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

memory-bank/projectbrief.md

@@ -81,7 +81,7 @@ hosts/
 - Mock `/etc/hosts` file I/O and DNS lookups to avoid system dependencies.
 - Include integration tests for the Textual TUI (using `textual.testing` or snapshot testing).
 
-### Implemented Tests (97 tests total)
+### Implemented Tests (149 tests total)
 
 1. **Parsing Tests** (15 tests):
    - Parse simple `/etc/hosts` with comments and disabled entries
@@ -101,20 +101,39 @@ hosts/
    - Configuration loading and saving
    - Default entry detection and filtering
 
-4. **Modal Dialog Tests** (15 tests):
-   - Configuration modal lifecycle
-   - User interaction handling
-   - Keyboard binding validation
-   - State management during configuration changes
-
-5. **Main Application Tests** (18 tests):
-   - Application initialization and startup
+4. **TUI Application Tests** (28 tests):
+   - Main application initialization and startup
    - File loading and error handling
    - User interface state management
    - Sorting and navigation functionality
+   - Modal dialog lifecycle and interactions
+   - Keyboard binding validation
+
+5. **Manager Module Tests** (38 tests):
+   - Permission management and sudo handling
+   - Edit mode operations and state transitions
+   - File backup and atomic operations
+   - Entry manipulation and validation
+
+6. **Save Confirmation Tests** (13 tests):
+   - Modal dialog lifecycle and user interactions
+   - Change detection and validation
+   - Save/discard/cancel functionality
+   - Integration with edit workflow
+
+7. **Configuration Modal Tests** (6 tests):
+   - Modal configuration interface
+   - Settings persistence and validation
+   - User interaction handling
+
+### Current Test Coverage Status
+- **Total Tests**: 149 comprehensive tests
+- **Pass Rate**: 100% (all tests passing)
+- **Coverage Areas**: Core models, file parsing, configuration, TUI components, edit operations, modal dialogs
+- **Code Quality**: 20 minor linting issues (unused imports/variables) requiring cleanup
 
 ### Future Test Areas (Planned)
-- **Edit Mode Tests**: Permission management and file modification
+- **Advanced Edit Tests**: Add/delete entries, bulk operations
 - **DNS Resolution Tests**: Hostname resolution and IP comparison
 - **Performance Tests**: Large file handling and optimization
-- **Integration Tests**: End-to-end workflow testing
+- **Search Functionality Tests**: Entry searching and filtering