Built-in rows are a plain span and a badge rather than `h3`/`p` or disabled
controls, so the block's own dimming never reached them: on web they were the
only full-contrast content inside "only available in the desktop app".

Also switches `browserProfile` to the subpath namespace import the rest of
`packages/contracts` uses.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>