fix: get_*_discount_items accept only request (Jinja2 call pattern)

Jinja2 templates call ServerEnv functions with (request) not (request, params_kw).
params_kw extracted from request._run_ns.params_kw instead.

supplychain/init.py

@@ -943,8 +943,9 @@ async def delete_product_supplier_mapping(request, params_kw):
         return json.dumps({"status": "ok", "message": "删除成功"})
 
 
-async def get_agreement_discount_items(request, params_kw):
+async def get_agreement_discount_items(request):
     """Return products with discount status for a distribution agreement."""
+    params_kw = getattr(request._run_ns, 'params_kw', {}) or {}
     agreement_id = params_kw.get('agreement_id') or params_kw.get('id')
     if not agreement_id:
         return []
@@ -973,6 +974,36 @@ async def get_agreement_discount_items(request, params_kw):
     return result
 
 
+async def get_contract_discount_items(request):
+    """Return products with discount status for a supply contract."""
+    params_kw = getattr(request._run_ns, 'params_kw', {}) or {}
+    contract_id = params_kw.get('contract_id') or params_kw.get('id')
+    if not contract_id:
+        return []
+    userorgid = getattr(ServerEnv(), 'orgid', None) or '0'
+    result = []
+    async with DBPools().sqlorContext('sage') as sor:
+        rows = await sor.sqlExe(
+            """SELECT p.id as productid, p.product_name, p.product_code, p.price as sale_price,
+                      pc.id as category_id, pc.name as category_name,
+                      sci.id as item_id, sci.discount
+               FROM product p
+               LEFT JOIN product_category pc ON p.category_id = pc.id
+               LEFT JOIN supplychain.supply_contract_items sci ON sci.productid = p.id AND sci.contract_id = ${cid}$
+               WHERE p.status = '1' AND p.org_id = ${oid}$
+               ORDER BY pc.sort_order, pc.name, p.sort_order, p.product_name""",
+            {'cid': contract_id, 'oid': userorgid}
+        )
+        for r in rows:
+            result.append({
+                'productid': r.productid, 'product_name': r.product_name,
+                'product_code': r.product_code, 'sale_price': str(r.sale_price) if r.sale_price else '',
+                'category_id': r.category_id or '', 'category_name': r.category_name or '',
+                'item_id': r.item_id or '', 'discount': str(r.discount) if r.discount else '1.0',
+            })
+    return result
+
+
 # ============================================================
 # Register functions with ServerEnv
 # ============================================================