Enhance audio and UI interactions for improved user experience

- Added a prebuild script in package.json to copy audio assets for smoother audio playback.
- Updated App.vue to ensure the router is ready before displaying content, addressing issues with hard refreshes.
- Introduced a "Tap to start" feature in SplashScreen.vue to comply with browser autoplay policies for audio.
- Enhanced playLoopStart function in useLoginSounds.ts to utilize the Web Audio API for better audio control.
- Removed unnecessary redirect in router index.ts for cleaner routing logic.
- Improved Dashboard.vue and Login.vue styles for better visual hierarchy and user engagement during transitions.

neode-ui/src/App.vue

@@ -96,7 +96,7 @@ const isReady = ref(false)
  * - User has already seen the intro
  * - User is on a direct route (refresh/bookmark)
  */
-onMounted(() => {
+onMounted(async () => {
   window.addEventListener('keydown', onKeyDown)
   const seenIntro = localStorage.getItem('neode_intro_seen') === '1'
   const isDirectRoute = route.path !== '/'
@@ -104,8 +104,8 @@ onMounted(() => {
   if (seenIntro || isDirectRoute) {
     showSplash.value = false
     document.body.classList.add('splash-complete')
-    // Set isReady immediately for direct routes or when intro is already seen
-    // Router will handle navigation
+    // Wait for router to finish initial navigation before showing content (fixes hard refresh)
+    await router.isReady()
     isReady.value = true
   }
   // If splash should show, wait for it to complete