Add lighthouse accessibility testing job to CI

[rshigg]

Summary

Adds automated Lighthouse accessibility testing on PR push/merge. For now it will only produce warnings.

If we want to see the LH job status in the PRs, we would need the Lighthouse CI Github app installed: https://github.com/apps/lighthouse-ci

Changes

• Create lighthouse ci config
• Add CI job that sets up pnpm, builds the app, then runs lhci

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Project	Deployment	Review	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Jan 25, 2026 8:58pm

[danielroe]

I've now installed the LH GH app - so we probably can use the action without needing to install the cli within the project

[rshigg]

I've now installed the LH GH app - so we probably can use the action without needing to install the cli within the project

Thank you! The only reason I can think of to install the CLI now is if someone wants to create a report locally. But you can always use npx @lhci/cli in that case. I'll remove the dep