Converts the web CI job from ci-typescript-cdk.yaml (typecheck only) to
ci-typescript-frontend.yaml: format:check, build (tsc -b included),
vitest, and a Playwright chromium smoke. Folds the standalone Web Tests
job into it (aggregator needs updated). Pure CI — no AWS secrets.
The smoke (e2e/smoke.spec.ts) drives dev-login → dashboard shell →
proposal list, plus the unauthenticated bounce, against a fully mocked
API (pathname-anchored route interception — a '**/api/**' glob would
swallow vite's /src/lib/api/* module URLs). Config mirrors SHOC's
playwright.config.ts (port 4173, chromium, dev-server webServer).
Prettier: singleQuote + printWidth 100 to match the existing codebase
style; lint intentionally not added (no ESLint config yet — run-lint
false, out of Phase 5 scope). rollback = revert this workflow file.
