feat: add weekly summary features and components

- 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.

components/ui/Header.tsx

@@ -53,7 +53,7 @@ export function Header({ title = "TowerControl", subtitle = "Task Management", s
     { href: '/', label: 'Dashboard' },
     { href: '/kanban', label: 'Kanban' },
     { href: '/daily', label: 'Daily' },
-    { href: '/weekly-summary', label: 'Résumé' },
+    { href: '/weekly-summary', label: 'Hebdo' },
     { href: '/tags', label: 'Tags' },
     ...(isJiraConfigured ? [{ href: '/jira-dashboard', label: `Jira${jiraConfig?.projectKey ? ` (${jiraConfig.projectKey})` : ''}` }] : []),
     { href: '/settings', label: 'Settings' }