Use `typography` and `getTypographyFromKey` from the design-system

Editor assessment

Switching imports to a shared design-system package is arguably a refactor rather than chore, since it changes internal structure without new behavior; either way the impact is internal and no version drama ensues. The subject is specific — naming `typography` and `getTypographyFromKey` gives readers exact symbols — though backticks in a commit header are unusual and can trip some tooling. The body adds almost nothing: 'Change typography imports, change function call' merely restates the header in worse form. One line on motivation would have redeemed it.