fix: preventDefault() forget

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

src/modules/admin/pages/courses/AddCourse.jsx

@@ -189,7 +189,12 @@ export default function AddCourse() {
     }
   };
 
-  const handleNext = async () => {
+  const handleNext = async (e) => {
+    // The Next button occupies the same DOM position as the eventual
+    // type="submit" Create Course button. Advancing the step re-renders
+    // that node's type attribute in place *before* the browser evaluates
+    // this click's default action, which would otherwise submit the form.
+    e.preventDefault();
     if (currentStep === 0) {
       const valid = await trigger(["title", "subscription", "objectives"]);
       if (!valid) return;