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

server/src/services/ocr/tencent.js

@@ -73,6 +73,20 @@ function toNumberString(value) {
   return num.toFixed(2);
 }
 
+function buildNumericFieldDiagnostics(value) {
+  const present = value != null;
+  const isString = typeof value === "string";
+  const isNumber = typeof value === "number" && Number.isFinite(value);
+
+  return {
+    present,
+    isString,
+    isNumber,
+    nonEmpty: isString ? value.trim().length > 0 : isNumber,
+    parseable: toNumberString(value) != null,
+  };
+}
+
 function addNumberStrings(...values) {
   const normalized = values.map((value) => toNumberString(value));
   if (normalized.some((value) => value == null)) {
@@ -221,6 +235,12 @@ function normalizeElectronicTrainTicket(info) {
     taxAmount,
     totalAmount,
     buyerName: normalizeString(info?.Buyer),
+    diagnostics: {
+      trainAmountFields: {
+        total: buildNumericFieldDiagnostics(info?.Total),
+        fare: buildNumericFieldDiagnostics(info?.Fare),
+      },
+    },
   };
 }