feat(borrow,outbound): 库管(WAREHOUSE_MGR)代建申请强制审批

- submit/create 新增 force_approval：库管建单无视物料是否需审批，一律走审批
- 路由按当前角色为 WAREHOUSE_MGR 传 true；未选审批人返回明确业务错误

inventory-backend/app/services/borrow_service.py

@@ -62,7 +62,7 @@ class BorrowApprovalService:
 
     @staticmethod
     def submit_approval(applicant_id, items, allowed_approvers, remark=None, approver_id=None,
-                         borrower_name=None):
+                         borrower_name=None, force_approval=False):
         """
         提交借库申请（仅存储意向，不扣库存）
 
@@ -111,10 +111,14 @@ class BorrowApprovalService:
             except (TypeError, ValueError) as e:
                 raise ValueError(f"第 {idx + 1} 条物品的 quantity 格式无效: {str(e)}")
 
-        # ★ 需审批判定：明细含“出库/借库需审批”物料 → 走原审批流程；否则默认自动通过
+        # ★ 需审批判定：库管代建(force_approval)或明细含需审批物料 → 走审批；否则默认自动通过
         from app.services.approval_control import resolve_approval_control
         need_approval, flagged_materials = resolve_approval_control(items)
+        if force_approval:
+            need_approval = True
         if need_approval and not approver_id:
+            if force_approval:
+                raise ValueError("库管代建借库申请必须选择审批人后再提交")
             _names = "；".join(f"{m['name']}（{m['spec_model'] or '-'}）" for m in flagged_materials)
             raise ValueError(f"以下物料需审批出库/借库：{_names}。请选择审批人后再提交")