fix: update labels in ManagerWeeklySummary and Header components

- Changed header title in `ManagerWeeklySummary` from "Résumé Manager" to "Weekly" for clarity.
- Updated navigation label in `Header` from "Manager" to "Weekly" to maintain consistency across the application.

src/components/ui/Header.tsx

@@ -69,7 +69,7 @@ export function Header({ title = "TowerControl", subtitle = "Task Management", s
     { href: '/', label: 'Dashboard' },
     { href: '/kanban', label: 'Kanban' },
     { href: '/daily', label: 'Daily' },
-    { href: '/weekly-manager', label: 'Manager' },
+    { href: '/weekly-manager', label: 'Weekly' },
     ...(isJiraConfigured ? [{ href: '/jira-dashboard', label: `Jira${jiraConfig?.projectKey ? ` (${jiraConfig.projectKey})` : ''}` }] : []),
     { href: '/settings', label: 'Settings' }
   ];