Address code review feedback - use npm scripts and runner.temp

Co-authored-by: tyeth <6692083+tyeth@users.noreply.github.com>

Author: Copilot

.github/workflows/deploy-preview.yml

@@ -83,8 +83,8 @@ jobs:
           # Clean and generate docs first
           npm run clean
           npm run genDocs
-          # Build with the dynamic base href
-          cross-env PARCEL_WORKERS=0 npx parcel build src/index.html --no-optimize --public-url "${{ steps.deployment-path.outputs.base_href }}"
+          # Build with the dynamic base href using custom script
+          npm run parcel:build:custom -- --public-url "${{ steps.deployment-path.outputs.base_href }}"
 
       - name: Checkout gh-pages branch
         id: checkout-gh-pages
@@ -102,8 +102,9 @@ jobs:
         if: steps.checkout-gh-pages.outputs.exists == 'false'
         run: |
           # Create a temporary directory for gh-pages initialization
-          mkdir -p /tmp/gh-pages-init
-          cd /tmp/gh-pages-init
+          TEMP_DIR="${{ runner.temp }}/gh-pages-init"
+          mkdir -p "$TEMP_DIR"
+          cd "$TEMP_DIR"
           git init
           git checkout -b gh-pages
           echo "# GitHub Pages - Preview Deployments" > README.md