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/stores/generationStore.ts

@@ -0,0 +1,11 @@
+import { create } from 'zustand';
+
+interface GenerationState {
+  isGenerating: boolean;
+  setIsGenerating: (generating: boolean) => void;
+}
+
+export const useGenerationStore = create<GenerationState>((set) => ({
+  isGenerating: false,
+  setIsGenerating: (generating) => set({ isGenerating: generating }),
+}));