separaded endpoints + cleaned page templates + added constants to time formatting

Backend/endpoints/user-settings.go

@@ -43,5 +43,5 @@ func showUserPage(w http.ResponseWriter, r *http.Request, status int) {
 	if user, err := models.GetUserFromSession(Session, r.Context()); err == nil {
 		ctx = context.WithValue(r.Context(), "user", user)
 	}
-	templates.UserPage(status).Render(ctx, w)
+	templates.SettingsPage(status).Render(ctx, w)
 }