The old CurrencyInput had ~100 LOC of regex-based parsing,
display-state syncing, and caret/focus juggling. react-number-format
ships a 17-LOC equivalent (NumericFormat with customInput pointing
at our shared Input shell) that handles the edge cases the hand-
rolled version missed: paste sanitisation, IME composition,
selection-caret preservation, locale separator switching.
Same external API on CurrencyInput so all 3 call sites
(berth-form, invoice-line-items, expense-form-dialog) keep working
without changes.
Verified: tsc clean, vitest 1315/1315, next build green.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Matt
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