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

routes/costs.py

@@ -1,7 +1,7 @@
 from typing import List, Optional
 
 from fastapi import APIRouter, Depends
-from pydantic import BaseModel, ConfigDict
+from pydantic import BaseModel, ConfigDict, field_validator
 from sqlalchemy.orm import Session
 
 from models.capex import Capex
@@ -9,28 +9,36 @@ from models.opex import Opex
 from routes.dependencies import get_db
 
 router = APIRouter(prefix="/api/costs", tags=["Costs"])
-# Pydantic schemas for Capex
+# Pydantic schemas for CAPEX and OPEX
 
 
-class CapexCreate(BaseModel):
+class _CostBase(BaseModel):
     scenario_id: int
     amount: float
     description: Optional[str] = None
+    currency_code: str = "USD"
+
+    @field_validator("currency_code")
+    @classmethod
+    def _normalize_currency(cls, value: Optional[str]) -> str:
+        code = (value or "USD").strip().upper()
+        return code[:3] if len(code) > 3 else code
 
 
-class CapexRead(CapexCreate):
+class CapexCreate(_CostBase):
+    pass
+
+
+class CapexRead(_CostBase):
     id: int
     model_config = ConfigDict(from_attributes=True)
 
 
-# Pydantic schemas for Opex
-class OpexCreate(BaseModel):
-    scenario_id: int
-    amount: float
-    description: Optional[str] = None
+class OpexCreate(_CostBase):
+    pass
 
 
-class OpexRead(OpexCreate):
+class OpexRead(_CostBase):
     id: int
     model_config = ConfigDict(from_attributes=True)