test: add conftest with ComfyUI module stubs

tests/conftest.py

@@ -0,0 +1,12 @@
+# tests/conftest.py
+import sys
+import os
+from unittest.mock import MagicMock
+
+# Put the project root on sys.path so tests can import tracker, mapper directly
+sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
+
+# Stub ComfyUI-only modules before any test file imports project code
+for mod in ("folder_paths", "nodes", "server", "folder_paths.folder_names_and_paths"):
+    if mod not in sys.modules:
+        sys.modules[mod] = MagicMock()