feat(gameplay): Adding % bonus for planet type

public/src/economy.js

@@ -1,4 +1,4 @@
-import { resources } from "./planetEconomy.js";
+import { resources, elements } from "./planetEconomy.js";
 
 // ── Sort state ────────────────────────────────────────────────────────────────
 
@@ -64,6 +64,46 @@ export function computeTeamIncome(team, cells, resourceWorth) {
   return { total, byResource };
 }
 
+// ── Element bonus calculation ─────────────────────────────────────────────────
+
+/**
+ * Reverse map: French element label → config key
+ * e.g. "Matières premières" → "common", "Hydrocarbures" → "petrol"
+ */
+const ELEMENT_LABEL_TO_KEY = Object.fromEntries(
+  Object.entries(elements).map(([key, label]) => [label, key])
+);
+
+/**
+ * Compute cumulative element bonus for a team based on their planets' production.
+ * planet.production stores French label strings as keys (values from elements const).
+ * bonus = sum_over_planets( sum_over_elements( elementShare% / 100 * elementWorth[key] ) )
+ *
+ * @param {string} team
+ * @param {Map<string, { discoveredBy: string, hasPlanet: boolean, planet: object|null }>} cells
+ * @param {object} elementWorth - { common: 1, petrol: 3, ... }
+ * @returns {number} bonus value (use as %)
+ */
+export function computeTeamElementBonus(team, cells, elementWorth) {
+  let bonus = 0;
+  for (const [, meta] of cells) {
+    if (meta.discoveredBy !== team) continue;
+    if (!meta.hasPlanet || !meta.planet) continue;
+    const { production } = meta.planet;
+    if (!production) continue;
+    for (const [elementLabel, pct] of Object.entries(production)) {
+      // production keys are French labels; map back to config key
+      const elementKey = ELEMENT_LABEL_TO_KEY[elementLabel] ?? elementLabel;
+      const worth = elementWorth?.[elementKey] ?? 0;
+      if (worth === 0) continue;
+      bonus += (pct / 100) * worth;
+    }
+  }
+  return bonus;
+}
+
+export { elements };
+
 // ── Resource table for the sidebar ───────────────────────────────────────────
 
 /**