chore(lightspeed): added changeset for bug fix (#2958)

* chore(lightspeed): added changeset for bug fix

Signed-off-by: Yi Cai <yicai@redhat.com>

* updated documentation for this change

Signed-off-by: Yi Cai <yicai@redhat.com>

---------

Signed-off-by: Yi Cai <yicai@redhat.com>

Author: ciiay

workspaces/lightspeed/.changeset/retain-chat-state-rhdhbugs-2977.md

@@ -0,0 +1,6 @@
+---
+'@red-hat-developer-hub/backstage-plugin-lightspeed': patch
+'@red-hat-developer-hub/backstage-plugin-lightspeed-backend': patch
+---
+
+Retain Lightspeed chat and tool-call state when the chat UI remounts (for example when switching display mode between embedded and overlay), so the active thread and tool metadata are not dropped while messages are still streaming or before history refetches.

workspaces/lightspeed/plugins/lightspeed/README.md

@@ -85,7 +85,11 @@ Lightspeed is a front-end plugin that enables you to interact with any LLM serve
 #### Procedure
 
 1. Open your Backstage application and select a Lightspeed nav item from the **Navigation**.
-2. Ask you questions to the Lightspeed chatbot.
+2. Ask your questions to the Lightspeed chatbot.
+
+### Display modes and chat continuity
+
+Lightspeed supports multiple **display modes** from Settings (for example overlay, docked, embedded, and fullscreen). Switching modes can remount the chat surface; your **current conversation** and **tool-call metadata** for that thread stay with the session so the active chat is not reset. Live streaming text may not update continuously across a mode switch until the assistant response finishes loading.
 
 ### MCP servers settings