feat: Add dialog for creating and editing historical tariff fractions and implement deterministic sorting for fraction listings.

backend/api/v1/modules/a76/general_catalogs/fractions/canadian_tariff_fractions/service.py

@@ -36,6 +36,8 @@ class CanadianTariffFractionService:
             )
             
         total = self.db.execute(select(func.count()).select_from(query.subquery())).scalar_one()
+        # Add deterministic sort order
+        query = query.order_by(CanadianTariffFraction.fraction)
         items = self.db.scalars(query.offset(skip).limit(limit)).all()
         return items, total
 

backend/api/v1/modules/a76/general_catalogs/fractions/historical_tariff_fractions/service.py

@@ -33,6 +33,8 @@ class HistoricalTariffFractionService:
             query = query.where(HistoricalTariffFraction.historical_fraction.ilike(f"%{historical_fraction}%"))
             
         total = self.db.execute(select(func.count()).select_from(query.subquery())).scalar_one()
+        # Add deterministic sort order
+        query = query.order_by(HistoricalTariffFraction.historical_fraction)
         items = self.db.scalars(query.offset(skip).limit(limit)).all()
         return items, total
 

backend/api/v1/modules/a76/general_catalogs/fractions/tariff_fractions/service.py

@@ -291,6 +291,8 @@ class TariffFractionService:
                     query = query.filter(TariffFraction.umt.ilike(f"%{filters['umt']}%"))
 
         total = query.count()
+        # Add deterministic sort order
+        query = query.order_by(TariffFraction.fraction)
         items = query.offset(skip).limit(limit).all()
 
         return items, total

backend/api/v1/modules/public/reference_data/sectors/routes.py

@@ -32,6 +32,8 @@ def list_sectors(
         query = query.filter(search_filter)
         
     total = query.count()
+    # Add deterministic sort order
+    query = query.order_by(Sector.key)
     items = query.offset(skip).limit(page_size).all()
     
     return {

backend/api/v1/modules/sitar/common/base_service.py

@@ -86,6 +86,8 @@ class SitarAPIBaseService:
             httpx.HTTPError: If request fails
         """
         token = await self._get_token()
+        # Ensure no double slash between fractures and endpoint
+        endpoint = endpoint.lstrip("/")
         url = f"{self.base_url}/fractions/{endpoint}"
         headers = {
             "Authorization": f"Bearer {token}",