fix(ci): remove npm cache to fix frontend test setup

- Cache config was causing setup failure
- Backend tests already passing
- Frontend tests should now run without cache

Author: thanhdevapp

.github/workflows/ci.yml

@@ -42,8 +42,6 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: '18'
-          cache: 'npm'
-          cache-dependency-path: './frontend/package-lock.json'
 
       - name: Install dependencies
         run: npm ci