apply the page shell to the admin texts page and present each
existing text as a card-link plus the new-text form as a card with
a primary submit button. ids (#texts-list, #newTextName, #submit,
#back) and the name attribute on the input are preserved so the
existing cypress flows continue to work.
add a stylesheet link and the standard responsive viewport meta tag
to every page template. purely additive - no markup or selector
changes - so existing cypress assertions and page js id hooks remain
intact. with this commit every page picks up the base styling from
app.css.
