refactor(i18n): rename locales directory to translations

- Rename locales/ to translations/ for better clarity
- Update import path in src/i18n/request.ts to use translations directory
- Maintain same structure: components.json, pages/, shared.json per locale
- No changes to translation content

Author: ericyangpan

src/i18n/request.ts

@@ -12,7 +12,7 @@ export default getRequestConfig(async ({ requestLocale }) => {
   }
 
   // Import raw messages and resolve references centrally
-  const rawMessages = (await import(`../../locales/${locale}/index.ts`)).default
+  const rawMessages = (await import(`../../translations/${locale}/index.ts`)).default
   const messages = resolveReferences(rawMessages)
 
   return {