Describe the issue

The current locale file is named fa_ir, but Nuxt i18n expects the key to be fa in order to properly match it with the fa locale defined in nuxt.config.ts.

This causes the following issues:

• The i18n system doesn't correctly map the fa locale to the available translation data.
• Locale switching and automatic detection may fail or behave unexpectedly.
• Using locales[locale.value] results in undefined when locale.value === 'fa'.