} catch (final IOException ioe) {
                    logger.warn("Failed to send error response. error={}", ioe.getMessage());
                }
            }
        }
    }

    /**
     * Sends a Server-Sent Event (SSE) to the client.
     *
     * @param writer the print writer to write the event to
     * @param event the event name

    /**
     * Periodic poll that sends a heartbeat, processes new events, and cleans up expired documents.
     */
    protected void poll() {
        try {
            sendHeartbeat();
        } catch (final Exception e) {
            logger.debug("Failed to send heartbeat in poll.", e);
        }

        try {

            setup.setup(form -> {
                updateForm(fessConfig, form);
            });
        });
    }

    /**
     * Sends a test mail using the provided notification settings.
     *
     * @param form the mail form containing notification settings
     * @return HTML response after sending test mail
     */
    @Execute

            // notification
            try {
                crawler.sendMail(infoMap);
            } catch (final Exception e) {
                logger.warn("Failed to send notification mail.", e);
            }

        }
    }

    /**
     * Sends email notification with crawling results and statistics.
     * The email contains detailed information about the crawling session including

import org.codelibs.fess.mylasta.mail.LogNotificationPostcard;
import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.mail.send.hook.SMailCallbackContext;
import org.lastaflute.core.mail.Postbox;
import org.opensearch.action.bulk.BulkRequestBuilder;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.index.query.QueryBuilders;

labels.chat_step_intent=Analyze
labels.chat_step_search=Search
labels.chat_step_evaluate=Evaluate
labels.chat_step_fetch=Retrieve
labels.chat_step_answer=Answer
labels.chat_input_hint=Press Enter to send, Shift+Enter for new line
labels.chat_send=Send message
labels.chat_retry=Retry
labels.chat_dismiss=Dismiss
labels.chat_copied=Copied!
labels.chat_copy_failed=Copy failed

labels.chat_filter=Filter

labels.chat_step_intent=Analyze
labels.chat_step_search=Search
labels.chat_step_evaluate=Evaluate
labels.chat_step_fetch=Retrieve
labels.chat_step_answer=Answer
labels.chat_input_hint=Press Enter to send, Shift+Enter for new line
labels.chat_send=Send message
labels.chat_retry=Retry
labels.chat_dismiss=Dismiss
labels.chat_copied=Copied!
labels.chat_copy_failed=Copy failed
labels.chat_filter=Filter

errors.cannot_delete_doc_because_of_running = A crawler is running. You cannot delete documents.
errors.failed_to_delete_doc_in_admin = Failed to delete a document.
errors.failed_to_send_testmail=Failed to send a test mail.
errors.invalid_query_unknown = The specified query has an unknown condition.
errors.invalid_query_parse_error = The given query is invalid.
errors.invalid_query_sort_value = The specified sort {0} is invalid.

errors.cannot_delete_doc_because_of_running = A crawler is running. You cannot delete documents.
errors.failed_to_delete_doc_in_admin = Failed to delete a document.
errors.failed_to_send_testmail=Failed to send a test mail.
errors.invalid_query_unknown = The specified query has an unknown condition.
errors.invalid_query_parse_error = The given query is invalid.
errors.invalid_query_sort_value = The specified sort {0} is invalid.

    public static final String LABELS_chat_step_answer = "{labels.chat_step_answer}";

    /** The key of the message: Press Enter to send, Shift+Enter for new line */
    public static final String LABELS_chat_input_hint = "{labels.chat_input_hint}";

    /** The key of the message: Send message */
    public static final String LABELS_chat_send = "{labels.chat_send}";

    /** The key of the message: Retry */