Merge branch '4.x' of https://github.com/craftcms/cms into 5.x

# Conflicts:
#	CHANGELOG.md

Author: brandonkelly

CHANGELOG.md

@@ -13,6 +13,7 @@
 - Fixed a bug where custom field values weren’t always retaining changes after changing an entry type. ([#17768](https://github.com/craftcms/cms/issues/17768))
 - Fixed a bug where JSON fields weren’t initializing properly when they weren’t on the initially-shown field layout tab. ([#17772](https://github.com/craftcms/cms/issues/17772))
 - Fixed a bug where the Live Preview drag bar’s hit area was only 2px wide. ([#17781](https://github.com/craftcms/cms/issues/17781))
+- Updated the bundled composer.phar to 2.7.7. ([#17796](https://github.com/craftcms/cms/issues/17796))
 
 ## 5.8.15 - 2025-08-13