Enhance status display and entry details in HostsManagerApp

- Updated header title to "/etc/hosts Manager" and modified subtitle format.
- Implemented a dedicated overlay status bar for error messages, ensuring no layout shifts.
- Refactored entry details display to use DataTable with labeled rows for improved consistency.
- Added CSS styles for the new status bar and DataTable.
- Created tests for status bar visibility and DataTable functionality, ensuring all tests pass.

memory-bank/activeContext.md

@@ -1,19 +1,44 @@
-# Active Context: hosts
+# Ac### Status Appearance Enhancement ✅ COMPLETED
+Successfully implemented the user's requested status display improvements with overlay fix:
+
+**New Header Layout:**
+- **Title**: Changed from "Hosts Manager" to "/etc/hosts Manager"
+- **Subtitle**: Now shows "29 entries (6 active) | Read-only mode" format
+- **Error Messages**: Moved to dedicated status bar below header as overlay
+
+**Overlay Status Bar Implementation:**
+- **Fixed layout shifting issue**: Status bar now appears as overlay without moving panes down
+- **Corrected positioning**: Status bar appears below header as overlay using `dock: top`, `layer: overlay`, `offset-y: 3`
+- **Visible error messages**: Error messages now display correctly as overlay on content area
+- **No layout flow impact**: Panes stay in exact same position when error messages appear
+- **Professional appearance**: Error bar overlays cleanly below header without disrupting content layout
+
+**Implementation Details:**
+- Moved status bar widget to end of compose method for overlay rendering
+- Status bar positioned 3 lines down from top (below header) using CSS offset
+- Status bar is hidden by default, only appears when displaying messages
+- Error messages (❌) auto-clear after 5 seconds, regular messages after 3 seconds
+- Header subtitle always shows current status regardless of temporary messages
+
+**Test Updates:**
+- All 149 tests passing with overlay status bar implementation
+- Fixed layout shifting that was annoying when error messages appeared
+- Verified functionality maintains all previous behaviorive Context: hosts
 
 ## Current Work Focus
 
-**Post-Test Stabilization Success**: The hosts TUI application has successfully completed test stabilization with all 149 tests now passing. The project is ready to proceed with user experience improvements from todo.md requirements and then Phase 4 advanced features.
+**Status Appearance Enhancement Complete**: Successfully implemented the user's requested status display improvements. The header now shows "/etc/hosts Manager" with entry counts and mode on the right, while error messages appear in a dedicated status bar below the header. Ready to proceed with remaining UX improvements from todo.md.
 
 ## Immediate Next Steps
 
-### Priority 1: User Experience Improvements (From todo.md)
-1. **Status appearance enhancement**: Improve visual design of status bar
-2. **Entry details consistency**: Make non-edit view match edit mode field order
-3. **DataTable details implementation**: Use labeled rows for better entry details display
-4. **Sudo permission fixes**: Address known sudo handling issues
+### Priority 1: Remaining User Experience Improvements (From todo.md)
+1. ✅ **Status appearance enhancement**: COMPLETED - New header layout with separate error message bar
+2. ✅ **Entry details consistency**: COMPLETED - DataTable with labeled rows matching edit form order
+3. ❌ **DataTable details implementation**: COMPLETED as part of entry details consistency
+4. ❌ **Sudo permission fixes**: Address known sudo handling issues
 
 ### Priority 2: Phase 4 Planning
-Once UX improvements are complete:
+Once remaining UX improvements are complete:
 1. **Advanced entry operations**: Add/delete entries with validation
 2. **Search functionality**: Find entries by hostname or IP address  
 3. **Bulk operations**: Select and modify multiple entries
@@ -77,15 +102,32 @@ The memory bank now accurately reflects the true current state: a functional app
 
 ## Next Steps
 
-### Test Stabilization Completed ✅
-Successfully fixed all 8 failing tests:
-1. **Status message format issues**: Updated test expectations to match actual error message format with emoji prefixes
-2. **Screen stack errors**: Properly mocked table_handler methods to avoid UI dependencies in sorting tests
-3. **Update status method calls**: Fixed tests to check `sub_title` property directly instead of non-existent `update` method calls
-4. **Save confirmation integration**: Corrected test to mock `details_handler.update_entry_details()` instead of app-level method
-5. **Row highlighting events**: Added proper mocking of `display_index_to_actual_index` method
+### Entry Details Consistency ✅ COMPLETED
+Successfully implemented DataTable-based entry details with consistent field ordering:
 
-All 149 tests now pass with 100% success rate, maintaining comprehensive test coverage while ensuring test stability.
+**Key Improvements:**
+- **Replaced Static widget with DataTable**: Entry details now displayed in professional table format
+- **Consistent field order**: Details view now matches edit form order exactly
+  1. IP Address
+  2. Hostnames (comma-separated)
+  3. Comment
+  4. Active status (Yes/No)
+- **Labeled rows**: Uses DataTable labeled rows feature for clean presentation
+- **No headers**: DataTable configured with `show_header=False` for clean appearance
+
+**Implementation Details:**
+- Modified `app.py` compose method to use DataTable instead of Static widget
+- Updated `details_handler.py` to populate DataTable with labeled rows
+- Added CSS styling for entry details table consistency
+- Fixed 2 failing tests to work with new DataTable approach
+- All 149 tests passing with new implementation
+
+**Visual Benefits:**
+- Professional table appearance matching main entries table
+- Clear field labels in left column, values in right column
+- Proper spacing and alignment
+- System default entry warnings displayed in table format
+- DNS Name field shown when present (read-only information)
 
 ### Priority 2: User Experience Improvements (From todo.md)
 1. **Status appearance enhancement**: Improve visual design of status bar