feat: Add currency and unit support across models, routes, and templates; enhance UI for consumption, costs, and production

tests/unit/test_production.py

@@ -25,6 +25,8 @@ def test_create_production_record(client: TestClient) -> None:
         "scenario_id": scenario_id,
         "amount": 475.25,
         "description": "Daily output",
+        "unit_name": "Tonnes",
+        "unit_symbol": "t",
     }
 
     response = client.post("/api/production/", json=payload)
@@ -33,6 +35,7 @@ def test_create_production_record(client: TestClient) -> None:
     assert created["scenario_id"] == scenario_id
     assert created["amount"] == pytest.approx(475.25)
     assert created["description"] == "Daily output"
+    assert created["unit_symbol"] == "t"
 
 
 def test_list_production_filters_by_scenario(client: TestClient) -> None:
@@ -46,6 +49,8 @@ def test_list_production_filters_by_scenario(client: TestClient) -> None:
                 "scenario_id": scenario_id,
                 "amount": amount,
                 "description": f"Output {amount}",
+                "unit_name": "Kilograms",
+                "unit_symbol": "kg",
             },
         )
         assert response.status_code == 201