2872

Fixed

• Duplicate Localization Key — Removed duplicate "Unknown" key that appeared twice in all Strings.strings files (en, es, it, ja, nl, pt-BR, ru).
• Untranslated Language Copies — Marked Italian (it) and Japanese (ja) Strings.strings files with TODO comments indicating they are English copies awaiting real translation.
• Incomplete Simplified Chinese — Expanded zh-Hans.lproj/Strings.strings to match the full key set from en.lproj/Strings.strings; the existing 加载中 translation is preserved and remaining keys are English stubs pending translation.