diff --git a/ui/src/pages/UserDetail.vue b/ui/src/pages/UserDetail.vue
index 72e6af0..fd41520 100644
--- a/ui/src/pages/UserDetail.vue
+++ b/ui/src/pages/UserDetail.vue
@@ -12,7 +12,7 @@
       <div class="filter-bar row q-col-gutter-md q-mb-sm">
         <div class="col-3">
           <div class="text-caption text-grey-7 q-mb-xs">Kullanıcı Kodu</div>
-          <q-input v-model="form.code" dense filled />
+          <q-input v-model="form.code" dense filled :rules="[codeRule]" lazy-rules />
         </div>
 
         <div class="col-4">
@@ -341,6 +341,11 @@ async function onSave () {
     return
   }
 
+  if (!(form.value.code || '').trim()) {
+    $q.notify({ type: 'negative', message: 'Kullanıcı kodu zorunludur' })
+    return
+  }
+
   try {
     console.log('🟢 onSave() START', { mode: mode.value })