Cherry-picks for release/v0.6.3 (round 2)#24412

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noanflaherty wants to merge 10 commits into

release/v0.6.3from

cherry-pick/release/v0.6.3

Commits on Apr 8, 2026

Update activation hint for app builder (#24372)
noanflaherty
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Remove 500-word threshold from document-writer skill (#24388)

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perf: replace .move(edge: .bottom) transitions with .opacity in LazyVStack to fix motionVectors hang (LUM-795) (#24375)

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perf: move frame(maxWidth:) from LazyVStack content to ScrollView to fix 134s hang (LUM-740) (#24321)

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[LUM-718] perf: flatten inner view hierarchies (MarkdownSegmentView, AssistantProgressView) (#23982)

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fix(macOS): replace @State caches with NSCache and remove nested ScrollViews in StepDetailRow (#24336)

siddseethepalli
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fix(macOS): defer lifecycle bottom-pin writes to avoid SwiftUI update-cycle mutation (#24332)

siddseethepalli
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noanflaherty
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fix(macOS): coalesce composer menu refreshes and remove withAnimation wrappers (#24337)

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noanflaherty
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[LUM-498] Fix inferCategory main-thread hang by caching results and offloading computation (#24274)

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chore: regenerate skills/catalog.json to sync document-writer includes (#24402)

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