integration test fixes

src/routes/ai.routes.test.ts

@@ -86,12 +86,15 @@ describe('AI Routes (/api/ai)', () => {
       // Arrange
       const mkdirError = new Error('EACCES: permission denied');
       vi.resetModules(); // Reset modules to re-run top-level code
-      vi.doMock('node:fs', () => ({
-        ...fs,
-        mkdirSync: vi.fn().mockImplementation(() => {
-          throw mkdirError;
-        }),
-      }));
+      vi.doMock('node:fs', () => {
+        const mockFs = {
+          ...fs,
+          mkdirSync: vi.fn().mockImplementation(() => {
+            throw mkdirError;
+          }),
+        };
+        return { ...mockFs, default: mockFs };
+      });
       const { logger } = await import('../services/logger.server');
 
       // Act: Dynamically import the router to trigger the mkdirSync call

src/routes/auth.routes.ts

@@ -381,7 +381,7 @@ router.post('/logout', async (req: Request, res: Response) => {
   // Instruct the browser to clear the cookie by setting its expiration to the past.
   res.cookie('refreshToken', '', {
     httpOnly: true,
-    expires: new Date(0),
+    maxAge: 0, // Use maxAge for modern compatibility; Express sets 'Expires' as a fallback.
     secure: process.env.NODE_ENV === 'production',
   });
   res.status(200).json({ message: 'Logged out successfully.' });