feat: add build system and integration tests

- Update Makefile with test-coverage and verify targets
- Add build.sh script for cross-platform builds with SHA256 checksums
- Implement integration tests for full workflow (add/list/get/update/export/delete)
- Add config integration test
- 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 8)
+> **Last Updated**: 2024-06-23 (Session 9)
 > **Current Status**: Implementation In Progress - Tasks 1-8 Complete
 > **Phase**: MVP Development (Phase 1)
 
@@ -33,7 +33,6 @@
 ✅ **Bug Fix**: Fixed deadlock in JSON storage (RLock within Lock)
 
 ### What Needs to Happen Next
-🔄 **Task 12**: Build and Testing (Makefile, integration tests)
 🔄 **Task 13**: Documentation (README, usage docs)
 🔄 **Task 14**: Final testing and release prep
 
@@ -54,10 +53,10 @@
 | **CLI Framework** | ✅ 100% | Cobra root, version, completion commands |
 | **CLI Commands** | 🟡 70% | add + list + connect + edit + delete + export + import done |
 | **TUI** | 🟡 40% | Basic TUI with host list navigation |
-| **Testing** | 🟡 55% | Error + SSH + add + list + connect + edit + delete + TUI + export/import tests passing |
+| **Testing** | 🟡 60% | All unit + integration tests passing |
 | **Documentation** | 🔲 0% | Usage guides and API docs |
 
-### Overall Progress: **~75% Complete** (Tasks 1-11 done)
+### Overall Progress: **~80% Complete** (Tasks 1-12 done)
 
 ---
 
@@ -177,7 +176,16 @@
   - `cmd/hostkeeper/import.go` — Import command with replace/merge strategies and dry-run preview
   - `test/storage/export_import_test.go` — Integration test for export/import round-trip
 
-#### 🔲 Task 12-14: Remaining Tasks
+#### ✅ Task 12: Build and Testing
+- **Status**: ✅ Completed
+- **Priority**: HIGH
+- **Deliverables**: Build system and integration tests
+- **Files Created/Modified**:
+  - `Makefile` — Added test-coverage, verify targets; updated clean to remove coverage files
+  - `build.sh` — Cross-platform build script with SHA256 checksums
+  - `test/integration/integration_test.go` — End-to-end workflow tests (add, list, get, update, export/import, delete, config)
+
+#### 🔲 Task 13-14: Remaining Tasks
 - **Status**: Not Started
 - **Details**: See `docs/plans/2024-06-22-hostkeeper-implementation.md`
 
@@ -186,7 +194,7 @@
 ## 🗺️ Development Roadmap
 
 ### Current Week Focus
-**Target**: Complete Tasks 10+ (TUI, Export/Import)
+**Target**: Complete Tasks 12+ (Build, Testing, Docs, Release)
 
 ### This Sprint
 - [x] Project setup and dependencies
@@ -201,6 +209,8 @@
 - [x] Edit host command
 - [x] Delete host command
 - [x] TUI implementation
+- [x] Export/Import commands
+- [x] Build system and integration tests
 
 ### Next Sprint
 - [ ] TUI implementation (Bubble Tea)