1. Introduction
5. Getting Started
6. 1. Setup
   1. 1.1. Development Environment
   2. 1.2. Your First GPUI App
7. 2. GPUI Fundamentals
   1. 2.1. The Three Registers
   2. 2.2. Entities and Ownership
   3. 2.3. Contexts (App, Visual, Context)
   4. 2.4. Views and Rendering
   5. 2.5. Elements
11. Common Patterns
12. 3. State Management
    1. 3.1. Local vs Global State
    2. 3.2. Entity Updates and Notifications
    3. 3.3. Observing State Changes
    4. 3.4. Event Emission
    5. 3.5. Subscriptions
13. 4. UI Components
    1. 4.1. Reusable Components
    2. 4.2. Buttons
    3. 4.3. Text Inputs
    4. 4.4. Lists and Tables
    5. 4.5. Modals and Dialogs
    6. 4.6. Menus and Dropdowns
    7. 4.7. Tooltips
14. 5. Layout Patterns
    1. 5.1. Common Layouts
    2. 5.2. Flexbox Patterns
    3. 5.3. Grid Layouts
    4. 5.4. Split Panes
    5. 5.5. Tabs
    6. 5.6. Responsive Design
18. Styling
19. 6. Styling Basics
    1. 6.1. The Styled Trait
    2. 6.2. Colors and Backgrounds
    3. 6.3. Spacing and Sizing
    4. 6.4. Borders and Shadows
    5. 6.5. Text Styling
20. 7. Theming
    1. 7.1. Building a Theme System
    2. 7.2. Dark/Light Mode
    3. 7.3. Custom Color Palettes
21. 8. Animations
    1. 8.1. Basic Animations
    2. 8.2. Transitions
    3. 8.3. Animation Timing
25. Interactivity
26. 9. Mouse and Touch
    1. 9.1. Click Handlers
    2. 9.2. Hover States
    3. 9.3. Drag and Drop
    4. 9.4. Custom Interactions
27. 10. Keyboard Input
    1. 10.1. Actions System
    2. 10.2. Keymaps
    3. 10.3. Text Input Handling
28. 11. Focus Management
    1. 11.1. Focus Basics
    2. 11.2. Tab Navigation
    3. 11.3. Focus Visible
32. Advanced Topics
33. 12. Performance
    1. 12.1. Render Optimization
    2. 12.2. Efficient Lists
    3. 12.3. Profiling
34. 13. Async and Concurrency
    1. 13.1. Spawning Tasks
    2. 13.2. Background Work
    3. 13.3. Async Patterns
35. 14. Custom Elements
    1. 14.1. Implementing Element Trait
    2. 14.2. Custom Layout
    3. 14.3. Custom Painting
36. 15. Window Management
    1. 15.1. Multiple Windows
    2. 15.2. Window Options
    3. 15.3. Window Events
40. Integration
41. 16. File System
42. 17. Networking
43. 18. Data Persistence
44. 19. External Libraries
48. Cookbook
49. 20. Recipes
    1. 20.1. Building a Counter App
    2. 20.2. Todo List
    3. 20.3. Image Gallery
    4. 20.4. Settings Panel
    5. 20.5. Command Palette
53. Pitfalls and Best Practices
54. 21. Common Mistakes
    1. 21.1. Context Lifetime Issues
    2. 21.2. Subscription Management
    3. 21.3. Render Triggers
    4. 21.4. Entity Handle Leaks
55. 22. Best Practices
    1. 22.1. Code Organization
    2. 22.2. Testing GPUI Apps
    3. 22.3. Accessibility
59. Reference
60. 23. Glossary
61. 24. Trait Quick Reference
62. 25. Element Quick Reference
63. 26. Learning Resources