feat(client): 行政代提交/代上传 owner 选择入口(F33)

- 报销创建支持选择 ownerEmployeeId（delegation-grants received）
- 票据上传支持 owner_employee_id（delegation-grants received）
- 保持普通员工流程不变，权限不足由后端阻断

client/src/api/delegations.ts

@@ -12,6 +12,22 @@ export type DelegationItem = {
   revokedAt: string | null;
   createdAt: string;
   status: DelegationStatus;
+  principal?: {
+    id: string;
+    employeeNo: string;
+    name: string;
+    departmentId: string;
+    status: string;
+    roleCodes: string[];
+  } | null;
+  delegate?: {
+    id: string;
+    employeeNo: string;
+    name: string;
+    departmentId: string;
+    status: string;
+    roleCodes: string[];
+  } | null;
 };
 
 export type CreateDelegationRequest = {
@@ -56,4 +72,3 @@ export async function revokeDelegation(delegationId: string) {
     },
   );
 }
-