Add comprehensive loading state management system
- Add useLoadingState hook with data/loading/error state management
- Add useSimpleLoading hook for basic boolean loading state
- Add useMultipleLoadingStates hook for tracking multiple items
- Create Skeleton component with shimmer animation for placeholders
- Create specialized skeletons: SkeletonText, SkeletonAvatar, SkeletonCard,
SkeletonListItem, SkeletonBeneficiaryCard, SkeletonSensorCard
- Create LoadingOverlay components: modal, inline, and card variants
- Create ScreenLoading wrapper with loading/error/content states
- Create RefreshableScreen with built-in pull-to-refresh
- Create EmptyState and LoadingButtonState utility components
- Add comprehensive tests for all components and hooks (61 tests passing)
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Co-Authored-By: Claude <noreply@anthropic.com>
Sergei
2b36f801f1