Calibrate the soul layer: innocent harvests, sane gifts, healing path

Run 5 findings: justice arrived (selfish health 31-64 vs nature 100, all
108 refusals theirs) but two pathologies emerged: the whole village maxed
others-regard debris because the commons penalty line (50%) sat above the
nature harvest floor (45%) and debris had no clearing path; and warmth-
weighted asking + near-total gift transfers produced a 2,501-gift winter
food-swapping loop.

Fixes: commons line lowered to 40% (respectful harvesting never grazes
it; strip-harvesting lives deep inside it); gifts capped at 3 with a
kept reserve of 5; asking gated on genuine hunger; and giving now heals
the giver slightly (-0.003 others-regard vs +0.02 per refusal) — harm
stays an order of magnitude easier than healing.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/World.cs

@@ -88,7 +88,10 @@ public class World
         node.Amount -= taken;
         HarvestedToday += taken;
 
-        float commons = node.MaxAmount * 0.5f;
+        // The moral line sits below any respectful harvest floor (nature souls
+        // stop at 45%) — ordinary sustainable taking never grazes it, while
+        // strip-harvesting (selfish floor ~10%) lives deep inside it.
+        float commons = node.MaxAmount * 0.4f;
         if (node.Amount < commons)
         {
             float takenBelow = Math.Min(taken, commons - node.Amount);