- Introduced `CategoryBreakdown`, `JiraWeeklyMetrics`, `PeriodSelector`, and `VelocityMetrics` components to enhance the weekly summary dashboard.
- Updated `WeeklySummaryClient` to manage period selection and PDF export functionality.
- Enhanced `WeeklySummaryService` to support period comparisons and activity categorization.
- Added new API route for fetching weekly summary data based on selected period.
- Updated `package.json` and `package-lock.json` to include `jspdf` and related types for PDF generation.
- Marked several tasks as complete in `TODO.md` to reflect progress on summary features.
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