public ChatClient() {
        // Default constructor
    }

    /**
     * Checks if RAG chat is available.
     *
     * @return true if RAG chat is available
     */
    public boolean isAvailable() {
        final boolean available = llmClientManager.available();
        if (logger.isTraceEnabled()) {
            logger.trace("[RAG] ChatClient availability check. available={}", available);
        }
        return available;

            httpClient = null;
        }
    }

    /**
     * Starts periodic availability checking if RAG chat is enabled.
     */
    protected void startAvailabilityCheck() {
        if (!isRagChatEnabled()) {
            if (logger.isDebugEnabled()) {
                logger.debug("RAG chat is disabled. Skipping availability check.");
            }
            return;
        }

#                                                  RAG Chat
#                                                     ------

# Whether RAG chat feature is enabled.
rag.chat.enabled=false


# Chat generation settings.
rag.chat.context.max.documents=5

# Session settings.
rag.chat.session.timeout.minutes=30
rag.chat.session.max.size=10000
rag.chat.history.max.messages=30

		<dependency>
			<groupId>org.apache.groovy</groupId>
			<artifactId>groovy</artifactId>
			<version>${groovy.version}</version>
		</dependency>

		<!-- markdown and html sanitization for RAG chat -->
		<dependency>
			<groupId>org.commonmark</groupId>
			<artifactId>commonmark</artifactId>
			<version>0.24.0</version>
		</dependency>
		<dependency>
			<groupId>org.commonmark</groupId>

                                                 styleClass="form-control"/>
                                    </div>
                                </div>
                                    <%-- RAG --%>
                                <c:if test="${ragEnabled}">
                                <h4><la:message key="labels.general_rag"/></h4>
                                <div class="form-group row">

    }

    // ========== History content mode pattern tests ==========
    // These test the different history shapes that extractHistory() produces
    // depending on rag.chat.history.assistant.content mode (full, source_titles,
    // source_titles_and_urls, truncated, none).

    @Test
    public void test_buildIntentRequest_noneMode_userOnlyHistory() {