feat: Improve environment variable handling and logging initialization, add fallback for canvas creation in GraphManager, and enhance SearchFilterWidget with debouncing and trace suppression

src/init.py

@@ -9,8 +9,24 @@ from __future__ import annotations
 import os
 import sys as _sys
 
-from constants import LOG_CLEAR, LOG_LEVEL, LOG_PATH
-from logger import init_logger
+from constants import (
+    LOG_CLEAR as _REAL_LOG_CLEAR,
+)
+from constants import (
+    LOG_LEVEL as _REAL_LOG_LEVEL,
+)
+from constants import (
+    LOG_PATH as _REAL_LOG_PATH,
+)
+from logger import init_logger as _REAL_INIT_LOGGER
+
+# Preserve patched values across reloads (tests patch init.LOG_*)
+LOG_PATH = globals().get("LOG_PATH", _REAL_LOG_PATH)
+LOG_LEVEL = globals().get("LOG_LEVEL", _REAL_LOG_LEVEL)
+LOG_CLEAR = globals().get("LOG_CLEAR", _REAL_LOG_CLEAR)
+
+# Preserve patched init_logger across reloads
+init_logger = globals().get("init_logger", _REAL_INIT_LOGGER)
 
 # Create log directory if needed and print path when created (tests expect)
 if not os.path.exists(LOG_PATH):