Switch site build to shared GameCult-Quartz

scripts/quartz/quartz.ps1

@@ -6,35 +6,48 @@ param(
 $ErrorActionPreference = "Stop"
 
 $repoRoot = Split-Path -Parent (Split-Path -Parent $PSScriptRoot)
-$quartzRoot = Join-Path $repoRoot "quartz-site"
+$sharedQuartzRoot = if ($env:GAMECULT_QUARTZ_ROOT) {
+    $env:GAMECULT_QUARTZ_ROOT
+} else {
+    Join-Path (Split-Path -Parent $repoRoot) "GameCult-Quartz"
+}
 $portableNodeRoot = Join-Path $repoRoot ".tools\node-v24.15.0-win-x64"
-$portableNpm = Join-Path $portableNodeRoot "npm.cmd"
+$portableNode = Join-Path $portableNodeRoot "node.exe"
 
 # Prefer the bundled Windows runtime so contributors can work without
-# a machine-wide Node install. If it is absent, fall back to npm on PATH.
-if (Test-Path $portableNpm) {
-    $npm = $portableNpm
+# a machine-wide Node install. If it is absent, fall back to node on PATH.
+if (Test-Path $portableNode) {
+    $node = $portableNode
     $env:PATH = "$portableNodeRoot;$env:PATH"
 } else {
-    $npmCommand = Get-Command npm -ErrorAction SilentlyContinue
-    if (-not $npmCommand) {
-        throw "npm was not found. Install Node.js or restore the portable runtime under .tools."
+    $nodeCommand = Get-Command node -ErrorAction SilentlyContinue
+    if (-not $nodeCommand) {
+        throw "node was not found. Install Node.js or restore the portable runtime under .tools."
     }
 
-    $npm = $npmCommand.Source
+    $node = $nodeCommand.Source
 }
 
-# Keep npm's cache inside the repo so local runs stay reproducible.
+# Keep npm's cache inside the repo so local dependency installs stay reproducible.
 $env:npm_config_cache = Join-Path $repoRoot ".npm-cache"
 
-$scriptArgs = switch ($Command) {
-    "build" { @("run", "build") }
-    "dev" { @("run", "dev") }
+if (-not (Test-Path $sharedQuartzRoot)) {
+    throw "GameCult-Quartz was not found at '$sharedQuartzRoot'. Clone it beside this repo or set GAMECULT_QUARTZ_ROOT."
 }
 
-Push-Location $quartzRoot
-try {
-    & $npm @scriptArgs
-} finally {
-    Pop-Location
+$buildScript = Join-Path $sharedQuartzRoot "scripts\build-site.mjs"
+
+if (-not (Test-Path $buildScript)) {
+    throw "GameCult-Quartz build script was not found at '$buildScript'."
 }
+
+$scriptArgs = @(
+    $buildScript,
+    $Command,
+    "--siteRoot", $repoRoot,
+    "--overlayDir", "site",
+    "--contentDir", "GameCult",
+    "--outputDir", "quartz-site/public"
+)
+
+& $node @scriptArgs