refactor: extract hooks and components from high-complexity views
Reduce complexity in ProfileContainer, AccountCheckoutContainer, and JapanAddressForm
by extracting reusable hooks, components, and utilities.
ProfileContainer (705 → 132 lines):
- Extract useProfileDataLoading hook for consolidated data loading
- Extract useVerificationFileUpload hook for file upload state
- Create VerificationCard component for verification UI
- Create ProfileLoadingSkeleton for loading state
- Update PersonalInfoCard with phone field and additional fields
- Update AddressCard to use Button component
AccountCheckoutContainer (382 → 303 lines):
- Extract useCheckoutEligibility hook for eligibility state
- Extract useCheckoutFormState and useCanSubmit hooks
- Extract useCheckoutToast hook for toast timing
- Create checkout-navigation utilities
- Create CheckoutErrorFallback component
JapanAddressForm (727 → 437 lines):
- Extract AnimatedSection, ProgressIndicator, BilingualValue components
- Extract useAddressCompletion hook for completion state
- Extract useJapanAddressForm hook for form state/handlers
- Create japan-address.constants and street-address.validation utilities
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