Refactor components and implement generation state management

- Updated import order in App component for consistency.
- Enhanced Sidebar component with loading indicator for audio generation state.
- Integrated generation state management using Zustand in GenerationForm and Sidebar.
- Improved ProfileList component formatting for better readability.
- Added new generationStore for managing audio generation state across components.

app/src/App.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import voiceboxLogo from '@/assets/voicebox-logo.png';
 import { AudioPlayer } from '@/components/AudioPlayer/AudioPlayer';
 import { GenerationForm } from '@/components/Generation/GenerationForm';