feat: integrate global keyboard shortcuts across multiple components

- Added `KeyboardShortcutsProvider` to `RootLayout` for centralized keyboard shortcut management.
- Implemented `useGlobalKeyboardShortcuts` in `DailyPageClient`, `KanbanPageClient`, and `HomePageClient` to enhance navigation and task management with keyboard shortcuts.
- Updated `KeyboardShortcuts` component to render a modal for displaying available shortcuts, improving user accessibility.
- Enhanced `Header` component with buttons to open the keyboard shortcuts modal, streamlining user interaction.

src/app/kanban/KanbanPageClient.tsx

@@ -12,6 +12,7 @@ import { CreateTaskForm } from '@/components/forms/CreateTaskForm';
 import { MobileControls } from '@/components/kanban/MobileControls';
 import { DesktopControls } from '@/components/kanban/DesktopControls';
 import { useIsMobile } from '@/hooks/useIsMobile';
+import { useGlobalKeyboardShortcuts } from '@/hooks/useGlobalKeyboardShortcuts';
 
 interface KanbanPageClientProps {
   initialTasks: Task[];
@@ -55,6 +56,19 @@ function KanbanPageContent() {
     setIsCreateModalOpen(false);
   };
 
+  // Raccourcis clavier globaux pour la page Kanban
+  useGlobalKeyboardShortcuts({
+    onCreateTask: () => setIsCreateModalOpen(true),
+    onToggleFilters: handleToggleFilters,
+    onToggleCompactView: handleToggleCompactView,
+    onToggleSwimlanes: handleToggleSwimlanes,
+    onOpenSearch: () => {
+      // Focus sur le champ de recherche dans les contrôles desktop
+      const searchInput = document.querySelector('input[placeholder*="Rechercher"]') as HTMLInputElement;
+      searchInput?.focus();
+    }
+  });
+
   return (
     <div className="min-h-screen bg-[var(--background)]">
       <Header