add tracking event for model submission

frontend/src/pages/AddModelPage/components/ModelSubmissionForm/ModelSubmissionForm.js

@@ -160,6 +160,12 @@ function ModelSubmissionForm({ user, isAuthenticated }) {
 
       setSubmittedData(formData);
       setSuccess(true);
+
+      if (window.gtag && formData.modelName) {
+        window.gtag("event", "submit_model", {
+          model: formData.modelName,
+        });
+      }
     } catch (error) {
       setError(error.message);
     } finally {