Implement TUI pane navigation

memory-bank/activeContext.md

@@ -2,8 +2,8 @@
 
 ## Current Work Focus
 
-**Status**: Phase 2 In Progress - Basic TUI prototype implemented
-**Priority**: Expand Bubble Tea TUI with navigation and view features
+**Status**: Phase 2 Complete - Basic TUI prototype finished
+**Priority**: Begin Phase 3 - Edit mode and file integration
 
 ## Recent Changes
 
@@ -17,6 +17,12 @@
 - ✅ **Comprehensive testing**: 54 comprehensive tests covering all parser functionality (100% passing)
 - ✅ **Demo application**: Full showcase of parser capabilities with real-world examples
 
+### Phase 2: TUI Prototype (COMPLETED) ✅
+- ✅ **Two-pane layout** with list and detail panes
+- ✅ **Navigation system** with pane switching and detail scrolling
+- ✅ **View mode** showing entry details and status bar
+- ✅ **Parser integration** loading `/etc/hosts` into the UI
+
 ### Parser Capabilities Achieved
 - ✅ **Standard entries**: IPv4, IPv6, multiple aliases, inline comments
 - ✅ **Disabled entries**: Commented lines with `# IP hostname` format detection
@@ -35,33 +41,14 @@
 
 ## Next Steps
 
-### Immediate (Phase 2 - Current Priority)
-1. **TUI Architecture Design** ✅
-   - Main Bubble Tea model with list and detail panes
-   - State tracks selection and window size
-
-2. **Two-Pane Layout Implementation** ✅
-   - Left pane: entry list using Bubbles list component
-   - Right pane: detail view of selected entry
-   - Responsive sizing handled in update
-
-3. **Navigation System** 🟡
-   - Basic keyboard navigation via list component
-   - Need scroll handling and pane switching
-
-4. **View Mode Implementation** 🟡
-   - Read-only display of `/etc/hosts` entries
-   - Status bar and active/inactive indicators in list implemented
-   - Further styling improvements pending
-
-### Medium-term (Phase 3)
+### Immediate (Phase 3 - Current Priority)
 1. **Edit Mode Implementation**
    - Explicit mode transition with visual indicators
    - Permission handling with sudo request
    - Entry modification forms with validation
 
 2. **File Integration**
-   - Connect TUI with existing parser functionality
+   - Connect TUI with existing parser functionality for writes
    - Real-time display of actual `/etc/hosts` content
    - Live validation and formatting preview