feat: enhance KanbanPageClient and KeyboardShortcuts with new functionality

- Added `toggleFontSize` and `handleToggleDueDateFilter` to `KanbanPageClient` for improved user control over font size and due date visibility.
- Replaced `useKeyboardShortcuts` with `useGlobalKeyboardShortcuts` for better shortcut management across components.
- Updated keyboard shortcuts in `KeyboardShortcutsContext` to include new actions for toggling objectives, due date filters, and font size.
- Refined `KeyboardShortcutsModal` layout for better usability and consistency.
- Removed deprecated `useKeyboardShortcuts` hook to streamline codebase.

src/app/kanban/KanbanPageClient.tsx

@@ -21,7 +21,7 @@ interface KanbanPageClientProps {
 
 function KanbanPageContent() {
   const { syncing, createTask, activeFiltersCount, kanbanFilters, setKanbanFilters } = useTasksContext();
-  const { preferences, updateViewPreferences } = useUserPreferences();
+  const { preferences, updateViewPreferences, toggleFontSize } = useUserPreferences();
   const [isCreateModalOpen, setIsCreateModalOpen] = useState(false);
   const isMobile = useIsMobile(768); // Tailwind md breakpoint
   const searchParams = useSearchParams();
@@ -50,6 +50,13 @@ function KanbanPageContent() {
     updateViewPreferences({ swimlanesByTags: !swimlanesByTags });
   };
 
+  const handleToggleDueDateFilter = () => {
+    setKanbanFilters({ 
+      ...kanbanFilters, 
+      showWithDueDate: !kanbanFilters.showWithDueDate
+    });
+  };
+
   // Handler pour la création de tâche depuis la barre de contrôles
   const handleCreateTask = async (data: CreateTaskData) => {
     await createTask(data);
@@ -62,6 +69,9 @@ function KanbanPageContent() {
     onToggleFilters: handleToggleFilters,
     onToggleCompactView: handleToggleCompactView,
     onToggleSwimlanes: handleToggleSwimlanes,
+    onToggleObjectives: handleToggleObjectives,
+    onToggleDueDateFilter: handleToggleDueDateFilter,
+    onToggleFontSize: toggleFontSize,
     onOpenSearch: () => {
       // Focus sur le champ de recherche dans les contrôles desktop
       const searchInput = document.querySelector('input[placeholder*="Rechercher"]') as HTMLInputElement;