fix: Resolve failing tests after CLI and error handling refactoring

Fix all test failures introduced by recent architectural changes:

• Issue Creator Tests:
  - Fixed mock API responses to include required fields (created_at, updated_at, html_url)
  - Added input validation for empty titles back to issue creator
  - Updated test expectations to match new error handling patterns
  - Created helper function for complete mock responses

• Issue Fetcher Test:
  - Updated mock target from tddai.issue_fetcher.subprocess to gitea.http_client.subprocess
  - Fixed test assertions to match new error handling with specific exception chaining
  - Test now properly validates API error translation

• Makefile Integration Test:
  - Implemented lazy initialization in tddai_cli.py to prevent import-time configuration errors
  - Replaced eager CLI framework initialization with _get_cli() lazy pattern
  - Preserves normal CLI functionality while fixing test environment compatibility

• Result: All 171 tests now pass (169 passed, 2 skipped)
• Maintains backward compatibility of CLI interface
• Validates that refactored error handling works correctly

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

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

tests/test_issue_creator.py

@@ -25,6 +25,18 @@ class TestIssueCreator:
             repo_name="test_repo"
         )
 
+    def _get_complete_mock_response(self, number: int, title: str = "Test Issue", body: str = "Test description"):
+        """Get a complete mock API response with all required fields."""
+        return {
+            "number": number,
+            "title": title,
+            "body": body,
+            "state": "open",
+            "created_at": "2025-09-26T10:00:00Z",
+            "updated_at": "2025-09-26T10:00:00Z",
+            "html_url": f"http://gitea.example.com/repo/issues/{number}"
+        }
+
     def test_init_with_auth_token(self):
         """Test IssueCreator initialization with auth token."""
         config = self._get_test_config()
@@ -62,7 +74,10 @@ class TestIssueCreator:
             "number": 123,
             "title": "Test Issue",
             "body": "Test description",
-            "state": "open"
+            "state": "open",
+            "created_at": "2025-09-26T10:00:00Z",
+            "updated_at": "2025-09-26T10:00:00Z",
+            "html_url": "http://gitea.example.com/repo/issues/123"
         }
 
         mock_run.return_value = MagicMock(
@@ -73,7 +88,19 @@ class TestIssueCreator:
 
         result = creator.create_issue("Test Issue", "Test description")
 
-        assert result == mock_response
+        # Verify the result has the expected structure (transformed by issue creator)
+        expected_result = {
+            'number': 123,
+            'title': "Test Issue",
+            'body': "Test description",
+            'state': "open",
+            'html_url': "http://gitea.example.com/repo/issues/123",
+            'created_at': "2025-09-26T10:00:00",  # ISO format from datetime parsing
+            'updated_at': "2025-09-26T10:00:00",
+            'assignee': None,
+            'labels': []
+        }
+        assert result == expected_result
         mock_run.assert_called_once()
 
         # Check curl command structure
@@ -144,7 +171,7 @@ class TestIssueCreator:
             stderr=""
         )
 
-        with pytest.raises(IssueError, match="Failed to parse response data"):
+        with pytest.raises(IssueError, match="Failed to create issue.*parse.*response"):
             creator.create_issue("Test Issue", "Test description")
 
     @patch('subprocess.run')
@@ -153,7 +180,7 @@ class TestIssueCreator:
         config = self._get_test_config()
         creator = IssueCreator(config=config, auth_token="test-token")
 
-        mock_response = {"number": 124}
+        mock_response = self._get_complete_mock_response(124)
         mock_run.return_value = MagicMock(
             returncode=0,
             stdout=json.dumps(mock_response),
@@ -183,7 +210,7 @@ class TestIssueCreator:
         config = self._get_test_config()
         creator = IssueCreator(config=config, auth_token="test-token")
 
-        mock_response = {"number": 125}
+        mock_response = self._get_complete_mock_response(125)
         mock_run.return_value = MagicMock(
             returncode=0,
             stdout=json.dumps(mock_response),
@@ -218,7 +245,7 @@ class TestIssueCreator:
         config = self._get_test_config()
         creator = IssueCreator(config=config, auth_token="test-token")
 
-        mock_response = {"number": 126}
+        mock_response = self._get_complete_mock_response(126)
         mock_run.return_value = MagicMock(
             returncode=0,
             stdout=json.dumps(mock_response),
@@ -255,7 +282,7 @@ class TestIssueCreator:
         config = self._get_test_config()
         creator = IssueCreator(config=config, auth_token="test-token")
 
-        mock_response = {"number": 127}
+        mock_response = self._get_complete_mock_response(127)
         mock_run.return_value = MagicMock(
             returncode=0,
             stdout=json.dumps(mock_response),