Adds comprehensive UI component test coverage with 54 new test cases across three components to close issue #23. Includes JSDOM setup polyfills and tooltip mock utilities for DOM-dependent component testing.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add SHA comparison in pushFile to detect remote changes before pushing
- Update syncMetadata (lastSyncedSha) after successful push and pull
- Add comprehensive test cases for conflict scenarios and metadata updates
- Use syncMetadata to track state and prevent overwriting remote work
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>