updated tests

tests/conftest.py

@@ -0,0 +1,14 @@
+"""Root conftest for all tests."""
+
+import os
+import tempfile
+import pytest
+
+
+def pytest_configure(config: pytest.Config) -> None:
+    """Configure pytest environment before any imports happen."""
+    # Set DATA_DIR before any modules are imported
+    if "DATA_DIR" not in os.environ:
+        tmpdir = tempfile.mkdtemp(prefix="baby_monitor_test_")
+        os.environ["DATA_DIR"] = tmpdir
+        os.environ["ENVIRONMENT"] = "development"