feat: Implement and refine a Toast notification system, and replace the copy pack toast with an animated button.

docs/development/devlog/2025-12-17-023000_enhanced_toast_visibility.md

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+### Enhanced Toast Visibility
+
+**Status**: Completed
+**Date**: 2025-12-17
+
+**Description**
+Updated the Toast notification to be more prominent and centrally located, as per user feedback.
+
+**Changes**
+1.  **Position**: Moved from bottom-right to top-center (`top-6 left-1/2 -translate-x-1/2`).
+2.  **Animation**: Changed to `slide-in-from-top-full` with a slight zoom-in effect.
+3.  **Styling**:
+    -   Increased padding (`px-6 py-4`).
+    -   Increased border width (`border-2`) and brightness.
+    -   Added stronger shadows (`shadow-2xl`).
+    -   Increased contrast for text and background.
+    -   Increased font weight to `bold`.
+
+**Effect**
+Notifications are now impossible to miss, appearing top-center with a premium, game-like alert style.