fix: Resolve all 3 failing config CLI tests - complete test suite now passing

- Fix test_troubleshoot_config_failure: Add missing is_git_repository key to mock data
- Fix test_perform_validation_checks_invalid_gitea_url: Bypass constructor validation for testing invalid URLs
- Fix test_show_gitea_configuration: Mock filesystem operations to prevent real config interference
- Rename tests for better clarity in TDDAI/Gitea context
- Update NEXT.md: All 348 tests now passing, ready for next development phase

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

tests/test_config_cli_commands.py

@@ -172,7 +172,7 @@ class TestConfigCommands:
                 },
                 'filesystem': {},
                 'config_files': {},
-                'git_repository': {}
+                'git_repository': {'is_git_repository': False}
             }
 
             self.config_commands.troubleshoot_config()
@@ -241,14 +241,14 @@ class TestConfigCommands:
         error_results = [r for r in results if r['status'] == 'error']
         assert len(error_results) >= 2  # At least gitea_url and repo_owner
 
-    def test_perform_validation_checks_invalid_url(self):
-        """Test validation checks with invalid URL format."""
-        config = MarkitectConfig(
-            gitea_url="invalid-url",
-            repo_owner="test_owner",
-            repo_name="test_repo",
-            workspace_dir=Path(".test_workspace")
-        )
+    def test_perform_validation_checks_invalid_gitea_url(self):
+        """Test validation checks with invalid Gitea URL format."""
+        # Create a config that bypasses normal validation
+        config = MarkitectConfig.__new__(MarkitectConfig)
+        config.gitea_url = "invalid-url"
+        config.repo_owner = "test_owner"
+        config.repo_name = "test_repo"
+        config.workspace_dir = Path(".test_workspace")
 
         results = self.config_commands._perform_validation_checks(config)
 
@@ -401,8 +401,13 @@ class TestConfigPresenter:
         assert "❌ Test error message" in output
 
     @patch('sys.stdout', new_callable=StringIO)
-    def test_show_configuration(self, mock_stdout):
-        """Test configuration display."""
+    @patch('pathlib.Path.exists')
+    @patch('pathlib.Path.iterdir')
+    def test_show_gitea_configuration(self, mock_iterdir, mock_exists, mock_stdout):
+        """Test Gitea configuration display."""
+        mock_exists.return_value = False  # Don't check real filesystem
+        mock_iterdir.return_value = []
+
         config = MarkitectConfig(
             gitea_url="https://github.com",
             repo_owner="test_owner",