feat: implement Textual TUI and SQLite database for sensor management

tests/conftest.py

@@ -0,0 +1,15 @@
+import os
+import sys
+from unittest.mock import MagicMock
+
+# Mock environment variables required by config.py
+os.environ["MQTT_HOST"] = "localhost"
+os.environ["MQTT_PORT"] = "1883"
+os.environ["MQTT_USER"] = "user"
+os.environ["MQTT_PASSWORD"] = "password"
+
+# Mock bluetooth package globally for all tests
+mock_bluetooth = MagicMock()
+mock_bluez = MagicMock()
+sys.modules["bluetooth"] = mock_bluetooth
+sys.modules["bluetooth._bluetooth"] = mock_bluez