- Add /memory CLI built-in slash command
- Refactor MemoryBrowserPanel to accept isOpen/onClose props
- Add Send /memory and Refresh buttons to MemoryBrowserPanel header
- Add Memory Manager entry to NavMenu
- Create unified ToastContainer replacing AchievementNotification and
UpdateNotification with a single stacked toast system
- Add toasts store with info (4s), achievement (5s), and persistent
update toast types
- Move getAchievementRarity and getRarityColour helpers to toasts store
- Detect auto-memory writes in tauri.ts output listener and fire toast
- Remove action buttons from update toast; version is now a direct link
Closes#212
