fix(t234): log OCR result in diagnostics

backend-api/internal/platform/shunyunbao/session.go

@@ -154,9 +154,16 @@ func (manager *SessionManager) EnsureAuthenticated(ctx context.Context) error {
 		return domain.ErrFreightSourceProtocol
 	}
 	code, err := manager.recognizer.Recognize(ctx, image.Content, image.ContentType)
-	if err != nil || !validCaptchaCode(code) {
+	if err != nil {
+		manager.logOCRResultFailed()
 		return domain.ErrFreightSourceOCRInvalid
 	}
+	code = strings.TrimSpace(code)
+	if !validCaptchaCode(code) {
+		manager.logOCRResultInvalid()
+		return domain.ErrFreightSourceOCRInvalid
+	}
+	manager.logOCRResult(code)
 	_, err = manager.Login(ctx, status.CaptchaTicket, code)
 	if errors.Is(err, ErrLoginRejected) {
 		return domain.ErrFreightSourceLoginRejected
@@ -479,6 +486,30 @@ func (manager *SessionManager) logERPTransportFailure(request *http.Request) {
 	)
 }
 
+func (manager *SessionManager) logOCRResult(value string) {
+	if !manager.diagnosticsOn {
+		return
+	}
+	manager.diagnosticLog(
+		"erp_ocr_result value=" + strconv.Quote(value) +
+			" length=" + strconv.Itoa(len(value)),
+	)
+}
+
+func (manager *SessionManager) logOCRResultInvalid() {
+	if !manager.diagnosticsOn {
+		return
+	}
+	manager.diagnosticLog("erp_ocr_result class=invalid")
+}
+
+func (manager *SessionManager) logOCRResultFailed() {
+	if !manager.diagnosticsOn {
+		return
+	}
+	manager.diagnosticLog("erp_ocr_result class=failed")
+}
+
 func (manager *SessionManager) logERPResponsePreview(
 	request *http.Request,
 	response *http.Response,