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/views/LoginPage.vue

@@ -14,23 +14,7 @@
           <span v-for="i in 12" :key="i" class="w-2 h-2 bg-black/40 rounded-full"></span>
         </div>
         <div class="flex flex-col items-center justify-center h-full">
-          <div class="relative">
-            <div class="w-48 h-48 flex items-center justify-center">
-              <svg viewBox="0 0 120 120" class="w-full h-full">
-                <polygon points="40,35 80,35 90,50 50,50" fill="#ff6b35"/>
-                <polygon points="40,35 50,50 50,90 40,75" fill="#e85a2a"/>
-                <polygon points="50,50 90,50 90,90 50,90" fill="#ff8c5a"/>
-                <polygon points="40,75 50,90 50,70 40,55" fill="#1a1a1a"/>
-                <polygon points="70,50 90,50 90,70 70,70" fill="#1a1a1a"/>
-                <polygon points="50,70 70,70 70,90 50,90" fill="#1a1a1a"/>
-                <rect x="95" y="35" width="5" height="5" fill="#ff6b35"/>
-                <rect x="100" y="30" width="4" height="4" fill="#ff6b35"/>
-                <rect x="105" y="38" width="3" height="3" fill="#ff6b35"/>
-                <rect x="98" y="45" width="4" height="4" fill="#ff6b35"/>
-              </svg>
-            </div>
-          </div>
-          <h1 class="text-4xl font-mono font-bold text-noctune-dark tracking-wider mt-4">noctune</h1>
+          <img src="/logo_transparent.png" alt="Noctune" class="w-48 h-48 object-contain" loading="lazy" />
         </div>
       </div>