fix: guard chat:tasks:cancel handler with message_id check

Author: Algorithm5838

src/lib/components/chat/Chat.svelte

@@ -438,11 +438,14 @@
 				} else if (type === 'chat:completion') {
 					chatCompletionEventHandler(data, message, event.chat_id);
 				} else if (type === 'chat:tasks:cancel') {
-					taskIds = null;
-					const responseMessage = history.messages[history.currentId];
-					// Set all response messages to done
-					for (const messageId of history.messages[responseMessage.parentId].childrenIds) {
-						history.messages[messageId].done = true;
+					if (event.message_id === history.currentId) {
+						taskIds = null;
+						// Set all response messages to done
+						for (const messageId of history.messages[message.parentId].childrenIds) {
+							history.messages[messageId].done = true;
+						}
+					} else {
+						message.done = true;
 					}
 				} else if (type === 'chat:message:delta' || type === 'message') {
 					message.content += data.content;