Update README and localization files to enhance project description, add error messages, and improve Persian translations.

app/layouts/default.vue

@@ -0,0 +1,23 @@
+<template>
+  <div class="layout-default">
+    <!-- Default layout wrapper -->
+    <slot />
+  </div>
+</template>
+
+<script setup lang="ts">
+/**
+ * Default Layout
+ * 
+ * This is a minimal example layout demonstrating Nuxt's layout system.
+ * To use this layout in a page, add: definePageMeta({ layout: 'default' })
+ * 
+ * Learn more: https://nuxt.com/docs/guide/directory-structure/layouts
+ */
+</script>
+
+<style scoped>
+.layout-default {
+  /* Add default layout styles here */
+}
+</style>