Migrate production frontend to Static Web Apps

[NewFuture]

Summary

• add Azure Static Web Apps response, cache, MIME, and 404 configuration
• stage the existing production video and deploy the v2 artifact to the Free sticker Static Web App
• retire the main integration frontend deployment and remove all Azure Front Door purge/domain dependencies
• keep Blob $web publishing as an origin-level rollback while Static Web Apps serves production
• test supported Node 20 and current LTS Node 24 instead of the unbounded non-LTS latest release

Validation

• deployed 73 files / 23.94 MiB to salmon-sea-01436e000.7.azurestaticapps.net
• sticker.newfuture.cc is bound to the Static Web App with Azure status Ready
• verified HTTPS redirect, TLS, custom 404, cache headers, HTML routes, manifest MIME, MP4 MIME, and byte-range 206 responses
• clean Windows Node 24.18.0 run passed install, both frontend builds, both test suites, formatting, and all five react-snap routes
• production image domain stickers.newfuture.cc has already moved away from Front Door and returned byte-identical Blob samples

After this PR is merged and the production workflow succeeds, the obsolete stickers-cdn Front Door profile can be deleted.

[Copilot]

Pull request overview

This PR adds Azure Static Web Apps (SWA) support for the production frontend by introducing SWA runtime configuration (headers/MIME/404), staging a production video asset during deployment, and extending the existing GitHub Actions CD workflow to also deploy the v2 artifact to the Free sticker SWA (while keeping the current Blob/Front Door path for rollback).

Changes:

• Add staticwebapp.config.json for SWA caching headers, MIME overrides, and custom 404 handling.
• Update the website build pipeline to ensure Puppeteer is installed before running react-snap.
• Extend fe-cd.yml to stage the production MP4 and deploy v2 builds to Azure Static Web Apps using a deployment token fetched at runtime.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
website/public/staticwebapp.config.json	Adds SWA config for cache headers, MIME types, and 404 rewrite.
website/package.json	Updates snap script to install Puppeteer before running react-snap.
.github/workflows/fe-cd.yml	Stages a video file into the deploy artifact and deploys v2 to SWA using an API token fetched via Azure CLI.

Comments suppressed due to low confidence (1)

website/public/staticwebapp.config.json:40

• This route also uses brace expansion (/*.{html,json,webmanifest,zip}), which isn’t supported by Azure Static Web Apps route matching; the intended caching headers may never be applied for these extensions.

        {
            "route": "/*.{html,json,webmanifest,zip}",
            "headers": {
                "Cache-Control": "public, max-age=604800"
            }

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