Why: main advanced with PR #15/#16 (part-order preservation, artifact
downloads, cross-session UI); task-sync requires the branch to carry it.
Evidence: resolution keeps the arrival-ordered items stream from this
branch (tool-driven process marking, pure/testable logic in live.ts) and
adopts main's rendering and ids: groupParts in-place process blocks,
real tool callIds on live tool parts, messageparts utilities, and the
restored phase-driven showProcessInline predicate alongside the CF0
long-reply excerpt that main's rewrite had dropped. vitest 32/32
(includes main's messageparts suite and this branch's 12 live cases);
tsc -b clean.
Impact: single coherent live pipeline - items accumulate in event order,
liveToMessage projects Parts with tool-driven process marks, rendering
folds consecutive process blocks in place; responding still collapses
the process area (Cursor-style) as originally reviewed.
Refs: feature/chat-process-split-r1
weichen
765789f34d