Function createNewThread

frontend/src/components/chat/chat-panel.tsx:603–650

(
    initialMessage: string,
    initialAttachments?: File[],
  )

  }, [activeChatId]);

  const createNewThread = async (
    initialMessage: string,
    initialAttachments?: File[],
  ) => {
    const now = Date.now();
    const newChat: Chat = {
      id: chatId as ChatId,
      title: generateChatTitle(initialMessage),
      messages: [],
      createdAt: now,
      updatedAt: now,
    };

    // Create new chat and set as active
    setChatState((prev) => {
      const newChats = new Map(prev.chats);
      newChats.set(newChat.id, newChat);
      const newState = {
        ...prev,
        chats: newChats,
        activeChatId: newChat.id,
      };
      return newState;
    });

    const fileParts =
      initialAttachments && initialAttachments.length > 0
        ? await convertToFileUIPart(initialAttachments)
        : undefined;
    const { contextPart, attachments } =
      await resolveChatContext(initialMessage);

    // Trigger AI conversation with append
    sendMessage({
      role: "user",
      parts: [
        {
          type: "text" as const,
          text: initialMessage,
        },
        ...(contextPart ? [contextPart] : []),
        ...(fileParts ?? []),
        ...attachments,
      ],
    });
    clearFiles();
    setInput("");
  };

  const handleNewChat = useEvent(() => {
    setActiveChat(null);