Use YIELD enum reference and hide zero-default precision in setpoints

Replaces the hardcoded 3 in ReactionCard with
reaction_pb.ProductMeasurement.ProductMeasurementType.YIELD so a schema
renumber would fail at compile time. Skips the "± 0" suffix in
tempSetPoint and pressureSetPoint when precision is the proto3
zero-default.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: skearnes

app/src/components/ReactionCard.tsx

@@ -32,7 +32,7 @@ interface ReactionCardProps {
   onSelectionChange?: (reactionId: string, isSelected: boolean) => void;
 }
 
-const YIELD_MEASUREMENT_TYPE = 3; // ord-schema ProductMeasurementType.YIELD
+const YIELD_MEASUREMENT_TYPE = reaction_pb.ProductMeasurement.ProductMeasurementType.YIELD;
 
 const ReactionCard: React.FC<ReactionCardProps> = ({
   reaction,

app/src/utils/conditions.ts

@@ -33,7 +33,8 @@ export const tempType = (type: number | undefined): string =>
 export const tempSetPoint = (setpoint: Temperature.AsObject | undefined): string => {
   if (!setpoint) return 'None';
   const unit = enumName(reaction_pb.Temperature.TemperatureUnit, setpoint.units);
-  return `${setpoint.value} (± ${setpoint.precision}) °${unit ? unit.charAt(0) : ''}`;
+  const precision = setpoint.precision ? ` (± ${setpoint.precision})` : '';
+  return `${setpoint.value}${precision} °${unit ? unit.charAt(0) : ''}`;
 };
 
 export const pressureType = (type: number | undefined): string =>
@@ -42,7 +43,8 @@ export const pressureType = (type: number | undefined): string =>
 export const pressureSetPoint = (setpoint: Pressure.AsObject | undefined): string => {
   if (!setpoint) return 'None';
   const unit = enumName(reaction_pb.Pressure.PressureUnit, setpoint.units);
-  return `${setpoint.value} (± ${setpoint.precision}) ${unit ? unit.toLowerCase() : ''}`;
+  const precision = setpoint.precision ? ` (± ${setpoint.precision})` : '';
+  return `${setpoint.value}${precision} ${unit ? unit.toLowerCase() : ''}`;
 };
 
 export const pressureAtmo = (atmo: PressureConditions.Atmosphere.AsObject | undefined): string => {