feat: add mobile navigation component and queue panel

- Implemented MobileNav.vue for mobile navigation with links to Home, Library, Playlist, and Profile.
- Added QueuePanel.vue to display the current queue of tracks with functionality to jump to a specific track.
- Created ArtistView.vue to show artist details and their tracks, including loading states and play functionality.
- Introduced NotFoundPage.vue for handling 404 errors with a user-friendly message and a link to return home.

src/router/index.js

@@ -9,6 +9,8 @@ import PlaylistPage from '../views/PlaylistPage.vue'
 import PlaylistDetail from '../views/PlaylistDetail.vue'
 import ProfilePage from '../views/ProfilePage.vue'
 import AdminPage from '../views/AdminPage.vue'
+import ArtistView from '../views/ArtistView.vue'
+import NotFoundPage from '../views/NotFoundPage.vue'
 
 const routes = [
   { path: '/', redirect: '/home' },
@@ -19,7 +21,9 @@ const routes = [
   { path: '/playlist', name: 'Playlist', component: PlaylistPage },
   { path: '/playlist/:id', name: 'PlaylistDetail', component: PlaylistDetail },
   { path: '/profile', name: 'Profile', component: ProfilePage },
+  { path: '/artist/:name', name: 'Artist', component: ArtistView },
   { path: '/admin/tracks', name: 'AdminTracks', component: AdminPage, meta: { admin: true } },
+  { path: '/:pathMatch(.*)*', name: 'NotFound', component: NotFoundPage },
 ]
 
 const router = createRouter({
@@ -41,4 +45,8 @@ router.beforeEach((to, from, next) => {
   next()
 })
 
+router.afterEach(() => {
+  window.scrollTo(0, 0)
+})
+
 export default router