v5.1.0

New

• Live chat streaming UX: FastCommentsLiveChat matches the web live-chat widget - compact Twitch-style rows (small avatar + activity dot, bold name inlined with the message), day separators, no per-message dates/reply bar, a red "Live" dot, a composer divider, Ctrl/Cmd+Enter submit, and an in-place save shimmer (no spinner/flicker).
• Online users: a red presence dot, an always-on count, and OnlineUsersFacepile + OnlineUsersList widgets (Online/Offline sections via getOfflineUsers, fill sidebar mode). Presence is applied incrementally from websocket frames (add/remove + a debounced getUsersInfo enrich) instead of re-fetching the whole list.
• Feed parity with the Android SDK:
  • FastCommentsFeedPostCreate - a standalone post composer (Android FeedPostCreateView equivalent): author header, rich enriched-editor body, media + link attachments, tags (tagSupplier), custom toolbar buttons, cancel/loading/error. Drive it from the feed's store via onStoreReady, or pass a config.
  • Post rows gain author avatars, rich HTML content, a comment button opening the post's comments (urlId = "post:<id>", like Android), share, and a delete menu.
  • Typed image layouts (single full-width, multi-image carousel, link-only action buttons); config.hideFeedComposer.
• Store access: onStoreReady(store) on the chat/commenting/feed widgets + the exported FastCommentsStore type, so hosts can render store-driven widgets alongside.
• Every spinner replaced with a shimmer off one shared animation loop; anchored popovers (GIF/menus) flip above the trigger when there's no room below.

Fixed

• Reliable scroll-to-bottom on live-chat load (no clipped last message); the per-message reply/vote bar no longer wastes vertical space.
• Submit buttons (reply, SSO login, edit save) share one filled style with text-matching icons; the comment menu is a three-dot kebab in both modes.

Full changelog: see CHANGELOG.md.