feat: refactor ObjectivesBoard and enhance column visibility management

- Replaced local state management in `ObjectivesBoard` with `useObjectivesCollapse` hook for better state handling.
- Updated collapse button logic to use the new hook's toggle function, improving code clarity.
- Refactored `useColumnVisibility` to load user preferences on mount and persist visibility changes, enhancing user experience.
- Integrated user preferences for Kanban filters in `TasksContext`, allowing for persistent filter settings across sessions.

hooks/useObjectivesVisibility.ts

@@ -0,0 +1,30 @@
+import { useState, useEffect } from 'react';
+import { userPreferencesService } from '@/services/user-preferences';
+
+export function useObjectivesVisibility() {
+  const [showObjectives, setShowObjectives] = useState(true);
+
+  // Charger les préférences au montage
+  useEffect(() => {
+    const saved = userPreferencesService.getViewPreferences();
+    setShowObjectives(saved.showObjectives);
+  }, []);
+
+  const toggleObjectivesVisibility = () => {
+    setShowObjectives(prev => {
+      const newValue = !prev;
+      
+      // Sauvegarder dans localStorage
+      userPreferencesService.updateViewPreferences({
+        showObjectives: newValue
+      });
+      
+      return newValue;
+    });
+  };
+
+  return {
+    showObjectives,
+    toggleObjectivesVisibility
+  };
+}