Setup CI with GitHub Actions

[yokoberek]

Overview

Add a GitHub Actions CI workflow to automatically validate code quality on every push and pull request to main.

What to implement

Create .github/workflows/ci.yml that runs the following steps in order:

1. Checkout — actions/checkout@v4
2. Setup Node — actions/setup-node@v4 with Node 24 and npm cache
3. Install — npm ci
4. Typecheck — npm run typecheck
5. Lint — npm run lint
6. Test — npm test
7. Build — npm run build

Notes

• Use Node 24 (not 20 or 22). The project uses WXT which depends on packages that require >=22.13.0, and the package-lock.json was generated with npm 11 (ships with Node 24). Using an older Node version causes npm ci to fail due to lock file inconsistencies with optional platform-specific packages (@emnapi/core, @emnapi/runtime).
• The project uses Vite 6 (not 5). WXT 0.20.x uses the filter object syntax in Vite plugin hooks which is a Vite 6 feature — wxt prepare silently breaks with Vite 5.
• Trigger on push and pull_request targeting main.

Acceptance criteria

• CI runs on every push and PR to main
• All steps pass on a clean checkout