feat: cho phép người dùng và người quản lí xóa bình luận

frontend/src/components/ItineraryTimeline.tsx

@@ -80,6 +80,19 @@ export const ItineraryTimeline = ({
     useTourStore.setState({ legs: updatedLegs });
   };
 
+  const handleCommentDecrement = (locationId: string) => {
+    const currentLegs = useTourStore.getState().legs;
+    const updatedLegs = currentLegs.map(leg => ({
+      ...leg,
+      locations: leg.locations.map(loc => 
+        loc.id === locationId 
+          ? { ...loc, _count: { ...loc._count, comments: Math.max(0, (loc._count?.comments || 1) - 1) } }
+          : loc
+      )
+    }));
+    useTourStore.setState({ legs: updatedLegs });
+  };
+
   // State cho Modal sửa chặng
   const [isEditModalOpen, setIsEditModalOpen] = useState(false);
   const [editingLegData, setEditingLegData] = useState({ 
@@ -575,6 +588,7 @@ export const ItineraryTimeline = ({
         locationName={commentLocationName}
         isPublicView={isPublicView}
         onCommentAdded={() => handleCommentIncrement(commentLocationId)}
+        onCommentDeleted={() => handleCommentDecrement(commentLocationId)}
       />
     </div>
   );