Each user and assistant message gets a copy button (⧉ → ✓) that puts the whole
message on the clipboard. Assistant copies the raw markdown (its dataset.raw);
user copies its text.
- copyToClipboard uses the async Clipboard API when available and falls back to a
hidden-textarea + execCommand with an explicit iOS selection range, so it works
on the iPhone PWA over plain-HTTP LAN (no secure context).
- Copy sits in the assistant rate-bar and in a right-aligned bar on user bubbles;
tools stay visible on touch (@media hover:none) since there's no hover on iOS.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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