Scans test files at startup and warns when vi.mock() targets internal
modules (relative paths or @multica/* packages). Reports file paths
and line numbers for all violations without interfering with test
execution.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add Vitest and @vitest/coverage-v8 for unit testing. Configure
test scripts and add coverage directory to gitignore.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>