Create UmbralToast

[javikin]

Issue: Create UmbralToast

Overview

Create a toast component for subtle, informational messages that are more compact than snackbars and auto-dismiss quickly.

PRD Reference

Section B2.2: UmbralToast (mas sutil que Snackbar)

Acceptance Criteria

• Implement API signature:
  • message: String
  • icon: ImageVector?
• Apply visual specifications:
  • More compact than Snackbar
  • No action button (informational only)
  • Appears at top-center of screen
  • Auto-dismiss after 2 seconds
  • Background with blur effect (if performance allows)
• Implement visual styling:
  • Background: backgroundElevated with 90% opacity
  • Corner Radius: pill shape (full rounded)
  • Padding: 12.dp horizontal, 8.dp vertical
  • Height: auto, approximately 36-40.dp
  • Text: labelMedium
• Implement animations:
  • Enter: fadeIn + scaleIn from 0.8
  • Exit: fadeOut + scaleOut to 0.8
  • Duration: 200ms each
• Create ToastHost composable for managing toasts
• Create preview composables
• Add KDoc documentation

Visual Reference

Centered at top:

        ┌─────────────────────┐
        │  ✓  Copiado         │
        └─────────────────────┘

With just text:

        ┌─────────────────────┐
        │  Guardando...       │
        └─────────────────────┘

Use Cases

• Copy confirmation
• Quick status updates
• Non-critical information
• Action acknowledgments

Implementation Notes

• Toast should float above content
• Use Popup or Box with align(Alignment.TopCenter)
• Blur effect using Modifier.blur() if API level supports
• Fallback to semi-transparent background if blur not available
• Consider using coroutines for timing

File Location

app/src/main/java/com/umbral/presentation/ui/components/feedback/UmbralToast.kt

Dependencies

• Motion.kt (01-motion-tokens)
• Phase 1 color tokens

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Part of Epic #80