Refactor documentation: update active context, progress, project brief, system patterns, tech context to reflect code quality maintenance and testing improvements

memory-bank/progress.md

@@ -39,16 +39,6 @@
 - ✅ **Modal system**: Proper modal dialogs with keyboard bindings
 - ✅ **Configuration persistence**: Settings saved to ~/.config/hosts-manager/
 
-### Documentation
-- ✅ **Project brief**: Comprehensive project definition and requirements
-- ✅ **Product context**: User experience goals and problem definition
-- ✅ **Technical context**: Technology stack and development setup
-- ✅ **System patterns**: Architecture, design patterns, and implementation paths
-- ✅ **Active context**: Current work focus and next steps
-
-## What's Left to Build
-
-
 ### Phase 3: Edit Mode Foundation ✅ COMPLETE
 - ✅ **Permission management**: Sudo request and management with PermissionManager class
 - ✅ **Edit mode toggle**: Switch between read-only and edit modes with 'e' key
@@ -68,6 +58,20 @@
 - ✅ **Change detection**: Intelligent tracking of original vs. current entry values
 - ✅ **No auto-save**: Changes saved only when explicitly confirmed by user
 
+### Documentation
+- ✅ **Project brief**: Comprehensive project definition and requirements
+- ✅ **Product context**: User experience goals and problem definition
+- ✅ **Technical context**: Technology stack and development setup
+- ✅ **System patterns**: Architecture, design patterns, and implementation paths
+- ✅ **Active context**: Current work focus and next steps
+
+## What's Left to Build
+
+### Immediate Priority: Code Quality Cleanup
+- ❌ **Fix linting issues**: Address 20 unused import and variable warnings
+- ❌ **Code quality validation**: Ensure all ruff checks pass with zero issues
+- ❌ **Maintain test coverage**: Keep 149 tests passing during cleanup
+
 ### Phase 4: Advanced Edit Features
 - ❌ **Add new entries**: Create new host entries
 - ❌ **Delete entries**: Remove host entries
@@ -91,19 +95,9 @@
 ## Current Status
 
 ### Development Stage
-**Stage**: Phase 3 Complete with Save Confirmation Enhancement - Ready for Phase 4
-**Progress**: 78% (Complete edit mode foundation with professional save confirmation)
-**Next Milestone**: Advanced edit features (add/delete entries, bulk operations)
-
-### Phase 2 Final Achievements
-1. ✅ **Advanced configuration system**: Complete settings management with persistence
-2. ✅ **Professional modal dialogs**: Configuration modal with proper keyboard bindings
-3. ✅ **Intelligent filtering**: Hide/show default system entries based on user preference
-4. ✅ **Complete sorting system**: Sort by IP address and hostname with direction toggle
-5. ✅ **Rich visual interface**: Color-coded entries with professional DataTable styling
-6. ✅ **Interactive headers**: Click column headers to sort data
-7. ✅ **Enhanced user experience**: Visual sort indicators and comprehensive status information
-8. ✅ **Robust configuration**: JSON-based settings with graceful error handling
+**Stage**: Phase 3 Complete with Code Quality Maintenance Required
+**Progress**: 82% (Complete edit mode foundation with save confirmation, code cleanup needed)
+**Next Milestone**: Code quality cleanup, then Phase 4 advanced edit features
 
 ### Phase 3 Final Achievements ✅ COMPLETE
 1. ✅ **Permission management**: Complete PermissionManager class with sudo request and validation
@@ -114,22 +108,17 @@
 6. ✅ **Manager module**: Complete HostsManager class for all edit operations
 7. ✅ **Safe file operations**: Atomic file writing with rollback capability
 8. ✅ **Enhanced error messages**: Professional read-only mode error messages with clear instructions
-9. ✅ **Comprehensive testing**: 38 new tests for manager module (148 total tests)
+9. ✅ **Comprehensive testing**: Full test coverage for manager module (149 total tests)
 10. ✅ **Save confirmation modal**: Professional save/discard/cancel dialog when exiting edit entry mode
 11. ✅ **Change detection system**: Intelligent tracking of original vs. current entry values
 12. ✅ **No auto-save behavior**: User-controlled saving with explicit confirmation
 
-### Recent Major Accomplishments
-- ✅ **Complete Phase 3 implementation**: Full edit mode foundation with permission management
-- ✅ **Manager module**: PermissionManager and HostsManager classes with comprehensive functionality
-- ✅ **Edit mode integration**: Seamless integration with main TUI application
-- ✅ **Permission system**: Robust sudo request, validation, and release functionality
-- ✅ **File backup system**: Automatic backup creation with timestamp naming
-- ✅ **Entry manipulation**: Toggle active/inactive and reorder entries safely
-- ✅ **Save confirmation enhancement**: Professional modal dialog system for editing workflow
-- ✅ **Comprehensive testing**: 161 total tests with 100% pass rate including save confirmation
-- ✅ **Error handling**: Graceful handling of permission errors and file operations
-- ✅ **Keyboard shortcuts**: Complete set of edit mode bindings (e, space, Ctrl+Up/Down, Ctrl+S)
+### Current Project State
+- **Application functionality**: Fully functional with advanced edit capabilities
+- **Test coverage**: 149 tests with 100% pass rate covering all functionality
+- **Code quality issue**: 20 linting issues (unused imports/variables) need cleanup
+- **Architecture**: Robust layered design ready for Phase 4 advanced features
+- **User experience**: Professional TUI with modal dialogs and comprehensive keyboard shortcuts
 
 ## Technical Implementation Details
 
@@ -142,11 +131,13 @@
 ### Test Coverage Excellence
 - **Models**: 27 comprehensive tests covering all data model edge cases
 - **Parser**: 15 tests covering file operations, permissions, and error conditions
-- **Coverage**: 100% of core functionality with edge case validation
+- **Manager**: Comprehensive tests for permission management and edit operations
+- **UI Components**: Full coverage of modal dialogs and TUI interactions
+- **Total**: 149 tests with 100% pass rate and comprehensive edge case coverage
 - **Quality**: All tests passing consistently with fast execution
 
 ### Code Quality Standards
-- **Linting**: Perfect ruff compliance with zero issues
+- **Linting**: 20 minor issues (unused imports/variables) requiring cleanup
 - **Type hints**: Complete type coverage throughout entire codebase
 - **Documentation**: Comprehensive docstrings and inline comments
 - **Error handling**: Graceful exception handling with user feedback
@@ -154,7 +145,14 @@
 
 ## Known Issues
 
-### Phase 3 Enhancement Opportunities
+### Immediate Code Quality Issues
+- **Linting warnings**: 20 unused import and variable warnings in core and test files
+- **Code standard compliance**: Must address before proceeding to Phase 4
+- **Auto-fixable**: All issues can be resolved with `uv run ruff check --fix`
+
+### Phase 4 Enhancement Opportunities
+- **Add new entries**: Create new host entries with validation (planned for Phase 4)
+- **Delete entries**: Remove host entries with confirmation (planned for Phase 4)
 - **Search functionality**: Find entries by hostname or IP address (planned for Phase 4)
 - **Help modal**: Proper help dialog instead of status message (planned for Phase 4)
 - **Large file performance**: Not yet tested with very large hosts files