feat(phase1): add photo fields to Item model

backend/models.py

@@ -50,10 +50,15 @@ class Item(Base):
     quantity = Column(Float, default=0.0)
     min_quantity = Column(Float, default=1.0)
     image_url = Column(String, nullable=True)
-    
+
+    # Photo fields for item onboarding
+    photo_path = Column(String, nullable=True)
+    photo_thumbnail_path = Column(String, nullable=True)
+    photo_upload_date = Column(DateTime, nullable=True)
+
     # Generic box/container association for multi-item OCR scanning
     box_label = Column(String, index=True, nullable=True)
-    
+
     # Full AI metadata
     labels_data = Column(Text, nullable=True)  
 

backend/tests/test_schema.py

@@ -0,0 +1,81 @@
+import pytest
+from datetime import datetime
+from backend.models import Item
+
+
+class TestItemPhotoFields:
+    """Test photo fields in Item model."""
+
+    def test_item_has_photo_fields(self, test_db):
+        """Test that Item model has three photo fields."""
+        from backend.models import Item
+        from sqlalchemy import inspect
+
+        mapper = inspect(Item)
+        column_names = [c.name for c in mapper.columns]
+
+        assert "photo_path" in column_names
+        assert "photo_thumbnail_path" in column_names
+        assert "photo_upload_date" in column_names
+
+    def test_photo_fields_are_nullable(self, test_db):
+        """Test that photo fields are nullable and can create item without them."""
+        item = Item(
+            name="Test Item",
+            category="Electronics",
+            type="Component",
+            quantity=5,
+            barcode="PHOTO-001",
+            part_number="PN-001"
+        )
+        test_db.add(item)
+        test_db.commit()
+
+        retrieved = test_db.query(Item).filter_by(id=item.id).first()
+        assert retrieved.photo_path is None
+        assert retrieved.photo_thumbnail_path is None
+        assert retrieved.photo_upload_date is None
+
+    def test_photo_fields_can_store_values(self, test_db):
+        """Test that photo fields can store string and datetime values."""
+        upload_date = datetime(2026, 4, 20, 12, 30, 45)
+
+        item = Item(
+            name="Test Item",
+            category="Electronics",
+            type="Component",
+            quantity=5,
+            barcode="PHOTO-002",
+            part_number="PN-002",
+            photo_path="/images/items/photo-001.jpg",
+            photo_thumbnail_path="/images/items/thumbs/photo-001.jpg",
+            photo_upload_date=upload_date
+        )
+        test_db.add(item)
+        test_db.commit()
+
+        retrieved = test_db.query(Item).filter_by(id=item.id).first()
+        assert retrieved.photo_path == "/images/items/photo-001.jpg"
+        assert retrieved.photo_thumbnail_path == "/images/items/thumbs/photo-001.jpg"
+        assert retrieved.photo_upload_date == upload_date
+
+    def test_photo_fields_partial_null(self, test_db):
+        """Test that only some photo fields can be set, others null."""
+        item = Item(
+            name="Test Item",
+            category="Electronics",
+            type="Component",
+            quantity=5,
+            barcode="PHOTO-003",
+            part_number="PN-003",
+            photo_path="/images/items/photo-003.jpg",
+            photo_thumbnail_path=None,
+            photo_upload_date=None
+        )
+        test_db.add(item)
+        test_db.commit()
+
+        retrieved = test_db.query(Item).filter_by(id=item.id).first()
+        assert retrieved.photo_path == "/images/items/photo-003.jpg"
+        assert retrieved.photo_thumbnail_path is None
+        assert retrieved.photo_upload_date is None