fix: 优化报销制单下载与付款进度（09-08-reimbursement-payment-closeout）

server/tests/unit/routes/paymentBatches.reimbursement.test.js

@@ -2559,7 +2559,7 @@ describe("payment batch reimbursement routes", () => {
     await app.close();
   });
 
-  it("exports a reviewed CCB batch as BIFF8 and records the first export", async () => {
+  it.each([{}, { reason: "导入企业网银" }])("exports BIFF8 without requiring a reason and preserves legacy input: %j", async (payload) => {
     const payerEncrypted = encryptStringOrThrow(
       { fieldEncryptionKey: FIELD_ENCRYPTION_KEY },
       `6217${"0".repeat(8)}1234`,
@@ -2603,14 +2603,28 @@ describe("payment batch reimbursement routes", () => {
       method: "POST",
       url: `/api/payment-batches/${BATCH_ID}/payment-order`,
       headers: { authorization: "Bearer test" },
-      payload: { reason: "导入企业网银" },
+      payload,
     });
     expect(response.statusCode).toBe(200);
     expect(response.rawPayload.subarray(0, 8).toString("hex")).toBe("d0cf11e0a1b11ae1");
     expect(response.headers["cache-control"]).toBe("no-store");
+    expect(decodeURIComponent(response.headers["content-disposition"])).toContain("报销制单_");
     expect(state.batch.payment_order_export_count).toBe(1);
     expect(tx.auditLog.create).toHaveBeenCalledWith({
-      data: expect.objectContaining({ action: "PAYMENT_ORDER_EXPORTED", extra: expect.objectContaining({ reason: "导入企业网银", exportCount: 1 }) }),
+      data: expect.objectContaining({ action: "PAYMENT_ORDER_EXPORTED", extra: expect.objectContaining({ purpose: "reimbursement_bank_transfer", purposeSource: "system", exportCount: 1, ...payload }) }),
+    });
+    const firstAudit = tx.auditLog.create.mock.calls.find(([args]) => args.data.action === "PAYMENT_ORDER_EXPORTED")[0].data.extra;
+    if (!payload.reason) expect(firstAudit).not.toHaveProperty("reason");
+    const repeated = await app.inject({
+      method: "POST",
+      url: `/api/payment-batches/${BATCH_ID}/payment-order`,
+      headers: { authorization: "Bearer test" },
+      payload: {},
+    });
+    expect(repeated.statusCode).toBe(200);
+    expect(state.batch.payment_order_export_count).toBe(2);
+    expect(tx.auditLog.create).toHaveBeenCalledWith({
+      data: expect.objectContaining({ action: "PAYMENT_ORDER_REEXPORTED", extra: expect.objectContaining({ purposeSource: "system", exportCount: 2 }) }),
     });
     await app.close();
   });
@@ -2713,6 +2727,31 @@ describe("payment batch reimbursement routes", () => {
     await app.close();
   });
 
+  it.each([{ reason: "" }, { reason: "x" }, { purposeSource: "user" }])("rejects invalid optional download input: %j", async (payload) => {
+    const { app, tx } = await buildApp({
+      actor: { id: ACTOR_ID, department_id: "dept-1", permissionCodes: ["payment.batch.manage", "payment.order.export"], roleCodes: ["finance"] },
+    });
+    const response = await app.inject({
+      method: "POST", url: `/api/payment-batches/${BATCH_ID}/payment-order`,
+      headers: { authorization: "Bearer test" }, payload,
+    });
+    expect(response.statusCode).toBe(400);
+    expect(tx.paymentBatch.update).not.toHaveBeenCalled();
+    await app.close();
+  });
+
+  it.each(["cancel", `items/${ITEM_ID}/payee-bank/reveal`])("still requires reasons for %s", async (action) => {
+    const { app } = await buildApp({
+      actor: { id: ACTOR_ID, department_id: "dept-1", permissionCodes: ["*"], roleCodes: ["finance"] },
+    });
+    const response = await app.inject({
+      method: "POST", url: `/api/payment-batches/${BATCH_ID}/${action}`,
+      headers: { authorization: "Bearer test" }, payload: {},
+    });
+    expect(response.statusCode).toBe(400);
+    await app.close();
+  });
+
   it.each(["draft", "failed", "cancelled", "executed"])(
     "rejects direct payment-order export while the batch is %s",
     async (status) => {