docs(healthchat): complete the 26.11.0 release notes

HEALTHCHAT_CHANGES.md

@@ -9,16 +9,34 @@ matches `## Changes in <version>` exactly.
 
 Upstream's `CHANGES.md` tracks element-hq's own releases and must not be edited here.
 
-## Changes in 26.11.0 (2026-10-16)
+## Changes in 26.11.0 (2026-10-19)
+
+✨ Features
+
+- Message search: a new Search tab finds messages across all chats, including encrypted ones.
+  The index is built and kept on the device only; older history is indexed while the phone is
+  idle and charging.
+- Forwarding: the picker suggests recently visited chats and loads beyond the first 100 rooms.
+- Unread counts: the Chats tab shows the number of unread notifications.
 
 🙌 Improvements
 
 - Synced with upstream Element X 26.10.3 (Rust SDK 26.10.15).
-- Message search: a new Search tab finds messages across all chats, including encrypted ones.
-  The index is built on the device.
-- Notifications: unread counts on the Chats tab, stale notifications for rooms read elsewhere
-  are cleared, tapping a notification opens the room at its newest message.
-- Fixes for signing back in after a soft logout and for iOS 27 layouts.
+- Notifications: stale notifications for chats read on another device are cleared, tapping a
+  notification opens the chat at its newest message, and a new "Show all activity" setting
+  explains what it covers.
+- Recovery and chat backup switched to the new high-entropy passphrase mechanism.
+- Faster image uploads: preparation no longer blocks the interface.
+- Layout and colour fixes for iOS 27 and the new tab bar.
+
+🐛 Bugfixes
+
+- Crash when signing back in after a soft logout.
+- Crash when confirming the server twice during sign-in.
+- Media viewer no longer gets stuck on "Loading more…" when swiping.
+- Formatting-only edits of a message render again.
+- Failed reactions are shown as a send failure on the message.
+- Background refresh now waits for the session to restore before syncing.
 
 ⚠️ Known issues