Why: Tool calls stayed invisible while arguments streamed, and a failed run hid the only reply inside the collapsed process block.
Evidence: make test in the worktree passed: boundaries, core, backend, frontend vitest 66, ui vitest 79, agent-command. Mock browser check showed the Chinese process summary, the reply outside the fold, a humanized error with 继续执行, and the back-to-bottom button.
Impact: Dev gitlinks move to the feature commits for core, agent-native, backend, ui, and frontend. DESIGN.md §9.6 describes individual tool blocks for exec, write, and delegate.
Refs: feature/stream-display-overhaul
Co-authored-by: Cursor <cursoragent@cursor.com>
weichenandCursor
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