Chat stream:
- Activity markers span the full conversation column (matching the
"Thought for Xs" row) instead of capping at 42rem.
- Own bubbles drop the redundant "You" header.
PR work panel: when the chat's agent posts a pull request, a module
docks top-right inside the chat area (conversation and composer shrink
to make room) showing the PR's source branch and the live PR card.
fetch_github_pull_request now returns head.ref for the branch chip.
Branch e2e repairs (both regressions pre-dated today):
- "Jump to latest" now re-asserts the bottom until row re-measurement
settles — a smooth jump aimed at a stale scrollHeight landed short
once grouped rows changed height estimates.
- Sidebar dnd gains a keyboard sensor with keyboard-aware collision
detection, and channel-assignment drop zones are disabled while a
section drag is active. The dnd e2e uses a viewport tall enough that
auto-scroll can't move the drop target mid-drag.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>