chore: add changeset for cross-app authentication callbacks (#7955)

Author: charIeszhao

.changeset/pretty-snails-deny.md

@@ -0,0 +1,17 @@
+---
+"@logto/integration-tests": minor
+"@logto/experience": minor
+"@logto/core": minor
+---
+
+support cross-app authentication callbacks within the same browser session
+
+When multiple applications are initiating authentication requests within the same browser session,
+authentication callbacks may interfere with each other due to the shared `_interaction` cookie.
+
+To resolve this, we now change the cookie from a plain UID string to a structured mapping object
+`{ [app_id]: interaction_uid }`, and maintain the `app_id` in either the URL search parameters or HTTP
+headers for all authentication-related requests and redirects. This ensures that each application can
+correctly identify its own authentication context without interference from others.
+
+The fallback mechanism is also implemented to ensure backward compatibility.