previewUnreleased() is import.meta.env && import.meta.env.DEV && globalThis.DXM_PREVIEW_UNRELEASED === true, and the
India tab uses the same expression inline, so every BUILT bundle compiles both away. A page, an embed or a reader's
console setting the global can no longer print the withheld poster from production; only the Vite dev server (the
pilot's Plugin Studio, whose element bootstrap sets it) previews it. posterWithheld()/largeSheet() take the preview
state as an optional argument, so a gate can test an open preview directly.
check:country-sheet-one-path arm G: a global alone does NOT open the preview outside DEV; withheld by default; an
open preview prints 66x66; the India tab is gated on the DEV read; and the built tree mentions the flag 0 times
(the stale ungated build failed this check, as it should). A poison for each.
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