feat: tính năng chia sẻ khẩn cấp

frontend/src/components/ItineraryTimeline.tsx

@@ -201,7 +201,7 @@ export const ItineraryTimeline = ({
   }, [legs]);
 
   return (
-    <div className="max-w-2xl mx-auto p-0 bg-gray-50 min-h-screen">
+    <div id="itinerary-timeline-print-zone" className="max-w-2xl mx-auto p-0 bg-gray-50 min-h-screen">
       <div className="px-2 pt-4">
         {legs.length === 0 ? (
           <div className="text-center py-20 bg-white rounded-3xl border-2 border-dashed border-gray-200">
@@ -397,7 +397,10 @@ export const ItineraryTimeline = ({
                                   {isEndPoint && (
                                     <span className="inline-block px-2 py-0.5 bg-red-100 text-red-700 text-[10px] font-bold rounded-md mb-1 uppercase tracking-wider">Điểm kết thúc</span>
                                   )}
-                                  <h3 className={`font-semibold text-lg ${location.status === 'COMPLETED' ? 'text-gray-500 line-through' : 'text-gray-800'}`}>
+                                  <h3 
+                                    onClick={() => onNavigate?.(location)}
+                                    className={`font-semibold text-lg cursor-pointer hover:text-blue-600 transition-colors select-none ${location.status === 'COMPLETED' ? 'text-gray-500 line-through' : 'text-gray-800'}`}
+                                  >
                                     {location.name}
                                   </h3>
                                   <div className="flex items-center text-sm text-gray-500 mt-1">