Update project documentation: reflect completion of Phase 4 advanced edit features and adjust test coverage status for improved clarity.

memory-bank/systemPatterns.md

@@ -101,32 +101,41 @@ class Config:
 - ✅ **Error handling**: Graceful degradation for all error conditions
 - ✅ **Modal state**: Professional modal dialog lifecycle management
 - ✅ **Change detection**: Intelligent tracking for save confirmation
+- ✅ **Dirty state tracking**: Implemented with save confirmation modal
 - 🔄 **Undo/Redo capability**: Planned for Phase 4 with command pattern
-- 🔄 **Dirty state tracking**: Will be implemented in Phase 3 edit mode
 
-### Permission Model (Planned for Phase 3)
+### Permission Model (✅ Implemented)
 ```python
-# Current implementation (read-only mode)
+# Current implementation with complete edit mode
 class HostsManagerApp:
-    edit_mode: reactive[bool] = reactive(False)  # Always False in Phase 1
+    edit_mode: reactive[bool] = reactive(False)
     
     def update_status(self):
         mode = "Edit mode" if self.edit_mode else "Read-only mode"
         # Status bar shows current mode
 
-# Planned for Phase 3:
+# Implemented PermissionManager:
 class PermissionManager:
     def __init__(self):
         self.edit_mode = False
         self.sudo_acquired = False
     
     def enter_edit_mode(self) -> bool:
-        # Request sudo permissions
-        # Set edit_mode = True only if successful
+        """Request sudo permissions and enter edit mode."""
+        if self._request_sudo():
+            self.edit_mode = True
+            self.sudo_acquired = True
+            return True
+        return False
     
     def exit_edit_mode(self):
-        # Release sudo permissions
-        # Set edit_mode = False
+        """Release sudo permissions and exit edit mode."""
+        self.edit_mode = False
+        self.sudo_acquired = False
+    
+    def _request_sudo(self) -> bool:
+        """Request sudo permissions from user."""
+        # Implementation with password modal and validation
 ```
 
 ## Design Patterns in Use
@@ -269,27 +278,27 @@ class ConfigModal(ModalScreen):
 5. ✅ **Default entry filtering**: Hide/show system entries based on configuration
 6. ✅ **Intelligent IP sorting**: Proper IPv4/IPv6 numerical sorting
 
-### Edit Mode Activation (🔄 Planned for Phase 3)
-1. 🔄 **User triggers edit mode**: Keyboard shortcut implementation
-2. 🔄 **Request sudo**: Secure password prompt
-3. 🔄 **Validate permissions**: Ensure write access to `/etc/hosts`
-4. 🔄 **Update UI state**: Enable edit operations and visual indicators
-5. 🔄 **Maintain permissions**: Keep sudo active until explicit exit
+### Edit Mode Activation (✅ Implemented)
+1. ✅ **User triggers edit mode**: 'e' key keyboard shortcut implementation
+2. ✅ **Request sudo**: Secure password prompt with modal dialog
+3. ✅ **Validate permissions**: Ensure write access to `/etc/hosts`
+4. ✅ **Update UI state**: Enable edit operations and visual indicators
+5. ✅ **Maintain permissions**: Keep sudo active until explicit exit
 
-### Entry Modification (🔄 Planned for Phase 3-4)
-1. 🔄 **User action**: Toggle, reorder, or edit entry operations
-2. 🔄 **Create command**: Command pattern for undo/redo support
-3. 🔄 **Validate operation**: Real-time validation of changes
-4. 🔄 **Execute command**: Apply changes to in-memory state
-5. 🔄 **Update UI**: Immediate visual feedback
-6. 🔄 **Track dirty state**: Mark file as needing save
+### Entry Modification (✅ Implemented)
+1. ✅ **User action**: Toggle (space), reorder (Shift+Up/Down) entry operations
+2. ✅ **Change tracking**: Intelligent detection of original vs. current values
+3. ✅ **Validate operation**: Real-time validation of changes
+4. ✅ **Execute operation**: Apply changes to in-memory state
+5. ✅ **Update UI**: Immediate visual feedback with status updates
+6. ✅ **Track dirty state**: Mark file as needing save with confirmation modal
 
-### File Persistence (🔄 Planned for Phase 3)
-1. 🔄 **User saves**: Explicit save command or auto-save option
-2. 🔄 **Validate entire file**: Comprehensive syntax checking
-3. 🔄 **Create backup**: Automatic backup before modifications
-4. 🔄 **Write atomically**: Safe temporary file + rename operation
-5. 🔄 **Verify write**: Confirm successful file write
+### File Persistence (✅ Implemented)
+1. ✅ **User saves**: Explicit save confirmation modal with save/discard/cancel
+2. ✅ **Validate entire file**: Comprehensive syntax checking before write
+3. ✅ **Create backup**: Automatic backup with timestamp before modifications
+4. ✅ **Write atomically**: Safe temporary file + rename operation
+5. ✅ **Verify write**: Confirm successful file write with error handling
 
 ### DNS Resolution Flow (🔄 Planned for Phase 5)
 1. 🔄 **User requests resolution**: For entries with DNS names
@@ -314,13 +323,13 @@ class ConfigModal(ModalScreen):
 - **Color-coded entries**: Visual distinction between active/inactive entries
 - **Sort indicators**: Visual arrows showing current sort column and direction
 - **Interactive headers**: Click feedback and hover states for column sorting
-- **Progress indicators**: For long-running operations (planned for Phase 3)
+- **Progress indicators**: For long-running operations (planned for future phases)
 
 ### Recovery Mechanisms
 - **Configuration fallback**: Automatic fallback to defaults on configuration errors
 - **Position restoration**: Intelligent cursor position maintenance on reload
 - **Error isolation**: Configuration errors don't affect core functionality
 - **Undo operations**: Allow reverting recent changes (planned for Phase 4)
-- **File restoration**: Restore from backup if available (planned for Phase 3)
+- **File restoration**: Restore from backup if available (implemented with automatic backup system)
 - **Safe mode**: Minimal functionality if errors occur
 - **Graceful exit**: Always attempt to save valid changes and configuration