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

utils/__tests__/weight.test.ts

@@ -25,8 +25,9 @@ describe('getTargetWeightForAge', () => {
     expect(getTargetWeightForAge(7, 60)).toBe(row.values[6]);
   });
 
-  it('returns null for ages outside 1..35', () => {
-    expect(getTargetWeightForAge(0, 42)).toBeNull();
+  it('returns docWeight for age 0 and null for ages outside 0..35', () => {
+    expect(getTargetWeightForAge(0, 42)).toBe(42);
+    expect(getTargetWeightForAge(-1, 42)).toBeNull();
     expect(getTargetWeightForAge(36, 42)).toBeNull();
   });
 });
@@ -37,7 +38,15 @@ describe('getTargetGainForAge', () => {
     expect(getTargetGainForAge(2, 40)).toBe(row.values[1]! - row.values[0]!);
   });
 
-  it('returns null for age 1', () => {
-    expect(getTargetGainForAge(1, 40)).toBeNull();
+  it('calculates target gain for age 1 relative to docWeight', () => {
+    const row = rowForDoc(40);
+    expect(getTargetGainForAge(1, 40)).toBe(row.values[0]! - 40);
+  });
+
+  it('returns null for ages outside 1..35 or invalid docWeight', () => {
+    expect(getTargetGainForAge(0, 40)).toBeNull();
+    expect(getTargetGainForAge(36, 40)).toBeNull();
+    expect(getTargetGainForAge(1, 0)).toBeNull();
+    expect(getTargetGainForAge(1, -5)).toBeNull();
   });
 });