fix(ui): iOS bubble width hugging + scroll auto-follow/jump-to-latest - #10
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Bubble width: point SwiftStreamingMarkdown at our fork's fix-paragraph-hugging-width branch (upstream issue #157, PR #158, not merged yet) instead of main - fixes AssistantBubbleView/ HumanAgentBubbleView always filling to the 80% width cap regardless of reply length. Scroll: rewrite MessageListView with the "flip trick" (SwiftUI's answer to Android's LazyColumn(reverseLayout = true), since ScrollView has no native reverse-layout flag) - render messages newest-first and flip the whole scroll view plus a counter-flip per row. This makes "stay at the anchor" (offset 0) the natural resting position instead of a moving target that has to be actively chased, which is what kept causing the jump-to-latest button to flash and auto-follow to stall mid-stream (most recently: correct bubble hugging made width - not just height - change during streaming, reflowing line breaks non-monotonically and confusing the old height-based tracking). Also replaces the iOS 16/17 GeometryReader-based button-visibility tracking, which broke under the flip (measuring through a coordinate space named after the .scaleEffect transform), with onScrollGeometryChange's real contentOffset on iOS 18+.
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Summary
ui-ios's SwiftStreamingMarkdown dependency at our fork'sfix-paragraph-hugging-widthbranch (filed upstream as microsoft/SwiftStreamingMarkdown#157, fix in #158, not merged yet) - fixes AI/agent chat bubbles always filling to the 80% width cap instead of hugging short replies.MessageListView's scroll handling using the SwiftUI "flip trick" (the equivalent of Android'sLazyColumn(reverseLayout = true)) - fixes the jump-to-latest button flashing and auto-follow stalling mid-stream, which kept recurring across several fix attempts once bubble width became genuinely content-driven.Test plan
Package.swiftback to upstreammainonce Fix paragraph/heading blocks always reporting full offered width microsoft/SwiftStreamingMarkdown#158 merges🤖 Generated with Claude Code