- Added transcriptMessageComponents to every InteractiveMode ctx test literal; #6033's reuse cache made the field required and addMessageToChat populates it unconditionally.
- Wired setTodoPhases into the eager-todo ToolSession fixture to mirror sdk.ts; the test relied on the stale message_end todo replay #6148 removed.
- Split mixed assistant text into per-tool segments instead of one post-tool tail.
- Insert each segment immediately after its preceding tool component across live and rebuilt transcripts.
- Extended the regression test to cover two tool calls with middle and final assistant text.
Fixes#4871
- Split mixed assistant messages so pre-tool text stays before tool panels while trailing text renders after the tool timeline.
- Applied the split to live streaming, transcript rebuilds, and file-backed transcript rendering.
- Added a focused EventController regression test for text/toolCall/text Cursor-shaped turns.
Fixes#4871
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