globalThis.DXM_PREVIEW_UNRELEASED lets a page show what is withheld from the public (the whole-India country
poster). defineMapElement.js, every element's first module, now sets it behind import.meta.env.DEV: true only
under the Vite dev server (the pilot's hot-reload preview), a compile-time false in every build, so the build
drops the line. The built tree, which goes to the research landing and DX Life's /dx-maps, never carries it.
check:preview-flag-dev-only (gates:pre; self-test in gates:post): no file under public/ assigns the flag in any
spelling a minifier writes, and every source assignment is behind import.meta.env.DEV (2 planted defects).
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