Vue Pinia Store Setup

I need help setting up Pinia stores for my Vue 3 application.

**Application State Needs:**
[Describe your state requirements]

**Store Structure:**
```
[describe planned stores]
```

**Features Needed:**
- Async actions: [yes/no]
- Store composition: [yes/no]
- Persistence: [yes/no]
- SSR support: [yes/no]

**TypeScript:** [yes/no]

**Current Setup:**
```javascript
[paste any existing store code]
```

Please provide:
1. Store definitions with proper typing
2. Actions and getters
3. Store composition patterns
4. Plugin setup (persistence, etc.)
5. Component integration examples
6. Testing approach
7. DevTools configuration