refactor: simplify swimlane mode handling in KanbanFilters

- Removed swimlane mode toggle and dropdown, streamlining the swimlane mode functionality.
- Updated `handleSwimlanesToggle` to cycle through swimlane modes directly, enhancing clarity and usability.
- Cleaned up unused state and refs related to swimlane mode, improving component performance and maintainability.

src/components/kanban/KanbanFilters.tsx

@@ -32,10 +32,8 @@ export function KanbanFilters({ filters, onFiltersChange, hiddenStatuses: propsH
   const hiddenStatuses = propsHiddenStatuses || new Set(preferences.columnVisibility.hiddenStatuses);
   const toggleStatusVisibility = onToggleStatusVisibility || toggleColumnVisibility;
   const [isSortExpanded, setIsSortExpanded] = useState(false);
-  const [isSwimlaneModeExpanded, setIsSwimlaneModeExpanded] = useState(false);
   const isMobile = useIsMobile(768); // Tailwind md breakpoint
   const sortDropdownRef = useRef<HTMLDivElement>(null);
-  const swimlaneModeDropdownRef = useRef<HTMLDivElement>(null);
   const sortButtonRef = useRef<HTMLButtonElement>(null);
   const [dropdownPosition, setDropdownPosition] = useState({ top: 0, left: 0 });
 
@@ -45,16 +43,13 @@ export function KanbanFilters({ filters, onFiltersChange, hiddenStatuses: propsH
       if (sortDropdownRef.current && !sortDropdownRef.current.contains(event.target as Node)) {
         setIsSortExpanded(false);
       }
-      if (swimlaneModeDropdownRef.current && !swimlaneModeDropdownRef.current.contains(event.target as Node)) {
-        setIsSwimlaneModeExpanded(false);
-      }
     }
 
-    if (isSortExpanded || isSwimlaneModeExpanded) {
+    if (isSortExpanded) {
       document.addEventListener('mousedown', handleClickOutside);
       return () => document.removeEventListener('mousedown', handleClickOutside);
     }
-  }, [isSortExpanded, isSwimlaneModeExpanded]);
+  }, [isSortExpanded]);
 
   // Handler pour la recherche avec debounce intégré
   const handleSearchChange = (search: string) => {
@@ -87,30 +82,31 @@ export function KanbanFilters({ filters, onFiltersChange, hiddenStatuses: propsH
 
 
   const handleSwimlanesToggle = () => {
-    onFiltersChange({ 
-      ...filters, 
-      swimlanesByTags: !filters.swimlanesByTags
-    });
-  };
-
-  const handleSwimlaneModeChange = (mode: 'tags' | 'priority') => {
+    // Cycle entre les 3 modes : Normal → Par tags → Par priorité → Normal
+    if (!filters.swimlanesByTags) {
+      // Normal → Par tags
       onFiltersChange({
         ...filters,
         swimlanesByTags: true,
-      swimlanesMode: mode
+        swimlanesMode: 'tags'
       });
-    setIsSwimlaneModeExpanded(false);
+    } else if (filters.swimlanesMode === 'tags') {
+      // Par tags → Par priorité
+      onFiltersChange({
+        ...filters,
+        swimlanesByTags: true,
+        swimlanesMode: 'priority'
+      });
+    } else {
+      // Par priorité → Normal
+      onFiltersChange({
+        ...filters,
+        swimlanesByTags: false,
+        swimlanesMode: undefined
+      });
+    }
   };
 
-  const handleSwimlaneModeToggle = (event: React.MouseEvent<HTMLButtonElement>) => {
-    const button = event.currentTarget;
-    const rect = button.getBoundingClientRect();
-    setDropdownPosition({
-      top: rect.bottom + window.scrollY + 4,
-      left: rect.left + window.scrollX
-    });
-    setIsSwimlaneModeExpanded(!isSwimlaneModeExpanded);
-  };
 
   const handleSortChange = (sortKey: string) => {
     onFiltersChange({ 
@@ -186,23 +182,6 @@ export function KanbanFilters({ filters, onFiltersChange, hiddenStatuses: propsH
                 }
               </ToggleButton>
               
-              {/* Bouton pour changer le mode des swimlanes */}
-              {filters.swimlanesByTags && (
-                <Button
-                  variant="ghost"
-                  onClick={handleSwimlaneModeToggle}
-                  className="flex items-center gap-1 px-2"
-                >
-                  <svg 
-                    className={`w-3 h-3 transition-transform ${isSwimlaneModeExpanded ? 'rotate-180' : ''}`}
-                    fill="none" 
-                    stroke="currentColor" 
-                    viewBox="0 0 24 24"
-                  >
-                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
-                  </svg>
-                </Button>
-              )}
             </ControlGroup>
           )}
 
@@ -331,35 +310,6 @@ export function KanbanFilters({ filters, onFiltersChange, hiddenStatuses: propsH
         document.body
       )}
 
-      {/* Dropdown des modes swimlanes rendu via portail pour éviter les problèmes de z-index - masqué sur mobile */}
-      {!isMobile && isSwimlaneModeExpanded && typeof window !== 'undefined' && createPortal(
-        <div
-          ref={swimlaneModeDropdownRef}
-          className="fixed bg-[var(--card)] border border-[var(--border)] rounded-lg shadow-xl z-[9999] min-w-[140px]"
-          style={{
-            top: dropdownPosition.top,
-            left: dropdownPosition.left,
-          }}
-        >
-          <button
-            onClick={() => handleSwimlaneModeChange('tags')}
-            className={`w-full px-3 py-2 text-left text-xs hover:bg-[var(--card-hover)] transition-colors flex items-center gap-2 first:rounded-t-lg ${
-              (!filters.swimlanesMode || filters.swimlanesMode === 'tags') ? 'bg-[var(--card-hover)] text-[var(--primary)]' : 'text-[var(--muted-foreground)]'
-            }`}
-          >
-            🏷️ Par tags
-          </button>
-          <button
-            onClick={() => handleSwimlaneModeChange('priority')}
-            className={`w-full px-3 py-2 text-left text-xs hover:bg-[var(--card-hover)] transition-colors flex items-center gap-2 last:rounded-b-lg ${
-              filters.swimlanesMode === 'priority' ? 'bg-[var(--card-hover)] text-[var(--primary)]' : 'text-[var(--muted-foreground)]'
-            }`}
-          >
-            🎯 Par priorité
-          </button>
-        </div>,
-        document.body
-      )}
     </ControlPanel>
   );
 }