refactor: make user reactive using computed and simplify prop passing

- Switched `user` from a static variable to a computed property to enable reactivity.
  This ensures updated user data (e.g. after profile update) is reflected in the NavBar
  without requiring a full page refresh.
- Updated prop binding syntax from `:user="user"` to shorthand `:user`.

Author: chabdulrahmn

resources/js/components/NavUser.vue

@@ -5,10 +5,11 @@ import { SidebarMenu, SidebarMenuButton, SidebarMenuItem, useSidebar } from '@/c
 import { type User } from '@/types';
 import { usePage } from '@inertiajs/vue3';
 import { ChevronsUpDown } from 'lucide-vue-next';
+import { computed } from 'vue';
 import UserMenuContent from './UserMenuContent.vue';
 
 const page = usePage();
-const user = page.props.auth.user as User;
+const user = computed(() => page.props.auth.user as User);
 const { isMobile, state } = useSidebar();
 </script>
 
@@ -18,7 +19,7 @@ const { isMobile, state } = useSidebar();
             <DropdownMenu>
                 <DropdownMenuTrigger as-child>
                     <SidebarMenuButton size="lg" class="data-[state=open]:bg-sidebar-accent data-[state=open]:text-sidebar-accent-foreground">
-                        <UserInfo :user="user" />
+                        <UserInfo :user />
                         <ChevronsUpDown class="ml-auto size-4" />
                     </SidebarMenuButton>
                 </DropdownMenuTrigger>
@@ -28,7 +29,7 @@ const { isMobile, state } = useSidebar();
                     align="end"
                     :side-offset="4"
                 >
-                    <UserMenuContent :user="user" />
+                    <UserMenuContent :user />
                 </DropdownMenuContent>
             </DropdownMenu>
         </SidebarMenuItem>