CI | Add PR test and release bundle workflows

[BrianGenisio]

Summary

• PR checks now run npm test and npm run build on every pull request.
• Creating a GitHub release attaches a dist.tar.gz with node_modules, the design-system submodule, and the built client.

Changes

These workflows came from ChatCPT. The PR job keeps checkout, Node 22, npm ci, Vitest, and the esbuild client bundle. Axe, Playwright, and Octavus steps are gone because this repo has none of that.

The release tarball is meant to unpack in a new environment and start with node server.js after you add a local .env. It leaves out secrets and local session files (.env, session.config.json, eval-session.json) and source public/app.js, since the served client is public/app.bundle.js.

Test plan

• npm test — 14 files, 108 tests passed
• npm run build — writes public/app.bundle.js
• Confirm the PR workflow goes green on this pull request
• After merge, create a GitHub release and confirm dist.tar.gz is attached

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📥 Commits

Reviewing files that changed from the base of the PR and between a85e51a and e01ebd9.

📒 Files selected for processing (2)

• .github/workflows/pr.yml
• .github/workflows/release.yml

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