[BUG] Desktop app: Code view sidebar stays in English despite ja-JP locale (web is fully translated)

Environment

• Claude desktop app (macOS): 1.18286.0 (latest)
• Bundled Claude Code: 2.1.197
• macOS system language: Japanese

Description

In the desktop app's Code view, sidebar labels render in English —
"Pinned", "Recents", "New session", "Artifacts" — even though every
locale setting resolves to Japanese:

• App config (~/Library/Application Support/Claude/config.json): "locale": "ja-JP"
• macOS system language: Japanese
• claude.ai account language: Japanese

Meanwhile the same view on the web (claude.ai/code, same account,
browser locale ja) is fully localized: ピン留め済み / 最近の項目 /
新規セッション / アーティファクト.

So Japanese translations for these strings already exist server-side —
the desktop Code frontend just doesn't apply (or ship) them, and the
affected strings fall back to their English source text.

Expected

Desktop Code view matches the web localization (Japanese).

Actual

Mixed-language UI: most of the app is Japanese, but the Code sidebar
headers/buttons remain English.