fix error handling, type safety, and several bugs

[YashejShah]

summary

spent some time going through the codebase and found a bunch of issues worth fixing — from actual bugs to type safety gaps.

highlights

error handling

• errorBoundary was casting Error objects to string, turning every error message into [object Object]. fixed to properly extract message and preserve stack traces
• added res.ok checks on all geo module fetch calls — 404/500 responses were being parsed as JSON and silently failing

phone number module

• matchesEntirely was constructing a new RegExp on every call with complex country patterns. added a cache to avoid redundant compilation
• cleanPhoneNumber had a nonsensical (?!A)\+ regex — simplified to actually do what it's supposed to

currency

• convertToMinorUnit was using floating point multiplication (amount * multiplier) which is unreliable for currency math. switched to Math.round
• formatNumber was accepting hex strings and Infinity as valid numbers

react provider

• updateI18nState had a stale closure bug — global state was being set with old values instead of the updated ones
• useI18nContext error check never fired because the default context value was {} (truthy). fixed by using undefined as default

types

• removed several unnecessary as any casts
• fixed direction type that was 'ltr' | 'rtl' | string (equivalent to just string)
• fixed rawParts.value from unknown to string

dates

• day validation regex was accepting values like 99 — added proper range check
• relative time was using exactly 30 days/month and 365 days/year

all changes are backwards compatible.

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