[Bug] Standalone installer uses small-icu, ignoring system locale for date formatting

Bug Description
⏺ The standalone Claude Code installer bundles Node.js with small-icu (en-US only locale data), causing dates to display in MM/dd/yyyy format regardless of system
locale. Users with non-US regional settings (e.g. en-NZ) who install via the standalone binary see incorrect date formatting, whereas the npm installer correctly
inherits the system Node.js's full ICU data.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.1.94
• Feedback ID: c20b7c57-cae9-4419-8f83-9f4d6258bc32

Errors

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