CI: run typecheck, lint & Vitest suites on pull requests

[nojibe]

Problem

The only CI workflow that runs on pull requests is .github/workflows/e2e.yml (Playwright). The core quality gates are never enforced in CI, even though the scripts exist in package.json:

• pnpm typecheck (tsc --noEmit)
• pnpm lint (next lint)
• pnpm test:web
• pnpm test:cli

This means type errors, lint violations, and unit-test regressions can land on main without any automated check. The repo even ships a pr-check skill that runs exactly these locally — CI should mirror it.

Dependency

⛔ Blocked by #45 (migrate Jest → Vitest). This workflow should run the Vitest suites, so the migration should land first. Once #45 merges, the test:web / test:cli scripts will invoke vitest run and this workflow wires straight into them — no change needed here beyond referencing the migrated scripts.

Proposed change

Add a .github/workflows/ci.yml that runs on pull_request and push to main:

• Checkout + pnpm/action-setup + actions/setup-node (Node version from .nvmrc, cache: pnpm)
• pnpm install --frozen-lockfile
• Parallel jobs (or steps): typecheck, lint, test:web, test:cli (all Vitest post-Migrate test suites from Jest to Vitest #45)
• Use concurrency to cancel superseded runs (mirror e2e.yml)

Acceptance criteria

• Typecheck, lint, and both Vitest suites run on every PR and block merge on failure
• Node version sourced from .nvmrc (currently pinned there but not in CI)
• Reasonable caching so runs stay fast
• Optionally gate on paths-ignore for docs-only changes, consistent with e2e.yml

References

• Blocked by: Migrate test suites from Jest to Vitest #45
• package.json scripts: typecheck, lint, test:web, test:cli
• Existing pattern: .github/workflows/e2e.yml

[slegarraga]

I will take this one and add the CI workflow with typecheck, lint, and Vitest suites.

[slegarraga]

PR #82 adds the CI workflow for typecheck and the Vitest suites, plus the typecheck fixes needed to make it green. pnpm lint still needs an ESLint setup follow-up because next lint currently prompts for configuration.