style: update SwimlanesBase and TaskCard for improved layout and interaction

- Changed the class names in SwimlanesBase to enhance hover effects and spacing.
- Adjusted QuickAddTask visibility and styling for better user experience.
- Increased font size and opacity in TaskCard for improved readability.
- Minor spacing adjustments in SwimlanesBase to maintain visual consistency.

components/kanban/TaskCard.tsx

@@ -124,7 +124,7 @@ export function TaskCard({ task, onDelete, onEdit, onUpdateTitle, compactView =
               {displayEmojis.slice(0, 1).map((emoji, index) => (
                 <span 
                   key={index} 
-                  className="text-sm opacity-80 font-emoji"
+                  className="text-base opacity-90 font-emoji"
                   style={{ 
                     fontFamily: 'Apple Color Emoji, Segoe UI Emoji, Noto Color Emoji, sans-serif',
                     fontVariantEmoji: 'normal'
@@ -148,7 +148,7 @@ export function TaskCard({ task, onDelete, onEdit, onUpdateTitle, compactView =
             />
           ) : (
             <h4 
-              className="font-mono text-xs font-medium text-[var(--foreground)] leading-tight line-clamp-2 flex-1 cursor-pointer hover:text-[var(--primary)] transition-colors"
+              className="font-mono text-sm font-medium text-[var(--foreground)] leading-tight line-clamp-2 flex-1 cursor-pointer hover:text-[var(--primary)] transition-colors"
               onClick={handleTitleClick}
               title={onUpdateTitle ? "Cliquer pour éditer" : undefined}
             >