#92 UI: Toast Notification Component

Create reusable toast notification system. Component: api/ui/templates/components/toast_notification/ Files: - toast_notification.html - toast_notification.css - toast_notification.js Features: - Toast Types: - Success (green) - Error (red) - Warning (yellow) - Info (blue) - Positioning: - Top-right (default) - Top-center - Bottom-right - Features: - Auto-dismiss with configurable duration - Progress bar showing time remaining - Manual dismiss button - Stack multiple toasts - Max 5 visible at once - Click to dismiss - Animation: - Slide in from right - Fade out on dismiss - Smooth stacking JavaScript API: - toast.success(message, options) - toast.error(message, options) - toast.warning(message, options) - toast.info(message, options) - toast.clear() - dismiss all Options: - duration: ms (default 5000) - persistent: boolean - action: { text, callback } With ultra attention to details and correctness. Before closing: write comment summarizing implementation with screenshot.