📝 docs(CLAUDE): update documentation with response language requirement

- add "always response in chinese" to document response language requirement

CLAUDE.md

@@ -53,4 +53,5 @@ This is a full-stack TypeScript application using:
 - Vite for both dev server and production builds
 - SSR (Server-Side Rendering) setup with Hono.js
 - Environment variables via `.env` file
-- Port 8080 for development and production
+- Port 8080 for development and production
+- always response in chinese