Fix tall chat transcript scrolling #140MergedMaggieAppletonmerged 3 commits intomainfromrefs/pull/140/headConversationFiles changed3 files changed+88-2StackedSplitapps/web/src/chat/transcript.tsx+5 −2docs/superpowers/specs/2026-08-28-chat-composer-spacing-design.md+20 −0e2e/smoke.e2e.ts+63 −0