refactor: consolidate blockchain explorer into single app and update backup ignore patterns

- Remove standalone explorer-web app (README, HTML, package files)
- Add /web endpoint to blockchain-explorer for web interface access
- Update .gitignore to exclude application backup archives (*.tar.gz, *.zip)
- Add backup documentation files to .gitignore (BACKUP_INDEX.md, README.md)
- Consolidate explorer functionality into main blockchain-explorer application

cli/tests/validate_test_structure.py

@@ -0,0 +1,99 @@
+#!/usr/bin/env python3
+"""
+Validate the CLI Level 1 test structure
+"""
+
+import os
+import sys
+from pathlib import Path
+
+def validate_test_structure():
+    """Validate that all test files and directories exist"""
+    
+    base_dir = Path(__file__).parent
+    
+    required_files = [
+        "test_level1_commands.py",
+        "run_tests.py",
+        "README.md",
+        "utils/test_helpers.py", 
+        "utils/command_tester.py",
+        "fixtures/mock_config.py",
+        "fixtures/mock_responses.py",
+        "fixtures/test_wallets/test-wallet-1.json"
+    ]
+    
+    missing_files = []
+    
+    for file_path in required_files:
+        full_path = base_dir / file_path
+        if not full_path.exists():
+            missing_files.append(str(file_path))
+        else:
+            print(f"✅ {file_path}")
+    
+    if missing_files:
+        print(f"\n❌ Missing files: {len(missing_files)}")
+        for file in missing_files:
+            print(f"  - {file}")
+        return False
+    else:
+        print(f"\n🎉 All {len(required_files)} required files present!")
+        return True
+
+def validate_imports():
+    """Validate that all imports work correctly"""
+    
+    try:
+        # Test main test script import
+        sys.path.insert(0, str(Path(__file__).parent.parent))
+        import test_level1_commands
+        print("✅ test_level1_commands.py imports successfully")
+        
+        # Test utilities import
+        from utils.test_helpers import TestEnvironment, MockConfig
+        print("✅ utils.test_helpers imports successfully")
+        
+        from utils.command_tester import CommandTester
+        print("✅ utils.command_tester imports successfully")
+        
+        # Test fixtures import
+        from fixtures.mock_config import MOCK_CONFIG_DATA
+        print("✅ fixtures.mock_config imports successfully")
+        
+        from fixtures.mock_responses import MockApiResponse
+        print("✅ fixtures.mock_responses imports successfully")
+        
+        return True
+        
+    except ImportError as e:
+        print(f"❌ Import error: {e}")
+        return False
+    except Exception as e:
+        print(f"❌ Unexpected error: {e}")
+        return False
+
+def main():
+    """Main validation function"""
+    print("🔍 Validating AITBC CLI Level 1 Test Structure")
+    print("=" * 50)
+    
+    structure_ok = validate_test_structure()
+    imports_ok = validate_imports()
+    
+    print("\n" + "=" * 50)
+    print("📊 VALIDATION RESULTS")
+    print("=" * 50)
+    
+    if structure_ok and imports_ok:
+        print("🎉 ALL VALIDATIONS PASSED!")
+        print("The CLI Level 1 test suite is ready to run.")
+        return True
+    else:
+        print("❌ SOME VALIDATIONS FAILED!")
+        print("Please fix the issues before running the tests.")
+        return False
+
+if __name__ == "__main__":
+    success = main()
+    sys.exit(0 if success else 1)