refactor: simplify KanbanGridLayout and update KanbanTaskCard accessibility

- Removed padding from the main div in KanbanGridLayout for a cleaner layout.
- Updated aria-label and button text in KanbanTaskCard to improve clarity and user experience when disapproving tasks.

src/renderer/components/team/kanban/KanbanGridLayout.tsx

@@ -116,7 +116,7 @@ const LoadingKanbanGridLayout = ({
       : buildDefaultItems(columns.length > 0 ? columns.map((column) => column.id) : ['todo']);
 
   return (
-    <div className="p-1.5">
+    <div>
       <div
         className="grid gap-3"
         style={{
@@ -178,7 +178,7 @@ const LoadedKanbanGridLayout = ({
   );
 
   return (
-    <div className="p-1.5">
+    <div>
       <WidthAwareGridLayout
         className="kanban-grid-layout"
         measureBeforeMount

src/renderer/components/team/kanban/KanbanTaskCard.tsx

@@ -470,13 +470,13 @@ export const KanbanTaskCard = ({
             <Button
               variant="outline"
               size="sm"
-              aria-label={`Move task ${task.id} back to done`}
+              aria-label={`Disapprove task ${task.id}`}
               onClick={(e) => {
                 e.stopPropagation();
                 onMoveBackToDone(task.id);
               }}
             >
-              Move back to DONE
+              Disapprove
             </Button>
           ) : null}
         </div>