refactor(gui): hide sidebar shadow in navbar part

Signed-off-by: Pranav C <pranavxc@gmail.com>

packages/nc-gui/pages/[projectType]/[projectId]/index.vue

@@ -254,7 +254,7 @@ useEventListener(document, 'keydown', async (e: KeyboardEvent) => {
         <div
           style="height: var(--header-height); border-bottom-width: 1px"
           :class="isOpen ? 'pl-4' : ''"
-          class="flex items-center !bg-white-500  text-primary px-1 gap-1 border-gray-200"
+          class="flex items-center !bg-white-500 text-primary px-1 gap-1 border-gray-200 nc-sidebar-header"
         >
           <div
             v-if="isOpen && !isSharedBase"
@@ -604,4 +604,11 @@ useEventListener(document, 'keydown', async (e: KeyboardEvent) => {
 :deep(.ant-dropdown-menu-submenu-title) {
   @apply py-0;
 }
+
+.nc-sidebar-header{
+  @apply relative;
+  &::after{
+    @apply absolute content-[''] -right-1 top-0 w-1 h-full bg-white;
+  }
+}
 </style>