Enhance audio and visual elements in the UI for improved user experience

- Added a new script in package.json to generate welcome speech audio for enhanced onboarding.
- Updated SplashScreen.vue and OnboardingWrapper.vue to use the new intro background image and poster.
- Modified Dashboard.vue and Login.vue to reflect changes in background images for consistency.
- Removed outdated background images and updated references to ensure a cohesive visual theme.
- Improved tap-to-start feature with new text and logo in SplashScreen.vue for better engagement.
- Enhanced audio playback functionality in useLoginSounds.ts to include welcome speech.

neode-ui/package.json

@@ -16,7 +16,8 @@
     "build:production": "NODE_ENV=production vue-tsc -b && vite build --mode production",
     "preview": "vite preview",
     "type-check": "vue-tsc --noEmit",
-    "prebuild": "cp ../../loop-start.mp3 public/assets/audio/ 2>/dev/null || true"
+    "prebuild": "cp ../../loop-start.mp3 public/assets/audio/ 2>/dev/null || true",
+    "generate-welcome-speech": "node scripts/generate-welcome-speech.js"
   },
   "dependencies": {
     "dockerode": "^4.0.9",