fix day 1 target weight bug and chicken counting row not showed before publish cutoff

utils/weight.ts

@@ -70,7 +70,12 @@ export function getTargetWeightForAge(age: number, docWeight: number): number |
 /** Target daily weight gain (grams/day) for a given age from the standard. */
 export function getTargetGainForAge(age: number, docWeight: number): number | null {
   const values = pickStandardValues(docWeight);
-  if (age < 2 || age > values.length) return null;
+  if (age < 1 || age > values.length) return null;
+  if (age === 1) {
+    const current = values[0];
+    if (current == null || docWeight <= 0) return null;
+    return current - docWeight;
+  }
   const current = values[age - 1];
   const previous = values[age - 2];
   if (current == null || previous == null) return null;