server: game API modules — market, missions, players, inventory, leaderboard, cities, events

Add routes and services for all game domains: market buy/sell with
dynamic pricing, mission generation and completion, player stats and
travel, inventory queries, leaderboard, city list, and world events.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/src/modules/market/pricing.ts

@@ -0,0 +1,29 @@
+import { balance } from '../../config/gameBalance.js';
+import { clamp } from '../../shared/validators.js';
+
+/**
+ * Formula del mercato dinamico (blueprint §9):
+ *   rawPrice = basePrice * economyModifier * demand / max(supply, minSupplyDivisor) * eventModifier
+ * con rawPrice limitato a [basePrice*minPriceFactor, basePrice*maxPriceFactor].
+ */
+export function computePrices(
+  basePrice: number,
+  economyModifier: number,
+  demand: number,
+  supply: number,
+  eventModifier: number,
+): { buyPrice: number; sellPrice: number } {
+  const m = balance.market;
+  const raw =
+    basePrice * economyModifier * (demand / Math.max(supply, m.minSupplyDivisor)) * eventModifier;
+  const clamped = clamp(raw, basePrice * m.minPriceFactor, basePrice * m.maxPriceFactor);
+  return {
+    buyPrice: Math.round(clamped * m.buyMargin),
+    sellPrice: Math.round(clamped * m.sellMargin),
+  };
+}
+
+/** Mantiene demand/supply nei limiti consentiti. */
+export function clampDemandSupply(value: number): number {
+  return clamp(value, balance.market.minDemandSupply, balance.market.maxDemandSupply);
+}