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Both verified unused at the source/config level (Fable #461 + audit note #460): - cupertino_icons: zero `CupertinoIcons` / cupertino imports in flutter_client/lib/. Pure `flutter create` template residue; the design system mandates Lucide. - tslib: web/tsconfig.json does not set `importHelpers: true`, so TypeScript inlines helpers per-file. Declared peer with no runtime consumer. `npm uninstall tslib --save-dev` updated package-lock.json surgically (8 lines removed for the tslib entry only). No other deps disturbed. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>