🏺 fix: Restore Archive Functionality with Dedicated Endpoint (#11183)

The archive conversation feature was broken after the `/api/convos/update`
route was modified to only handle title updates. The frontend was sending
`{ conversationId, isArchived }` to the update endpoint, but the backend
was only extracting `title` and ignoring the `isArchived` field entirely.

This fix implements a dedicated `/api/convos/archive` endpoint to restore
the archive/unarchive functionality.

Changes:

packages/data-provider/src/api-endpoints.ts:
- Add `archiveConversation()` endpoint returning `/api/convos/archive`

packages/data-provider/src/data-service.ts:
- Update `archiveConversation()` to use dedicated archive endpoint

api/server/routes/convos.js:
- Add `POST /archive` route with validation for `conversationId` (required)
  and `isArchived` (must be boolean)

api/server/routes/__tests__/convos.spec.js:
- Add test coverage for archive endpoint (success, validation, error cases)

api/server/routes/__tests__/convos.spec.js

@@ -109,7 +109,7 @@ describe('Convos Routes', () => {
   let app;
   let convosRouter;
   const { deleteAllSharedLinks, deleteConvoSharedLink } = require('~/models');
-  const { deleteConvos } = require('~/models/Conversation');
+  const { deleteConvos, saveConvo } = require('~/models/Conversation');
   const { deleteToolCalls } = require('~/models/ToolCall');
 
   beforeAll(() => {
@@ -461,6 +461,138 @@ describe('Convos Routes', () => {
       expect(deleteConvoSharedLink).toHaveBeenCalledAfter(deleteConvos);
     });
   });
+
+  describe('POST /archive', () => {
+    it('should archive a conversation successfully', async () => {
+      const mockConversationId = 'conv-123';
+      const mockArchivedConvo = {
+        conversationId: mockConversationId,
+        title: 'Test Conversation',
+        isArchived: true,
+        user: 'test-user-123',
+      };
+
+      saveConvo.mockResolvedValue(mockArchivedConvo);
+
+      const response = await request(app)
+        .post('/api/convos/archive')
+        .send({
+          arg: {
+            conversationId: mockConversationId,
+            isArchived: true,
+          },
+        });
+
+      expect(response.status).toBe(200);
+      expect(response.body).toEqual(mockArchivedConvo);
+      expect(saveConvo).toHaveBeenCalledWith(
+        expect.objectContaining({ user: { id: 'test-user-123' } }),
+        { conversationId: mockConversationId, isArchived: true },
+        { context: `POST /api/convos/archive ${mockConversationId}` },
+      );
+    });
+
+    it('should unarchive a conversation successfully', async () => {
+      const mockConversationId = 'conv-456';
+      const mockUnarchivedConvo = {
+        conversationId: mockConversationId,
+        title: 'Unarchived Conversation',
+        isArchived: false,
+        user: 'test-user-123',
+      };
+
+      saveConvo.mockResolvedValue(mockUnarchivedConvo);
+
+      const response = await request(app)
+        .post('/api/convos/archive')
+        .send({
+          arg: {
+            conversationId: mockConversationId,
+            isArchived: false,
+          },
+        });
+
+      expect(response.status).toBe(200);
+      expect(response.body).toEqual(mockUnarchivedConvo);
+      expect(saveConvo).toHaveBeenCalledWith(
+        expect.objectContaining({ user: { id: 'test-user-123' } }),
+        { conversationId: mockConversationId, isArchived: false },
+        { context: `POST /api/convos/archive ${mockConversationId}` },
+      );
+    });
+
+    it('should return 400 when conversationId is missing', async () => {
+      const response = await request(app)
+        .post('/api/convos/archive')
+        .send({
+          arg: {
+            isArchived: true,
+          },
+        });
+
+      expect(response.status).toBe(400);
+      expect(response.body).toEqual({ error: 'conversationId is required' });
+      expect(saveConvo).not.toHaveBeenCalled();
+    });
+
+    it('should return 400 when isArchived is not a boolean', async () => {
+      const response = await request(app)
+        .post('/api/convos/archive')
+        .send({
+          arg: {
+            conversationId: 'conv-123',
+            isArchived: 'true',
+          },
+        });
+
+      expect(response.status).toBe(400);
+      expect(response.body).toEqual({ error: 'isArchived must be a boolean' });
+      expect(saveConvo).not.toHaveBeenCalled();
+    });
+
+    it('should return 400 when isArchived is undefined', async () => {
+      const response = await request(app)
+        .post('/api/convos/archive')
+        .send({
+          arg: {
+            conversationId: 'conv-123',
+          },
+        });
+
+      expect(response.status).toBe(400);
+      expect(response.body).toEqual({ error: 'isArchived must be a boolean' });
+      expect(saveConvo).not.toHaveBeenCalled();
+    });
+
+    it('should return 500 when saveConvo fails', async () => {
+      const mockConversationId = 'conv-error';
+      saveConvo.mockRejectedValue(new Error('Database error'));
+
+      const response = await request(app)
+        .post('/api/convos/archive')
+        .send({
+          arg: {
+            conversationId: mockConversationId,
+            isArchived: true,
+          },
+        });
+
+      expect(response.status).toBe(500);
+      expect(response.text).toBe('Error archiving conversation');
+
+      const { logger } = require('@librechat/data-schemas');
+      expect(logger.error).toHaveBeenCalledWith('Error archiving conversation', expect.any(Error));
+    });
+
+    it('should handle empty arg object', async () => {
+      const response = await request(app).post('/api/convos/archive').send({
+        arg: {},
+      });
+
+      expect(response.status).toBe(400);
+      expect(response.body).toEqual({ error: 'conversationId is required' });
+    });
+  });
 });
 
 /**

api/server/routes/convos.js

@@ -152,6 +152,37 @@ router.delete('/all', async (req, res) => {
   }
 });
 
+/**
+ * Archives or unarchives a conversation.
+ * @route POST /archive
+ * @param {string} req.body.arg.conversationId - The conversation ID to archive/unarchive.
+ * @param {boolean} req.body.arg.isArchived - Whether to archive (true) or unarchive (false).
+ * @returns {object} 200 - The updated conversation object.
+ */
+router.post('/archive', validateConvoAccess, async (req, res) => {
+  const { conversationId, isArchived } = req.body.arg ?? {};
+
+  if (!conversationId) {
+    return res.status(400).json({ error: 'conversationId is required' });
+  }
+
+  if (typeof isArchived !== 'boolean') {
+    return res.status(400).json({ error: 'isArchived must be a boolean' });
+  }
+
+  try {
+    const dbResponse = await saveConvo(
+      req,
+      { conversationId, isArchived },
+      { context: `POST /api/convos/archive ${conversationId}` },
+    );
+    res.status(200).json(dbResponse);
+  } catch (error) {
+    logger.error('Error archiving conversation', error);
+    res.status(500).send('Error archiving conversation');
+  }
+});
+
 /** Maximum allowed length for conversation titles */
 const MAX_CONVO_TITLE_LENGTH = 1024;