- vitest.config.ts: happy-dom environment (so Plan 03's IndexedDB tests
can layer fake-indexeddb on top of happy-dom's window per RESEARCH);
passWithNoTests:false enforces RESEARCH CI Pitfall B (a green CI run
must mean tests *ran*, not 'no tests existed'); include glob covers
src/**/*.test.ts(x) and scripts/**/*.test.mjs.
- playwright.config.ts: testDir 'tests/e2e' (not yet created — first spec
lands in Phase 2 PIPE-07); webServer config wires npm run dev so smoke
tests can self-start the dev server; baseURL pinned to vite default.
- src/__sentinel__.test.ts: a single test asserting 1+1===2 AND that
globalThis.window exists, proving the runner is wired and happy-dom is
active. To be deleted once real tests exist (Plan 03 onward).
- npm test → 1 file, 1 test passed in 593ms.
- npx playwright --version → Version 1.59.1 (matches RESEARCH lock).
