- Added `merge-coverage.ts` to combine Jest and Playwright coverage into a unified report with comprehensive statistics and thresholds.
- Included `convert-v8-to-istanbul.ts` for transforming Playwright V8 coverage into Istanbul format, enabling seamless merging.
- Introduced E2E coverage helpers for Playwright tests (`startCoverage`, `stopAndSaveCoverage`, `withCoverage`) to collect and process both V8 and Istanbul coverage.
- Configured `.nycrc.json` with coverage thresholds and reporting formats for improved visibility and enforcement.
