fix(installer-ps1): downgrade fallback msg to Write-Warning per critic

claude/uclaude_install.ps1

@@ -152,7 +152,7 @@ try {
         Write-Host "  Models list fetched from config repo ($($cfgJson.models.Count) models)" -ForegroundColor Green
     }
 } catch {
-    Write-Host "  Could not fetch latest models — using fallback list" -ForegroundColor Yellow
+    Write-Warning "Config fetch failed; using fallback model list. Run uclaude_updater.py later to refresh."
 }
 
 # IMPORTANT: only ANTHROPIC_AUTH_TOKEN is set. Setting both AUTH_TOKEN and