   # (not needed)
+#   pwsh -File scripts/package-windows.ps1
+$ErrorActionPreference = 'Stop'
+
+$root = (Resolve-Path (Join-Path $PSScriptRoot '..')).Path
+$rel  = Join-Path $root 'build\windows\x64\runner\Release'
+$exe  = Join-Path $rel 'offband_meshcore.exe'
+if (-not (Test-Path $exe)) {
+  throw "Run 'flutter build windows --release' first - missing $exe"
+}
+
+# Release name = the pubspec build-name (e.g. 1.1.2-beta.1), without the +build.
+$verLine = (Select-String -Path (Join-Path $root 'pubspec.yaml') -Pattern '^version:\s*(\S+)').Matches[0].Groups[1].Value
+$buildName = ($verLine -split '\+')[0]
+$name = "OffbandMeshcore-$buildName"
+
+$dist  = Join-Path $root 'dist'
+$stage = Join-Path $dist $name
+New-Item -ItemType Directory -Force $dist | Out-Null
+if (Test-Path $stage) { Remove-Item -Recurse -Force $stage }
+Copy-Item -Recurse -Path $rel -Destination $stage
+
+# Bundle the VC++ runtime (Microsoft-redistributable copies from VS BuildTools).
+$crt = Get-ChildItem 'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Redist\MSVC' -Directory |
+  Where-Object { $_.Name -match '^\d' } | Sort-Object Name -Descending |
+  ForEach-Object { Get-ChildItem (Join-Path $_.FullName 'x64') -Directory -Filter '*CRT*' } |
+  Select-Object -First 1
+if (-not $crt) { throw 'VC++ redist CRT folder not found under VS BuildTools' }
+foreach ($d in 'msvcp140.dll','vcruntime140.dll','vcruntime140_1.dll','msvcp140_1.dll') {
+  Copy-Item (Join-Path $crt.FullName $d) (Join-Path $stage $d) -Force
+}
+
+$zip = Join-Path $dist "$name-win-x64.zip"
+if (Test-Path $zip) { Remove-Item -Force $zip }
+Compress-Archive -Path $stage -DestinationPath $zip -CompressionLevel Optimal
+Remove-Item -Recurse -Force $stage
+$mb = [math]::Round((Get-Item $zip).Length / 1MB, 1)
+Write-Output "Packaged: $zip ($mb MB) - VC++ runtime bundled, extracts to $name\"