Method patchStreamingContent

chat/components/ChatArea.js:972–1002

(contentEl, processedContent)

     */
    getMessageTextFromDOM(messageId) {
        const messageEl = document.querySelector(`[data-message-id="${messageId}"]`);
        if (!messageEl) return null;

        const contentEl = messageEl.querySelector('.message-content');
        if (contentEl) {
            const contentClone = contentEl.cloneNode(true);
            contentClone.querySelectorAll('.code-block-copy-btn').forEach(el => el.remove());
            return contentClone.innerText || contentClone.textContent;
        }
        return null;
    }

    /**
     * Checks whether a message is actively streaming in the current DOM.
     * @param {string} messageId - The message ID
     * @returns {boolean} True when the DOM is still in a streaming state
     */
    isMessageStreamingInDOM(messageId) {
        const messageEl = document.querySelector(`[data-message-id="${messageId}"]`);
        if (!messageEl) return false;

        return !!(
            messageEl.querySelector('.message-content.streaming, .reasoning-content.streaming') ||
            messageEl.querySelector('.pending-response-label')
        );
    }

    /**
     * Gets raw message content from a data attribute (sync, Safari-safe).
     * @param {string} messageId - The message ID
     * @returns {string|null} The raw content or null
     */
    getMessageRawFromDOM(messageId) {
        if (!RAW_CLIPBOARD_ATTRIBUTE_ENABLED) return null;