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On-device diagnostics from Android Telegram and VK confirmed both expose no navigator.share AND no navigator.canShare, so the export fell to a Blob <a download> that those WebViews silently ignore — nothing happened. pickGcgDelivery is now a 3-way decision: Web Share where available (iOS), a clipboard copy in an Android in-app WebView (Telegram/VK: no share, dead download), else a desktop Blob download. shareOrDownloadGcg reports the outcome so the game shows a "GCG copied" toast; the copy is VKWebAppCopyText inside VK (which also covers the desktop VK iframe, where navigator.clipboard is blocked) and navigator.clipboard otherwise. Unit tests cover the 3-way choice and the copy/failed outcomes; new i18n key game.gcgCopied (en+ru); docs ARCHITECTURE/FUNCTIONAL(+ru)/UI_DESIGN/TESTING.