fix: Windows scripts check Node.js version, use winget OpenJS.NodeJS.V24

BAT and PS1 now detect if installed Node is < v24 and suggest/install
the correct v24 package instead of LTS (v22).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

claude/uclaude_update.ps1

@@ -42,11 +42,22 @@ if (-not $hasPython) {
     }
 }
 
-# Node.js
-if (-not (Test-Command "node")) {
+# Node.js v24+
+$nodeOk = $false
+if (Test-Command "node") {
+    $nodeVer = (node --version) -replace '^v', ''
+    $nodeMajor = [int]($nodeVer -split '\.')[0]
+    if ($nodeMajor -ge 24) {
+        $nodeOk = $true
+    } else {
+        Write-Host "  Node.js v$nodeVer found, need v24+. Upgrading..." -ForegroundColor Yellow
+    }
+} else {
     Write-Host "  Node.js not found." -ForegroundColor Yellow
-    if (-not (Install-WithWinget "OpenJS.NodeJS" "Node.js")) {
-        Write-Host "  Install manually: https://nodejs.org/" -ForegroundColor Yellow
+}
+if (-not $nodeOk) {
+    if (-not (Install-WithWinget "OpenJS.NodeJS.V24" "Node.js v24")) {
+        Write-Host "  Install Node.js v24+ manually: https://nodejs.org/" -ForegroundColor Yellow
     }
 }