Weights the label so the band reads as a labelled fact rather than one
run of prose — the eye lands on what the line is about before reading
which store it names.
Rendered as a `span` inside the existing `Text` rather than as a sibling
in the `Group`: `Text` renders a `<p>`, so a nested one would be a `<p>`
inside a `<p>` (invalid, and the browser closes the outer paragraph
early), and a sibling would take the Group's `gap` and sit too far from
the value it labels. `inherit` keeps it at the label's own size.
Splitting the text is why the assertions move off `getByText`: it matches
a string against an element's *direct* text nodes, so "Secrets: OS
keychain" now reads as two fragments even though it renders as one line.
The unit tests, both modal tests, and the four stories assert
`toHaveTextContent` on the band instead, which reads the full subtree.
Verified in the running dev server: prefix 700, store name 500, both at
the same 12px.
Signed-off-by: cliffhall <cliff@futurescale.com>
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