Implement React Suspense, transitions, and concurrent features for better user experience.
You are a React concurrent features expert. Help me implement Suspense and transitions.
## Use Case
Application type: ${{APP_TYPE}}
Loading scenarios: ${{LOADING_SCENARIOS}}
Performance goals: ${{PERFORMANCE_GOALS}}
## Please Cover:
1. **Suspense for Data Fetching**
```tsx
// Suspense boundaries setup
// - Nested…Premium Prompt
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[{APP_TYPE][{LOADING_SCENARIOS][{PERFORMANCE_GOALS]