fix: Update exception handling in GraphManager and improve logger initialization tests to avoid UnboundLocalError

tests/test_init.py

@@ -105,7 +105,9 @@ class TestInit:
                 f"{temp_log_dir}/thechart.error.log",
             )
 
-            assert src.init.log_files == expected_files
+            # Access the (re)loaded module directly from sys.modules to avoid
+            # UnboundLocalError when the conditional local import path isn't taken.
+            assert sys.modules['init'].log_files == expected_files
 
     def test_testing_mode_detection(self, temp_log_dir):
         """Test that testing mode is detected correctly."""
@@ -118,12 +120,14 @@ class TestInit:
                 else:
                     import src.init
 
-                assert src.init.testing_mode is True
+                # Access via sys.modules to avoid UnboundLocalError from conditional import
+                assert sys.modules['init'].testing_mode is True
 
             # Test with non-DEBUG level
             with patch('init.LOG_LEVEL', 'INFO'):
                 importlib.reload(sys.modules['init'])
-                assert src.init.testing_mode is False
+                # Access via sys.modules to avoid UnboundLocalError from conditional import
+                assert sys.modules['init'].testing_mode is False
 
     def test_log_clear_true(self, temp_log_dir):
         """Test log file clearing when LOG_CLEAR is True."""
@@ -237,9 +241,10 @@ class TestInit:
                 import src.init
 
             # Check that expected objects are available
-            assert hasattr(src.init, 'logger')
-            assert hasattr(src.init, 'log_files')
-            assert hasattr(src.init, 'testing_mode')
+            mod = sys.modules['init']
+            assert hasattr(mod, 'logger')
+            assert hasattr(mod, 'log_files')
+            assert hasattr(mod, 'testing_mode')
 
     def test_log_path_printing(self, temp_log_dir):
         """Test that LOG_PATH is printed when directory is created."""