Every tool use now renders as a ClideCollapserCard over a one-item list
(a single tool is a list of one) — no separate single-card path. The
collapser carries the echoed last line, the count, and the aggregate
status (spinner while in-flight, check/cross once resolved); the inner
content card holds the call body + folded CALL/PROMPT/RESULT segments and
its own per-item mark. Inside a run (activity/edits/agent), tools render
as the bare inner content card so collapsers don't nest.
ConversationCard gains a `margin` param so inner cards carry no stream
margin; the collapser pads its inner canvas evenly on all sides (the
inner card no longer jams under the header). Rewrote the conversation_view
tests for the new structure and added a single-tool golden.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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