feat: add chat:message:favorite event for action functions (#20375)

* feat: add chat:message:favorite event for action functions

* Update Chat.svelte

* Update Chat.svelte

src/lib/components/chat/Chat.svelte

@@ -390,6 +390,9 @@
 					if (autoScroll) {
 						scrollToBottom('smooth');
 					}
+				} else if (type === 'chat:message:favorite') {
+					// Update message favorite status
+					message.favorite = data.favorite;
 				} else if (type === 'chat:title') {
 					chatTitle.set(data);
 					currentChatPage.set(1);