Complete task 7: Set up React frontend project structure

- Vite project with React and TypeScript initialized
- TypeScript configured with strict mode enabled
- Tailwind CSS set up for styling
- Component and API directory structure created
- Environment variables configured (.env with VITE_API_BASE_URL)
- Build and dev server verified working

Requirements: 9.6, 12.3

.kiro/specs/text-to-audiobook/tasks.md

@@ -114,7 +114,7 @@
   - Test invalid voice ID returns error
   - _Requirements: 9.5_
 
-- [ ] 6. Create backend Dockerfile and docker-compose
+- [x] 6. Create backend Dockerfile and docker-compose
   - Write Dockerfile with Python base image
   - Install system dependencies (espeak-ng)
   - Install Python dependencies
@@ -129,7 +129,7 @@
   - Start container and verify health endpoint responds
   - _Requirements: 11.5_
 
-- [ ] 7. Set up React frontend project structure
+- [x] 7. Set up React frontend project structure
   - Initialize Vite project with React and TypeScript
   - Configure TypeScript with strict mode
   - Set up Tailwind CSS for styling
@@ -298,3 +298,4 @@
   - Test Docker deployment
   - Fix any bugs discovered during testing
   - _Requirements: All_
+,.