refactor: the user setting and change to be cateogry based

src/common/transformers/decimal.transformer.ts

@@ -12,11 +12,11 @@ export class DecimalTransformer implements ValueTransformer {
   // }
 
   to(value: Decimal | null): string | null {
-    return value ? value.toString() : "0"; // Ensure it's always a valid number
+    return value ? value.toString() : "0";
   }
 
   from(value: string | null): number {
-    return value ? new Decimal(value).toNumber() : new Decimal(0).toNumber(); // Default to 0 if null
+    return value ? new Decimal(value).toNumber() : new Decimal(0).toNumber();
   }
 }