Vue Router Advanced Patterns

I need help with advanced Vue Router patterns.

**Application Structure:**
- Number of routes: [X]
- Nested routes needed: [describe hierarchy]
- Protected routes: [list them]

**Current Router Setup:**
```javascript
[paste current router configuration]
```

**Advanced Features Needed:**
- Navigation guards: [global/per-route/in-component]
- Route meta fields: [what data]
- Scroll behavior: [requirements]
- Transitions: [yes/no]

**Authentication:**
- Auth system: [describe]
- Role-based access: [yes/no]

Please provide:
1. Optimized router configuration
2. Navigation guard implementations
3. Nested route patterns
4. Lazy loading with suspense
5. Route meta handling
6. Scroll behavior configuration
7. Transition animations between routes