feat: implement basic TUI framework with host list

- Add Bubble Tea TUI model with Init/Update/View
- Implement host list screen with keyboard navigation (up/down/enter/q)
- Add styled rendering for hosts, selection, tags
- Create hostkeeper tui CLI command
- Add tests for TUI initialization and host loading
- Update project state documentation

PROJECT_STATE.md

@@ -2,7 +2,7 @@
 
 > **Purpose**: Enable seamless continuation of development by any agent/LLM across sessions
 > 
-> **Last Updated**: 2024-06-23 (Session 6)
+> **Last Updated**: 2024-06-23 (Session 7)
 > **Current Status**: Implementation In Progress - Tasks 1-8 Complete
 > **Phase**: MVP Development (Phase 1)
 
@@ -33,8 +33,8 @@
 ✅ **Bug Fix**: Fixed deadlock in JSON storage (RLock within Lock)
 
 ### What Needs to Happen Next
-🔄 **Task 10**: TUI implementation (Bubble Tea)
 🔄 **Task 11**: Export/Import commands
+🔄 Key management commands
 🔄 Build and test core features
 🔄 Prepare MVP release
 
@@ -54,11 +54,11 @@
 | **SSH Client** | ✅ 100% | Password + key auth, Execute, Connect/Close |
 | **CLI Framework** | ✅ 100% | Cobra root, version, completion commands |
 | **CLI Commands** | 🟡 60% | add + list + connect + edit + delete commands done |
-| **TUI** | 🔲 0% | Terminal user interface |
-| **Testing** | 🟡 50% | Error + SSH + add + list + connect + edit + delete tests passing |
+| **TUI** | 🟡 40% | Basic TUI with host list navigation |
+| **Testing** | 🟡 50% | Error + SSH + add + list + connect + edit + delete + TUI tests passing |
 | **Documentation** | 🔲 0% | Usage guides and API docs |
 
-### Overall Progress: **~65% Complete** (Tasks 1-9 + edit/delete done)
+### Overall Progress: **~70% Complete** (Tasks 1-10 done)
 
 ---
 
@@ -159,7 +159,17 @@
   - `cmd/hostkeeper/delete.go` — Delete command with --force flag to skip confirmation
   - `cmd/hostkeeper/delete_test.go` — Tests for command existence, alias, and flags
 
-#### 🔲 Task 10-14: Remaining Tasks
+#### ✅ Task 10: Basic TUI Implementation
+- **Status**: ✅ Completed
+- **Priority**: HIGH
+- **Deliverables**: Bubble Tea TUI with host list screen
+- **Files Created**:
+  - `pkg/tui/tui.go` — TUI model with Init/Update/View (Bubble Tea)
+  - `pkg/tui/host_list.go` — Host list renderer with keyboard navigation
+  - `pkg/tui/tui_test.go` — Tests for TUI initialization and host loading
+  - `cmd/hostkeeper/tui.go` — CLI `tui` command
+
+#### 🔲 Task 11-14: Remaining Tasks
 - **Status**: Not Started
 - **Details**: See `docs/plans/2024-06-22-hostkeeper-implementation.md`
 
@@ -168,7 +178,7 @@
 ## 🗺️ Development Roadmap
 
 ### Current Week Focus
-**Target**: Complete Tasks 9+ (Core CLI Commands)
+**Target**: Complete Tasks 10+ (TUI, Export/Import)
 
 ### This Sprint
 - [x] Project setup and dependencies
@@ -182,6 +192,7 @@
 - [x] Connect host command
 - [x] Edit host command
 - [x] Delete host command
+- [x] TUI implementation
 
 ### Next Sprint
 - [ ] TUI implementation (Bubble Tea)
@@ -548,7 +559,7 @@ cat go.mod
 - [x] Milestone 1: Foundation (Tasks 1-6) - Week 1 ✅ COMPLETE
 - [x] Task 7-9: Add, List, Connect commands ✅ COMPLETE
 - [x] Edit & Delete commands ✅ COMPLETE
-- [ ] Milestone 2: Core Features (Tasks 7-10) - Week 2-3 (85% complete)
+- [x] Milestone 2: Core Features (Tasks 7-10) - Week 2-3 ✅ COMPLETE
 - [ ] Milestone 3: Polish & Release (Tasks 11-14) - Week 4
 
 ---