# Issue #010: Device Emulation Completo

**Tipo**: Enhancement
**Prioridad**: Media
**Estado**: Pendiente

## Descripción

Implementar emulación completa de dispositivos móviles y tablets (viewport, user-agent, touch, geolocation).

## Funcionalidad deseada

- Emular dispositivos predefinidos (iPhone, iPad, Android, etc.)
- Viewport personalizado (width, height, deviceScaleFactor)
- User-Agent específico de dispositivo
- Touch events habilitados
- Orientación (portrait/landscape)
- Geolocation personalizada
- Timezone específica
- Locale/idioma
- Permisos de dispositivo

## API propuesta

```go
type DeviceDescriptor struct {
    Name              string
    UserAgent         string
    Viewport          Viewport
    DeviceScaleFactor float64
    IsMobile          bool
    HasTouch          bool
    DefaultOrientation string
}

type Viewport struct {
    Width  int
    Height int
}

type EmulationOptions struct {
    Device      *DeviceDescriptor
    Viewport    *Viewport
    UserAgent   string
    IsMobile    bool
    HasTouch    bool
    Orientation string // "portrait" | "landscape"
    Geolocation *Geolocation
    Timezone    string
    Locale      string
}

// Dispositivos predefinidos
var Devices = map[string]*DeviceDescriptor{
    "iPhone 13":      {...},
    "iPhone 13 Pro":  {...},
    "iPad Pro":       {...},
    "Pixel 5":        {...},
    "Galaxy S21":     {...},
}

func (b *Browser) Emulate(ctx context.Context, opts *EmulationOptions) error
func (b *Browser) EmulateDevice(ctx context.Context, deviceName string) error
func (b *Browser) SetViewport(ctx context.Context, width, height int) error
func (b *Browser) SetUserAgent(ctx context.Context, userAgent string) error
func (b *Browser) SetTouchEnabled(ctx context.Context, enabled bool) error
func (b *Browser) SetOrientation(ctx context.Context, orientation string) error
```

## Uso

```go
// Emular iPhone 13
b.EmulateDevice(ctx, "iPhone 13")

// Emulación personalizada
opts := &browser.EmulationOptions{
    Viewport: &browser.Viewport{Width: 375, Height: 812},
    UserAgent: "Mozilla/5.0 (iPhone...)",
    IsMobile: true,
    HasTouch: true,
    Orientation: "portrait",
}
b.Emulate(ctx, opts)
```

## CDP Methods

- `Emulation.setDeviceMetricsOverride`
- `Emulation.setUserAgentOverride`
- `Emulation.setTouchEmulationEnabled`
- `Emulation.setEmulatedMedia`
- `Emulation.setGeolocationOverride`
- `Emulation.setTimezoneOverride`
- `Emulation.setLocaleOverride`

## Referencias

- CDP Emulation: https://chromedevtools.github.io/devtools-protocol/tot/Emulation/
- Playwright devices: https://playwright.dev/docs/emulation
- Puppeteer emulation: https://pptr.dev/guides/emulation