Phase 3 (also v2.5.0 in CHANGELOG): - Weekly auto report on Monday - Matplotlib chart hover annotation - Clock-in time distribution histogram - Leave usage calendar with color coding Phase 4 (v2.6.0): - Font scale 100/125/150% (instant apply) - High-contrast mode (black bg + yellow text) - Authenticode signing infra in release.ps1 (env-gated, optional) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>