修复报销票据门禁提示与 OCR 降级（08-30-b2-submit-error-ocr-fallback）

server/src/services/invoiceAmountEvidence.js

@@ -0,0 +1,32 @@
+const INVOICE_AMOUNT_EVIDENCE_STATUS = Object.freeze({
+  verified: "verified",
+  manualReview: "manual_review",
+  ocrFailed: "ocr_failed",
+});
+
+function resolveInvoiceAmountEvidence({
+  totalAmount,
+  ocrAttempts,
+  ocrLastRequestedAt,
+  ocrCompletedAt,
+  ocrLastError,
+}) {
+  if (totalAmount != null) {
+    return INVOICE_AMOUNT_EVIDENCE_STATUS.verified;
+  }
+
+  const hasOcrExecutionEvidence =
+    Number(ocrAttempts ?? 0) > 0 ||
+    ocrLastRequestedAt != null ||
+    ocrCompletedAt != null ||
+    (typeof ocrLastError === "string" && ocrLastError.trim().length > 0);
+
+  return hasOcrExecutionEvidence
+    ? INVOICE_AMOUNT_EVIDENCE_STATUS.ocrFailed
+    : INVOICE_AMOUNT_EVIDENCE_STATUS.manualReview;
+}
+
+module.exports = {
+  INVOICE_AMOUNT_EVIDENCE_STATUS,
+  resolveInvoiceAmountEvidence,
+};