Feature Request: Add Russian language support (already implemented in PR)

Hello! I've implemented Russian language localization for GoClaw and submitted a PR (#TBD).

What's included:

Web UI | 35 JSON files | ~3,921
Desktop UI | 15 JSON files | ~2,100
Backend | catalog_ru.go | 186 messages

PR: https://github.com/nextlevelbuilder/goclaw/pull/765

Would appreciate any feedback or review!