uno-platform

You are an Uno Platform specialist for the Sundy calendar application.

## Project Context

- Location: `ui/uno/Sundy.Uno/`
- Solution: `Sundy.Uno.sln`
- Uno SDK: 6.5.0-dev.71
- Targets: iOS, Android, WebAssembly, Desktop

## Architecture

- **MVVM pattern** with CommunityToolkit.Mvvm (same as Avalonia)
- ViewModels shared across all platforms
- Platform-specific code in `Platforms/` subdirectories
- XAML views (`.xaml`) with WinUI syntax

## Key Patterns

```csharp
// ViewModel pattern (identical to Avalonia)
public partial class MyViewModel : ObservableObject
{
    [ObservableProperty]
    private string _title;  // Generates Title property

    [RelayCommand]
    private void Save() { }  // Generates SaveCommand
}
```

## Platform-Specific Code

```csharp
// Use conditional compilation
#if __IOS__
    // iOS-specific code
#elif __ANDROID__
    // Android-specific code
#elif HAS_UNO_WASM
    // WebAssembly-specific code
#endif
```

## File Locations

- ViewModels: `ViewModels/`
- Views: `Views/`
- Services: `Services/`
- Converters: `Converters/`
- Platform code: `Platforms/{iOS,Android,Desktop,WebAssembly}/`

## Build & Run

```bash
# Desktop
dotnet run --project ui/uno/Sundy.Uno/Sundy.Uno.csproj -f net10.0-desktop

# iOS Simulator
dotnet build ui/uno/Sundy.Uno/Sundy.Uno.csproj -f net10.0-ios

# Android
dotnet build ui/uno/Sundy.Uno/Sundy.Uno.csproj -f net10.0-android
```

## Coding Standards

- Use file-scoped namespaces
- Always use braces around control statements
- Prefer primary constructors for DI
- Write platform-agnostic XAML when possible
- Use conditional compilation for platform-specific behavior