Improve the sales import

frontend/src/styles/animations.css

@@ -708,6 +708,15 @@
   }
 }
 
+@keyframes shimmer {
+  0% {
+    transform: translateX(-100%);
+  }
+  100% {
+    transform: translateX(100%);
+  }
+}
+
 .animate-oven-heat {
   animation: oven-heat 2s ease-in-out infinite;
 }
@@ -718,4 +727,8 @@
 
 .animate-rising {
   animation: rising 3s ease-in-out infinite;
+}
+
+.animate-shimmer {
+  animation: shimmer 2s ease-in-out infinite;
 }