- Install nyc for Istanbul instrumentation
- Add scripts/instrument-frontend.sh to instrument public/*.js
- Add scripts/collect-frontend-coverage.js to extract window.__coverage__
- Add scripts/combined-coverage.sh for combined server+frontend coverage
- Make server.js serve public-instrumented/ when COVERAGE=1 is set
- Add test:full-coverage npm script
- Add public-instrumented/ and .nyc_output/ to .gitignore
