fix: display user full name from single name field

Align account display with the merged name schema that no longer uses surname.

src/layouts/AccountLayout.vue

@@ -35,8 +35,7 @@ const router = useRouter()
 
 const initials = computed(() => {
   const name = auth.user?.name || ''
-  const surname = auth.user?.surname || ''
-  return `${name.charAt(0)}${surname.charAt(0)}` || 'گ'
+  return name.charAt(0) || 'گ'
 })
 
 async function handleLogout() {

src/stores/authStore.js

@@ -11,7 +11,7 @@ export const useAuthStore = defineStore('auth', () => {
   const isAuthenticated = computed(() => !!accessToken.value)
   const fullName = computed(() => {
     if (!user.value) return ''
-    return `${user.value.name || ''} ${user.value.surname || ''}`.trim()
+    return `${user.value.name || ''}`.trim()
   })
 
   function setTokens(access, refresh) {