Clicking a link in the message shows "Open the link: <URL> | Edit | Delete"
just below it. Open opens http(s)/mailto links in a new tab (a pasted
javascript: link is shown but never run); Edit swaps in an inline URL field;
Delete removes the link and keeps its words. Click elsewhere, Escape or
typing closes it — and Escape stops there instead of also minimising the
compose window.
The toolbar's link button uses the same floating field instead of the
browser's prompt: under the selected text (kept highlighted with a CSS
highlight while the field has focus), at the caret with the address as the
text, or — with the caret inside a link — editing that link rather than
nesting a new one. A bare "example.com" becomes https://example.com.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>