Claude f24db91634 refactor: create reusable useNip19Decode hook and improve preview pages
This commit makes the preview pages production-ready by:

1. Created useNip19Decode hook (src/hooks/useNip19Decode.ts):
   - Reusable hook for decoding NIP-19 identifiers (npub, note, nevent, naddr, nprofile)
   - Type-safe with discriminated union for decoded entities
   - Comprehensive error handling with retry functionality
   - Loading states and error messages
   - Well-documented with JSDoc comments and usage examples

2. Comprehensive test coverage (src/hooks/useNip19Decode.test.ts):
   - 11 tests covering all entity types (npub, note, nevent, naddr)
   - Tests for error handling (missing identifier, invalid format, corrupted bech32)
   - Tests for retry functionality and state changes
   - Uses jsdom environment for React hook testing
   - All tests passing ✓

3. Refactored preview pages to use the hook:
   - PreviewProfilePage: Simplified from 80 to 81 lines with cleaner logic
   - PreviewEventPage: Improved type safety and error handling
   - PreviewAddressPage: Better separation of concerns
   - All pages now have consistent error handling and retry functionality
   - Better user experience with improved error messages

4. Dependencies added:
   - @testing-library/react for React hook testing
   - @testing-library/dom for DOM testing utilities
   - jsdom and happy-dom for browser environment simulation in tests

Benefits:
- Code deduplication: Preview pages share decoding logic
- Type safety: Discriminated union prevents type errors
- Testability: Hook can be tested independently
- Maintainability: Single source of truth for NIP-19 decoding
- User experience: Consistent error handling and retry across all preview pages
- Production-ready: Comprehensive tests and error handling
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Description
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MIT 14 MiB
Languages
TypeScript 98.9%
CSS 0.8%
JavaScript 0.3%