chore: update changelog

CHANGELOG.md

@@ -1,9 +1,9 @@
-Changelog for ownCloud Web [unreleased] (UNRELEASED)
+Changelog for ownCloud Web [12.4.0] (2026-05-22)
 =======================================
-The following sections list the changes in ownCloud web unreleased relevant to
+The following sections list the changes in ownCloud web 12.4.0 relevant to
 ownCloud admins and users.
 
-[unreleased]: https://github.com/owncloud/web/compare/v12.3.3...master
+[12.4.0]: https://github.com/owncloud/web/compare/v12.3.3...v12.4.0
 
 Summary
 -------
@@ -18,6 +18,12 @@ Summary
 * Enhancement - Use spaceId: [#13577](https://github.com/owncloud/web/pull/13577)
 * Enhancement - Add theme mode: [#13631](https://github.com/owncloud/web/pull/13631)
 * Enhancement - Support log and conf files in text editor: [#13632](https://github.com/owncloud/web/issues/13632)
+* Enhancement - Show correct modal for saveAs and open actions: [#13759](https://github.com/owncloud/web/pull/13759)
+* Enhancement - Add vault search separation: [#13769](https://github.com/owncloud/web/pull/13769)
+* Enhancement - Add new theme colors: [#13795](https://github.com/owncloud/web/pull/13795)
+* Enhancement - Check vault permission: [#13802](https://github.com/owncloud/web/pull/13802)
+* Enhancement - MFA session expiry warning: [#13803](https://github.com/owncloud/web/pull/13803)
+* Enhancement - Vault-aware breadcrumbs: [#13803](https://github.com/owncloud/web/pull/13803)
 
 Details
 -------
@@ -106,6 +112,55 @@ Details
    https://github.com/owncloud/web/issues/13632
    https://github.com/owncloud/web/pull/13650
 
+* Enhancement - Show correct modal for saveAs and open actions: [#13759](https://github.com/owncloud/web/pull/13759)
+
+   We've added logic to show the correct modal when the user clicks on "Save As" or
+   "Open" from the 3 dots context menu.
+
+   https://github.com/owncloud/web/pull/13759
+
+* Enhancement - Add vault search separation: [#13769](https://github.com/owncloud/web/pull/13769)
+
+   We've implemented vault search separation by adding the `vault:true` query token
+   to the `<oc:pattern>` search payload. The token is now included in both "All
+   files" and "Current folder" search requests, ensuring vault content is correctly
+   scoped in all search scenarios.
+
+   https://github.com/owncloud/web/pull/13769
+
+* Enhancement - Add new theme colors: [#13795](https://github.com/owncloud/web/pull/13795)
+
+   We've added new theme colors. These new colors are:
+
+   - background-sidebar - search-input-text-default - search-input-text-muted -
+   search-input-border - search-input-bg
+
+   https://github.com/owncloud/web/pull/13795
+
+* Enhancement - Check vault permission: [#13802](https://github.com/owncloud/web/pull/13802)
+
+   When the user has the `VaultMode.ReadWriteEnabled.own` permission, the mode
+   switch will be shown in the topbar.
+
+   https://github.com/owncloud/web/pull/13802
+
+* Enhancement - MFA session expiry warning: [#13803](https://github.com/owncloud/web/pull/13803)
+
+   We've added a warning modal that notifies users before their multi-factor
+   authentication session expires. Users can extend the session via silent OIDC
+   renewal or dismiss the warning. The modal state is synchronized across multiple
+   browser tabs using a BroadcastChannel.
+
+   https://github.com/owncloud/web/pull/13803
+
+* Enhancement - Vault-aware breadcrumbs: [#13803](https://github.com/owncloud/web/pull/13803)
+
+   We've introduced vault-aware breadcrumbs that show Vault or Drive as the root
+   item depending on the active scope. Users without vault access see the original
+   labels instead.
+
+   https://github.com/owncloud/web/pull/13803
+
 Changelog for ownCloud Web [12.3.3] (2026-04-27)
 =======================================
 The following sections list the changes in ownCloud web 12.3.3 relevant to