fix(back-end): noozle diameter

backend/src/main/java/com/printcalculator/service/OrcaProfileResolver.java

@@ -100,11 +100,11 @@ public class OrcaProfileResolver {
 
         String displayName = machine.getPrinterDisplayName();
         if (displayName.toLowerCase().contains("bambulab a1") || displayName.toLowerCase().contains("bambu lab a1")) {
-            BigDecimal normalizedNozzle = normalizeNozzle(nozzleDiameterMm);
-            if (normalizedNozzle == null) {
+            String nozzleForProfile = formatNozzleForProfileName(nozzleDiameterMm);
+            if (nozzleForProfile == null) {
                 return "Bambu Lab A1 0.4 nozzle";
             }
-            return "Bambu Lab A1 " + normalizedNozzle.toPlainString() + " nozzle";
+            return "Bambu Lab A1 " + nozzleForProfile + " nozzle";
         }
 
         return displayName;
@@ -131,6 +131,18 @@ public class OrcaProfileResolver {
         return nozzleDiameterMm.setScale(2, RoundingMode.HALF_UP);
     }
 
+    private String formatNozzleForProfileName(BigDecimal nozzleDiameterMm) {
+        BigDecimal normalizedNozzle = normalizeNozzle(nozzleDiameterMm);
+        if (normalizedNozzle == null) {
+            return null;
+        }
+        BigDecimal stripped = normalizedNozzle.stripTrailingZeros();
+        if (stripped.scale() < 0) {
+            stripped = stripped.setScale(0);
+        }
+        return stripped.toPlainString();
+    }
+
     public record ResolvedProfiles(
             String machineProfileName,
             String filamentProfileName,