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Server-sent rich messages can arrive partial (RichMessage isPartial -> instantPage.isComplete == false). The bubble renders the partial page with an inline "Show more" link; tapping it fetches the full page once and expands in place. - RichTextMessageAttribute keeps the partial instantPage and gains an optional fullInstantPage, filled by engine.messages.requestFullRichText via transaction.updateMessage. The seed-config merge preserves a fetched fullInstantPage across later server updates. - ChatMessageRichDataBubbleContentNode: node-local, per-message expand state (collapsed on every fresh display, even when fullInstantPage is already cached); renders (expanded ? fullInstantPage : nil) ?? instantPage; gates the link on !expanded && !isComplete (+ not streaming, Cloud-only, not preview/messageOptions); expand state threaded through both layout caches; shimmer while fetching (instant when cached); bubble grows downward on expand via setInvertOffsetDirection. - New localized string Chat.RichText.ShowMore; docs in docs/instantpage-richtext.md. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
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