fix: replace express-ejs-layouts with EJS partial includes (header/footer)

views/partials/footer.ejs

@@ -0,0 +1,11 @@
+  </div>
+  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
+  <script>
+    function logout() {
+      localStorage.removeItem('access_token');
+      localStorage.removeItem('refresh_token');
+      window.location.href = '/login';
+    }
+  </script>
+</body>
+</html>