Paint Projects is a comprehensive paint calculator app that helps users estimate paint requirements for interior and exterior painting projects. The app allows users to create multiple paint jobs, add different types of surfaces (walls, doors, windows), and calculate the exact amount of paint needed based on coverage rates and number of coats.

Multi-Job Management
- Create and manage multiple paint projects
- Switch between different jobs easily
- Rename and delete jobs as needed
- Persistent storage of all job data

Surface Calculation
- Add walls, doors, and windows with custom dimensions
- Automatic area calculations for each surface type
- Subtract door and window areas from wall areas for accurate paint requirements
- Name surfaces for better organization

Paint Settings
- Configurable paint coverage per unit (L or gallons)
- Adjustable number of coats required
- Support for both metric (m²/L) and imperial (ft²/gal) units
- Real-time calculation updates