Merge pull request #7 from BitcoinErrorLog/feature/graffiti-drawing

feat: Implement comprehensive expert review recommendations

Author: BitcoinErrorLog

graphiti/COMPREHENSIVE_EXPERT_REVIEW.md

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+# Implement Medium Priority Improvements from Expert Review
+
+## Summary
+
+This PR implements all medium priority improvements identified in the comprehensive expert review, addressing code quality, test coverage, and accessibility concerns.
+
+## Changes
+
+### ✅ Code Duplication - Fixed
+- **Removed** duplicate `src/utils/pubky-api.ts` file (legacy code not in use)
+- All imports use `pubky-api-sdk.ts` (the active implementation)
+- No breaking changes - legacy file was not imported anywhere
+
+### ✅ Test Coverage - Expanded
+- **Added 15+ new test cases** for background script covering:
+  - Edge cases (missing data, storage errors, API errors)
+  - Error scenarios (offscreen bridge failures, sync errors)
+  - Resilience testing (graceful error handling)
+- Tests verify no unhandled exceptions and appropriate fallback behavior
+
+### ✅ Accessibility - Enhanced
+- **Added comprehensive ARIA labels** to all interactive components:
+  - All buttons have descriptive `aria-label` attributes
+  - Form inputs have `aria-label` and `aria-describedby`
+  - Required fields marked with `aria-required="true"`
+  - Interactive elements have descriptive labels
+  - Bookmark button has `aria-pressed` state
+- **Added focus indicators** for keyboard navigation:
+  - All interactive elements have `focus:outline-none focus:ring-2` classes
+  - Color-coded focus rings matching element themes
+  - Consistent 2px ring width for visibility
+
+### ✅ Documentation - Updated
+- Updated `EXPERT_REVIEW.md` to reflect completed improvements
+- Added `IMPROVEMENTS_IMPLEMENTED.md` with detailed summary
+
+## Files Modified
+
+### Deleted
+- `src/utils/pubky-api.ts` (duplicate legacy code)
+
+### Modified
+- `src/background/__tests__/background.test.ts` - Added 15+ edge case tests
+- `src/popup/components/MainView.tsx` - ARIA labels and focus indicators
+- `src/popup/components/ProfileEditor.tsx` - ARIA labels and focus indicators
+- `src/sidepanel/components/PostCard.tsx` - ARIA labels and focus indicators
+- `EXPERT_REVIEW.md` - Updated to reflect completed improvements
+
+### Added
+- `IMPROVEMENTS_IMPLEMENTED.md` - Detailed implementation summary
+
+## Testing
+
+- ✅ All existing tests pass
+- ✅ New tests added for edge cases and error scenarios
+- ✅ Code compiles without errors
+- ✅ TypeScript types are correct
+- ✅ No breaking changes
+
+## Impact
+
+- **More maintainable**: No duplicate code
+- **Better tested**: Comprehensive edge case coverage
+- **More accessible**: ARIA labels and focus indicators improve WCAG compliance
+- **Production-ready**: All improvements align with best practices
+
+## Related
+
+Addresses medium priority recommendations from:
+- Code Quality Expert Review
+- Testing Expert Review  
+- UX/UI Expert Review
+
+## Checklist
+
+- [x] Code follows project style guidelines
+- [x] Tests added/updated and passing
+- [x] Documentation updated
+- [x] No breaking changes
+- [x] Accessibility improvements verified
+- [x] All expert review recommendations addressed