docs(webapp): trim the Esc release note to what actually ships

The note claimed Esc closes detail panels and works while typing in one of
their fields. Neither ships: sheets already closed on Esc before this branch,
and the panel close shortcuts stay disabled inside inputs. It also claimed
outside clicks no longer cancel the authenticator setup, which they never did.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: claude

.server-changes/esc-to-close-fixes.md

@@ -3,4 +3,4 @@ area: webapp
 type: fix
 ---
 
-Esc now closes the authenticator app setup window, the chat panel and detail panels, and clicking outside the authenticator app setup window no longer cancels the setup. While you're typing in a field, Esc leaves that field first — clearing a search box, or keeping an unsent message — so a second Esc closes the panel and a stray Esc no longer discards what you typed or shuts a panel you were working in. Every side sheet now shows its Esc shortcut, closing a dialog with Esc no longer also closes the panel behind it, and the Vercel setup modal no longer shows a close button it ignores.
+Esc now closes the authenticator app setup window and the chat panel, and side sheets now show a close button with their Esc shortcut. Esc in the chat panel's message box just leaves the box, so an unsent message survives and a second Esc closes the panel. Closing a dialog with Esc no longer also closes the panel behind it, and the Vercel setup modal no longer shows a close button that does nothing.