fix: apply retention to forked and duplicated conversations

The fork and duplicate paths created the import batch builder without the
runtime interface config, so under retentionMode "ephemeral" a fork or
duplicate of an existing permanent conversation skipped the forced
isTemporary/expiredAt fields and bypassed the policy.

Plumb req.config.interfaceConfig through forkConversation and
duplicateConversation into the builder so cloned records honor retention.

api/server/routes/convos.js

@@ -359,6 +359,7 @@ router.post('/fork', forkIpLimiter, forkUserLimiter, async (req, res) => {
       records: true,
       splitAtTarget,
       option,
+      interfaceConfig: req.config?.interfaceConfig,
     });
 
     res.json(result);
@@ -376,6 +377,7 @@ router.post('/duplicate', forkIpLimiter, forkUserLimiter, async (req, res) => {
       userId: req.user.id,
       conversationId,
       title,
+      interfaceConfig: req.config?.interfaceConfig,
     });
     res.status(201).json(result);
   } catch (error) {

api/server/utils/import/fork.js

@@ -81,7 +81,8 @@ function cloneMessagesWithTimestamps(messagesToClone, importBatchBuilder) {
  * @param {boolean} [params.records=false] - Optional flag for returning actual database records or resulting conversation and messages.
  * @param {boolean} [params.splitAtTarget=false] - Optional flag for splitting the messages at the target message level.
  * @param {string} [params.latestMessageId] - latestMessageId - Required if splitAtTarget is true.
- * @param {(userId: string) => ImportBatchBuilder} [params.builderFactory] - Optional factory function for creating an ImportBatchBuilder instance.
+ * @param {(userId: string, interfaceConfig?: object) => ImportBatchBuilder} [params.builderFactory] - Optional factory function for creating an ImportBatchBuilder instance.
+ * @param {object} [params.interfaceConfig] - Runtime interface config used to apply retention to cloned records.
  * @returns {Promise<TForkConvoResponse>} The response after forking the conversation.
  */
 async function forkConversation({
@@ -94,6 +95,7 @@ async function forkConversation({
   splitAtTarget = false,
   latestMessageId,
   builderFactory = createImportBatchBuilder,
+  interfaceConfig,
 }) {
   try {
     const originalConvo = await getConvo(requestUserId, originalConvoId);
@@ -110,7 +112,7 @@ async function forkConversation({
       targetMessageId = latestMessageId;
     }
 
-    const importBatchBuilder = builderFactory(requestUserId);
+    const importBatchBuilder = builderFactory(requestUserId, interfaceConfig);
     importBatchBuilder.startConversation(originalConvo.endpoint ?? EModelEndpoint.openAI);
 
     let messagesToClone = [];
@@ -500,9 +502,10 @@ async function forkSharedConversation({
  * @param {string} params.userId - The ID of the user duplicating the conversation.
  * @param {string} params.conversationId - The ID of the conversation to duplicate.
  * @param {string} [params.title] - Optional title override for the duplicate.
+ * @param {object} [params.interfaceConfig] - Runtime interface config used to apply retention to cloned records.
  * @returns {Promise<{ conversation: TConversation, messages: TMessage[] }>} The duplicated conversation and messages.
  */
-async function duplicateConversation({ userId, conversationId, title }) {
+async function duplicateConversation({ userId, conversationId, title, interfaceConfig }) {
   const originalConvo = await getConvo(userId, conversationId);
   if (!originalConvo) {
     throw new Error('Conversation not found');
@@ -518,7 +521,7 @@ async function duplicateConversation({ userId, conversationId, title }) {
     originalMessages[originalMessages.length - 1].messageId,
   );
 
-  const importBatchBuilder = createImportBatchBuilder(userId);
+  const importBatchBuilder = createImportBatchBuilder(userId, interfaceConfig);
   importBatchBuilder.startConversation(originalConvo.endpoint ?? EModelEndpoint.openAI);
 
   cloneMessagesWithTimestamps(messagesToClone, importBatchBuilder);

api/server/utils/import/fork.spec.js

@@ -1,4 +1,4 @@
-const { Constants, ForkOptions } = require('librechat-data-provider');
+const { Constants, ForkOptions, RetentionMode } = require('librechat-data-provider');
 
 jest.mock('~/models', () => ({
   getConvo: jest.fn(),
@@ -107,6 +107,28 @@ describe('forkConversation', () => {
     bulkSaveMessages.mockResolvedValue(null);
   });
 
+  test('applies ephemeral retention to forked conversation and messages', async () => {
+    await forkConversation({
+      originalConvoId: 'abc123',
+      targetMessageId: '3',
+      requestUserId: 'user1',
+      option: ForkOptions.DIRECT_PATH,
+      interfaceConfig: { retentionMode: RetentionMode.EPHEMERAL, temporaryChatRetention: 1 },
+    });
+
+    expect(bulkSaveConvos).toHaveBeenCalledWith(
+      expect.arrayContaining([
+        expect.objectContaining({ isTemporary: true, expiredAt: expect.any(Date) }),
+      ]),
+    );
+    expect(bulkSaveMessages).toHaveBeenCalledWith(
+      expect.arrayContaining([
+        expect.objectContaining({ isTemporary: true, expiredAt: expect.any(Date) }),
+      ]),
+      true,
+    );
+  });
+
   test('should fork conversation without branches', async () => {
     const result = await forkConversation({
       originalConvoId: 'abc123',
@@ -264,6 +286,26 @@ describe('duplicateConversation', () => {
     bulkIncrementTagCounts.mockResolvedValue(null);
   });
 
+  test('applies ephemeral retention to duplicated conversation and messages', async () => {
+    await duplicateConversation({
+      userId: 'user1',
+      conversationId: 'abc123',
+      interfaceConfig: { retentionMode: RetentionMode.EPHEMERAL, temporaryChatRetention: 1 },
+    });
+
+    expect(bulkSaveConvos).toHaveBeenCalledWith(
+      expect.arrayContaining([
+        expect.objectContaining({ isTemporary: true, expiredAt: expect.any(Date) }),
+      ]),
+    );
+    expect(bulkSaveMessages).toHaveBeenCalledWith(
+      expect.arrayContaining([
+        expect.objectContaining({ isTemporary: true, expiredAt: expect.any(Date) }),
+      ]),
+      true,
+    );
+  });
+
   test('should duplicate conversation and increment tag counts', async () => {
     const mockConvoWithTags = {
       ...mockConversation,