fix(LeftMenuLayout): correct background image path in style

src/components/layout/LeftMenuLayout.vue

@@ -328,7 +328,7 @@ onMounted(() => {
 }
 
 .q-drawer-container {
-  background-image: url("images/background-opacity.png");
+  background-image: url("/images/background-opacity.png");
   background-position: 15%;
 }
 </style>