Fix GitHub Pages deploy workflow for build-and-deploy job

[Copilot]

The build-and-deploy Actions job was failing during actions/deploy-pages with a 404 when creating the Pages deployment. The workflow built and uploaded artifacts successfully, but lacked required Pages deployment configuration.

• Pages deployment configuration

  • Added job-level Pages environment binding so deploy output maps to the GitHub Pages environment.
  • Exposed deployment URL via steps.deployment.outputs.page_url.

• Workflow setup for Pages

  • Added actions/configure-pages@v5 before build/deploy steps to initialize required Pages context for deploy-pages.

• No app/runtime logic changes

  • Kept frontend build and artifact paths unchanged; this PR is limited to deployment workflow wiring.

jobs:
  build-and-deploy:
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    steps:
      - uses: actions/configure-pages@v5
      - id: deployment
        uses: actions/deploy-pages@v4

[Copilot]

Pull request overview

This PR fixes the GitHub Pages deployment workflow by adding the required Pages initialization and environment binding so actions/deploy-pages can successfully create a Pages deployment and expose the deployed URL.

Changes:

• Binds the build-and-deploy job to the github-pages environment and sets the environment URL from deploy-pages output.
• Adds actions/configure-pages@v5 to initialize Pages context before building/uploading/deploying.

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