Add medicine management functionality with UI and data handling

- Implemented MedicineManagementWindow for adding, editing, and removing medicines.
- Created MedicineManager to handle medicine configurations, including loading and saving to JSON.
- Updated UIManager to dynamically generate medicine-related UI components based on the MedicineManager.
- Enhanced test suite with mock objects for MedicineManager to ensure proper functionality in DataManager tests.
- Added validation for medicine input fields in the UI.
- Introduced default medicine configurations for initial setup.

tests/conftest.py

@@ -8,6 +8,12 @@ import pandas as pd
 from unittest.mock import Mock
 import logging
 
+# Add src to path for imports
+import sys
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'src'))
+
+from src.medicine_manager import MedicineManager, Medicine
+
 
 @pytest.fixture
 def temp_csv_file():
@@ -20,6 +26,64 @@ def temp_csv_file():
         os.unlink(path)
 
 
+@pytest.fixture
+def mock_medicine_manager():
+    """Create a mock medicine manager with default medicines for testing."""
+    mock_manager = Mock(spec=MedicineManager)
+
+    # Default medicines matching the original system
+    default_medicines = {
+        "bupropion": Medicine(
+            key="bupropion",
+            display_name="Bupropion",
+            dosage_info="150/300 mg",
+            quick_doses=["150", "300"],
+            color="#FF6B6B",
+            default_enabled=True
+        ),
+        "hydroxyzine": Medicine(
+            key="hydroxyzine",
+            display_name="Hydroxyzine",
+            dosage_info="25 mg",
+            quick_doses=["25", "50"],
+            color="#4ECDC4",
+            default_enabled=False
+        ),
+        "gabapentin": Medicine(
+            key="gabapentin",
+            display_name="Gabapentin",
+            dosage_info="100 mg",
+            quick_doses=["100", "300", "600"],
+            color="#45B7D1",
+            default_enabled=False
+        ),
+        "propranolol": Medicine(
+            key="propranolol",
+            display_name="Propranolol",
+            dosage_info="10 mg",
+            quick_doses=["10", "20", "40"],
+            color="#96CEB4",
+            default_enabled=True
+        ),
+        "quetiapine": Medicine(
+            key="quetiapine",
+            display_name="Quetiapine",
+            dosage_info="25 mg",
+            quick_doses=["25", "50", "100"],
+            color="#FFEAA7",
+            default_enabled=False
+        )
+    }
+
+    mock_manager.get_medicine_keys.return_value = list(default_medicines.keys())
+    mock_manager.get_all_medicines.return_value = default_medicines
+    mock_manager.get_medicine.side_effect = lambda key: default_medicines.get(key)
+    mock_manager.get_graph_colors.return_value = {k: v.color for k, v in default_medicines.items()}
+    mock_manager.get_quick_doses.side_effect = lambda key: default_medicines.get(key, Medicine("", "", "", [], "", False)).quick_doses
+
+    return mock_manager
+
+
 @pytest.fixture
 def sample_data():
     """Sample data for testing."""