- Add PeriodSelectorMini component for global period selection - Add accountingPeriod store for shared period state - Add calendar service/router/model for available periods API - Update Dashboard, Invoices, Trial Balance, Bank/Cash Register views to respect selected period - Fix Trial Balance navigation sync bug (period now syncs on mount) - Update backend services to accept luna/an parameters 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>