Every rich detail section (system prompt, tool schema descriptions,
messages, tool results, compaction summaries, and the same cards inside
the /context modal) gains an icon-only copy control beside the Raw/MD
switch. It copies the section's exact SOURCE text, never the rendered
markdown, via the harness's own writeClipboard primitive; success flips
the glyph to a check for a beat, a rejected write claims no success, and
a repeat click inside the window is a no-op — the shipped code-block
control's behavior. Both icons and the writer are platform-module
exports present on all three supported baselines.
The added control tipped the head's trailing group out of the clipped
section card at the narrowest pane, so rich-text heads now fold that
group onto a second line under width pressure. The wrap is scoped to
those heads: the call-name head must stay one line (long MCP names
ellipsize instead).
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