fix: Economy factors taken in charge in websockets

server/helpers/economy.js

@@ -70,6 +70,24 @@ const ELEMENT_LABEL_TO_KEY = Object.fromEntries(
 
 // ── Income computation ────────────────────────────────────────────────────────
 
+/**
+ * Population-based income multiplier (mirrors public/src/economy.js).
+ * Base factor = billions / 10, plus an efficiency boost for smaller populations:
+ *   0–10 B → ×10,  10–100 B → ×5,  100–1000 B → ×2.5,  >1000 B → ×1
+ *
+ * @param {number} billions
+ * @returns {number}
+ */
+function populationFactor(billions) {
+  const base = billions / 10;
+  let boost;
+  if (billions < 10)        boost = 10;
+  else if (billions < 100)  boost = 5;
+  else if (billions < 1000) boost = 2.5;
+  else                      boost = 1;
+  return base * boost;
+}
+
 /**
  * Compute total income per second for a team from DB grid rows.
  *
@@ -83,14 +101,15 @@ export function computeTeamIncome(team, rows, resourceWorth) {
   for (const row of rows) {
     if (row.discovered_by !== team) continue;
     if (!row.has_planet || !row.planet_json) continue;
-    const { naturalResources } = row.planet_json;
+    const { naturalResources, population } = row.planet_json;
     if (!naturalResources) continue;
+    const popFactor = population ? populationFactor(population.billions) : 1;
     for (const [label, pct] of Object.entries(naturalResources)) {
       const info = LABEL_TO_RESOURCE.get(label);
       if (!info) continue;
       const worth = resourceWorth?.[info.cat]?.[info.key] ?? 0;
       if (worth === 0) continue;
-      total += (pct / 100) * worth;
+      total += (pct / 100) * worth * popFactor;
     }
   }
   return total;