On phones (up to 767px) the "What can this map do?" panel opened as a full-screen page: a few
lines of text at the top of an empty white screen, reading as a new page rather than a panel.
It is now a bottom sheet:
- it sizes to its content, up to 70% of the small viewport (svh, so a collapsing URL bar does not
resize it), and scrolls inside, with its scroll kept to itself;
- the close button is 44px and stays in view in the sheet's header;
- the dimmed map above it stays visible, and a tap there closes the panel, as Escape does.
Desktop is unchanged. Rebuilt doxa-maps-spa (the only bundle that compiles MapInfo.vue), then
tree + SRI.
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