fix: 彻底解耦出库/借库权限联动 + 路由去硬编码roles + 补API权限保护

根因: 借库选单页面14处硬编码outbound_selection:operation, 导致两模块权限联动

修复:
- borrow/apply: 14处outbound_selection:operation→op_borrow_apply:operation
- stock.py: 拆分_do_get_stock_list裸逻辑, 出库/借库各绑独立权限码
- transactions: 新增/borrow/stock-list端点(@permission(op_borrow_apply))
- transaction.ts: 新增getBorrowStockList前端API函数
- outbound.py: 出库审批4端点改用独立outbound_approval权限码
- transactions.py: 借库审批3端点补@permission(op_borrow_approval)
- purchase.py: 采购管理7端点补@permission(inbound_buy)
- audit.py: 审计日志补@permission(system_audit)
- router: 清除全部6处硬编码roles, 交由动态权限树控制

inventory-backend/app/api/v1/outbound.py

@@ -234,7 +234,7 @@ def get_current_user_info():
 # --------------------------------------------------------
 @outbound_bp.route('/request', methods=['POST'])
 @jwt_required()
-@permission_required('outbound_list')
+@permission_required('outbound_approval')
 def create_outbound_request():
     """
     创建出库审批单（申请阶段，用户只需提交宏观物料信息，无需关联具体库存记录）
@@ -323,7 +323,7 @@ def create_outbound_request():
 # --------------------------------------------------------
 @outbound_bp.route('/request/<int:request_id>/approve', methods=['PATCH'])
 @jwt_required()
-@permission_required('outbound_list')
+@permission_required('outbound_approval')
 def approve_outbound_request(request_id):
     """
     审批出库申请
@@ -377,7 +377,7 @@ def approve_outbound_request(request_id):
 # --------------------------------------------------------
 @outbound_bp.route('/request', methods=['GET'])
 @jwt_required()
-@permission_required('outbound_list')
+@permission_required('outbound_approval')
 def get_outbound_request_list():
     """
     获取出库审批单列表
@@ -424,7 +424,7 @@ def get_outbound_request_list():
 # --------------------------------------------------------
 @outbound_bp.route('/request/<int:request_id>', methods=['GET'])
 @jwt_required()
-@permission_required('outbound_list')
+@permission_required('outbound_approval')
 def get_outbound_request_detail(request_id):
     """获取出库审批单详情"""
     try: