First line: a CSS-only hover tooltip that wraps a trigger element.

```jsx
<Tooltip label="Поиск  ⌘K" side="right">
  <IconButton icon="Search" />
</Tooltip>
```

Notes
- Reveals on hover via CSS; no portal — keep it inside a positioned container (the collapsed sidebar uses `side="right"`).
- Keep labels to a few words; for rich content use a popover/menu instead.