Merge pull request 'fix: display user messages in chat interface' (#48) from fix/display-user-messages into main

Previously, only the assistant's response was added to the frontend store.
Now both user and assistant messages are stored, so the conversation
displays correctly in the chat interface.

src/frontend/src/routes/bot/[id]/+page.svelte

@@ -44,6 +44,9 @@
 		
 		isSending = true;
 
+		// Add user's message immediately
+		addMessage({ role: 'user', content: message });
+
 		try {
 			const response = await api.bots.chat(botId, message);
 			addMessage({ role: 'assistant', content: response.response });