feat(service-registry): update E2E tests and add migration docs
E2E test updates:
- Update page objects (DashboardPage, ServiceCardPage, etc.)
- Fix test selectors for card, list, smoke, and toolbar specs
- Add preview mode config to vite.config.ts
Add migration documentation:
- MIGRATION_SUMMARY.md: Overview of @ui component migration
- COMPONENT_MIGRATION_DIFF.md: Detailed component analysis
- README_MIGRATION.md: Migration instructions
- VISUAL_COMPARISON.md: Visual comparison guide
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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