Add Windows build script

Wraps `task package` with prerequisite checks (Node, Go, Zig, Task)
for users building the Windows installer locally.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W9bu5FCyue74RQbpEgQBxm

Author: claude

BUILD.md

@@ -127,6 +127,8 @@ If you're on Linux ARM64, run the following:
 USE_SYSTEM_FPM=1 task package
 ```
 
+On Windows, you can instead run `scripts/build-windows.ps1`, which checks for the required prerequisites (Node, Go, Zig, Task) before invoking `task package`.
+
 ## Debugging
 
 ### Frontend logs

scripts/build-windows.ps1

@@ -0,0 +1,93 @@
+<#
+.SYNOPSIS
+    Builds a Windows installer/executable for Wave Terminal.
+
+.DESCRIPTION
+    Wraps the project's Task-based build pipeline (`task package`) to produce
+    Windows artifacts (.exe / .msi / .zip) in the `make/` directory.
+
+    This script must be run on a Windows machine. Cross-compiling a working
+    Windows installer from Linux/macOS is not supported by this project's
+    build tooling.
+
+    Prerequisites (see BUILD.md for full details):
+      - Node.js 22 LTS          https://nodejs.org/en/download
+      - Go                      https://go.dev/doc/install
+      - Zig (for CGO)           https://ziglang.org/learn/getting-started/#managers
+      - Task                    https://taskfile.dev/installation/
+
+    The resulting build is unsigned unless you set the code-signing
+    environment variables electron-builder expects (CSC_LINK / CSC_KEY_PASSWORD,
+    or the DigiCert Keylocker SM_* variables used in CI - see
+    .github/workflows/build-helper.yml for reference).
+
+.PARAMETER Clean
+    Remove the `make/` and `dist/` directories before building.
+
+.EXAMPLE
+    ./scripts/build-windows.ps1
+
+.EXAMPLE
+    ./scripts/build-windows.ps1 -Clean
+#>
+
+[CmdletBinding()]
+param(
+    [switch]$Clean
+)
+
+$ErrorActionPreference = "Stop"
+
+function Test-Command {
+    param([string]$Name)
+    return [bool](Get-Command $Name -ErrorAction SilentlyContinue)
+}
+
+if ($env:OS -ne "Windows_NT") {
+    Write-Host "This script must be run on Windows (it builds a native Windows installer)." -ForegroundColor Red
+    exit 1
+}
+
+Write-Host "==> Checking prerequisites..." -ForegroundColor Cyan
+
+$missing = @()
+if (-not (Test-Command "node")) { $missing += "Node.js 22 LTS - https://nodejs.org/en/download" }
+if (-not (Test-Command "go")) { $missing += "Go - https://go.dev/doc/install" }
+if (-not (Test-Command "zig")) { $missing += "Zig - https://ziglang.org/learn/getting-started/#managers" }
+if (-not (Test-Command "task")) { $missing += "Task - https://taskfile.dev/installation/" }
+
+if ($missing.Count -gt 0) {
+    Write-Host "Missing required tools:" -ForegroundColor Red
+    foreach ($m in $missing) { Write-Host "  - $m" -ForegroundColor Red }
+    Write-Host ""
+    Write-Host "See BUILD.md ('Windows' section) for setup instructions." -ForegroundColor Yellow
+    exit 1
+}
+
+# Repo root is one directory up from this script.
+$repoRoot = Split-Path -Parent $PSScriptRoot
+Push-Location $repoRoot
+try {
+    if ($Clean) {
+        Write-Host "==> Cleaning make/ and dist/..." -ForegroundColor Cyan
+        task clean
+    }
+
+    Write-Host "==> Building and packaging Wave Terminal for Windows (task package)..." -ForegroundColor Cyan
+    Write-Host "    This installs npm/go dependencies, builds wavesrv + wsh, then runs electron-builder." -ForegroundColor DarkGray
+    task package
+
+    Write-Host ""
+    $artifacts = Get-ChildItem -Path (Join-Path $repoRoot "make") -Include *.exe, *.msi, *.zip -File -Recurse -ErrorAction SilentlyContinue
+    if ($artifacts) {
+        Write-Host "==> Build complete. Artifacts:" -ForegroundColor Green
+        foreach ($a in $artifacts) { Write-Host "  $($a.FullName)" -ForegroundColor Green }
+    }
+    else {
+        Write-Host "==> Build finished, but no .exe/.msi/.zip files were found under make/." -ForegroundColor Yellow
+        Write-Host "    Check the output above for errors." -ForegroundColor Yellow
+    }
+}
+finally {
+    Pop-Location
+}