Wire frontendCoverage (Vitest 70%/60%/70%) into the check task chain
instead of plain unit tests so commits fail when line or branch coverage
drops. Document thresholds in AGENTS.md and improve pre-commit failure hints.
Co-authored-by: Cursor <cursoragent@cursor.com>
Document that ./gradlew check must pass before every commit. Add scripts
to run the same verification as CI and optionally install a git hook.
Co-authored-by: Cursor <cursoragent@cursor.com>
