Initial commit: mini-erp (backend FastAPI + frontend React/Vite)

Base para el flujo de ramas por cliente.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

mini-backend/routers/catalogs.py

@@ -0,0 +1,79 @@
+from fastapi import APIRouter
+from core.sap import forward_to_sapb1
+from core.crud_router import make_crud_router
+
+
+router = APIRouter(
+    tags=["Catálogos"]
+)
+
+for _resource in ("Warehouses", "SalesTaxCodes", "FactoringIndicators"):
+    router.include_router(
+        make_crud_router(
+            _resource,
+            tags=["Catálogos"],
+            supports_get_by_key=False,
+            supports_create=False,
+            supports_patch=False,
+        )
+    )
+
+
+@router.get("/api/Currencies")
+async def get_currencies():
+    return forward_to_sapb1(
+        method="GET",
+        endpoint_path="Currencies",
+        params={"$select": "Code,Name", "$top": 200}
+    ).json()
+
+
+@router.get("/api/BusinessPartnerGroups")
+async def get_business_partner_groups():
+    return forward_to_sapb1(
+        method="GET",
+        endpoint_path="BusinessPartnerGroups",
+        params={"$select": "Number,GroupName"}
+    ).json()
+
+
+@router.get("/api/Sunat/BusinessPartners/DocumentType")
+async def get_sunat_businesspartners_document_type():
+
+    sap_params = {
+            "$skip": 0,
+            "$top": 200,
+            "$inlinecount": "allpages"
+        }
+
+    sap_params["$filter"] = "TableName eq 'OCRD' and Name eq 'EXX_TIPODOCU'"
+    
+
+    base_headers = {"B1S-PageSize": "200"}
+
+    return forward_to_sapb1(
+            method="GET",
+            endpoint_path="UserFieldsMD",
+            params=sap_params,
+            extra_headers=base_headers
+        ).json()
+
+@router.get("/api/ItemGroups")
+async def get_item_groups():
+
+    sap_params = {
+            "$skip": 0,
+            "$top": 200,
+            "$inlinecount": "allpages"
+        }
+    sap_params["$select"] = "Number,GroupName"
+    
+    base_headers = {"B1S-PageSize": "200"}
+
+    return forward_to_sapb1(
+            method="GET",
+            endpoint_path="ItemGroups",
+            params=sap_params,
+            extra_headers=base_headers
+        ).json()
+#