feat: use LTS Node.js version for installation

- Replace hardcoded setup_24.x with setup_lts.x for Linux apt/dnf/yum
- Update Windows installer to use Node.js 22 LTS with dynamic version fetch
- Update install messages to reflect LTS instead of specific version
- Fixes: Node.js 24+ requirement causing installation failures on some systems
- Ensures latest LTS version (20.x, 22.x) is used instead of bleeding edge

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

claude/uclaude_update.ps1

@@ -95,12 +95,19 @@ if ($nodeMajor -ge $MIN_NODE_MAJOR) {
         if ((Get-NodeMajor) -ge $MIN_NODE_MAJOR) { $installed = $true }
     }
 
-    # 3. Direct MSI download — Node.js 20 LTS (most compatible)
+    # 3. Direct MSI download — Node.js 22 LTS (most compatible)
     if (-not $installed) {
-        Write-Host "  Downloading Node.js 20 LTS MSI..." -ForegroundColor Yellow
+        Write-Host "  Downloading Node.js 22 LTS MSI..." -ForegroundColor Yellow
         try {
-            $msiUrl  = "https://nodejs.org/dist/v20.18.0/node-v20.18.0-x64.msi"
-            $msiFile = Join-Path $env:TEMP "node-v20-lts.msi"
+            # Try to get latest LTS version dynamically, fallback to known good version
+            $latestLts = "v22.14.0"
+            try {
+                $releases = Invoke-RestMethod -Uri "https://nodejs.org/dist/index.json" -UseBasicParsing -TimeoutSec 10
+                $lts = $releases | Where-Object { $_.lts -and $_.version -match "^v22\." } | Select-Object -First 1
+                if ($lts) { $latestLts = $lts.version }
+            } catch {}
+            $msiUrl  = "https://nodejs.org/dist/$latestLts/node-$latestLts-x64.msi"
+            $msiFile = Join-Path $env:TEMP "node-lts.msi"
             Invoke-WebRequest -Uri $msiUrl -OutFile $msiFile -UseBasicParsing
             Start-Process msiexec.exe -ArgumentList "/i `"$msiFile`" /quiet /norestart" -Wait
             Refresh-Path