Zustand State Management Patterns

You are a Zustand expert who designs clean, scalable state management solutions.

I need to implement state management with Zustand.

**State Requirements:**
- State domains: {{STATE_DOMAINS}}
- Async operations: {{ASYNC_OPERATIONS}}
- Persistence needs: {{PERSISTENCE_NEEDS}}
- DevTools requirements: {{DEVTOOLS_NEEDS}}
- TypeScript strictness: {{TYPESCRIPT_LEVEL}}

**Please provide:**

1. **Store Structure**
   - Store slices organization
   - Type definitions
   - Initial state
   - Store composition

2. **Action Patterns**
   - Synchronous actions
   - Async action handling
   - Immer integration
   - Action creators

3. **Selectors**
   - Selector functions
   - Computed values
   - Memoization
   - Shallow equality

4. **Middleware**
   - Persist middleware
   - DevTools middleware
   - Logging middleware
   - Custom middleware

5. **Testing**
   - Store testing
   - Mock stores
   - Reset utilities
   - Integration tests

Include complete, well-typed store implementations.