增加铁路OCR金额字段安全诊断（07-28-travel-reimbursement-guide）

server/tests/unit/services/ocr.tencent.test.js

@@ -139,12 +139,66 @@ describe("Tencent general invoice OCR", () => {
       totalAmount: "553.00",
       sellerName: null,
       buyerName: "合成公司",
+      diagnostics: {
+        trainAmountFields: {
+          total: {
+            present: true,
+            isString: true,
+            isNumber: false,
+            nonEmpty: true,
+            parseable: true,
+          },
+          fare: {
+            present: false,
+            isString: false,
+            isNumber: false,
+            nonEmpty: false,
+            parseable: false,
+          },
+        },
+      },
     });
     expect(buildMissingRequiredOcrError("vat", normalized)).toBeNull();
     expect(shouldDeduplicateByInvoiceNumberOnly(normalized)).toBe(true);
     expect(JSON.stringify(normalized)).not.toContain("SENSITIVE-");
   });
 
+  it("reports only boolean railway amount field diagnostics", () => {
+    const normalized = normalizeGeneralInvoiceResult({
+      MixedInvoiceItems: [
+        buildInvoiceItem("ElectronicTrainTicketFull", "ElectronicTrainTicketFull", {
+          Number: "251234",
+          Date: "2026-07-26",
+          Fare: "not-a-number-sensitive-marker",
+          Buyer: "合成公司",
+        }),
+      ],
+    });
+
+    expect(normalized.diagnostics).toEqual({
+      trainAmountFields: {
+        total: {
+          present: false,
+          isString: false,
+          isNumber: false,
+          nonEmpty: false,
+          parseable: false,
+        },
+        fare: {
+          present: true,
+          isString: true,
+          isNumber: false,
+          nonEmpty: true,
+          parseable: false,
+        },
+      },
+    });
+    expect(JSON.stringify(normalized.diagnostics)).not.toContain("sensitive-marker");
+    expect(sanitizeOcrResultForPersistence("tencent", normalized)).not.toHaveProperty(
+      "diagnostics",
+    );
+  });
+
   it("returns safe terminal quality results for zero, multiple and unsupported invoices", () => {
     expect(normalizeGeneralInvoiceResult({ MixedInvoiceItems: [] })).toEqual(
       expect.objectContaining({ qualityError: "invoice_not_detected", documentCount: 0 }),