feat: gold/sec display with multipliers (#100) and peasant late-game upgrades (#101)

apps/api/src/data/quests.ts

@@ -183,6 +183,7 @@ export const defaultQuests: Array<Quest> = [
       { amount: 1500, type: "essence" },
       { amount: 75, type: "crystals" },
       { targetId: "knight_1", type: "upgrade" },
+      { targetId: "peasant_2", type: "upgrade" },
     ],
     status: "locked",
     zoneId: "shadow_marshes",
@@ -282,6 +283,7 @@ export const defaultQuests: Array<Quest> = [
       { amount: 40_000_000, type: "gold" },
       { amount: 12_000, type: "essence" },
       { amount: 300, type: "crystals" },
+      { targetId: "peasant_3", type: "upgrade" },
     ],
     status: "locked",
     zoneId: "volcanic_depths",

apps/api/src/data/upgrades.ts

@@ -162,6 +162,34 @@ export const defaultUpgrades: Array<Upgrade> = [
     target:       "adventurer",
     unlocked:     false,
   },
+  {
+    adventurerId: "peasant",
+    costCrystals: 0,
+    costEssence:  20,
+    costGold:     0,
+    description:
+      "Organised labour guilds and proper scheduling make peasants ten times more productive.",
+    id:         "peasant_2",
+    multiplier: 10,
+    name:       "Guild Organisation",
+    purchased:  false,
+    target:     "adventurer",
+    unlocked:   false,
+  },
+  {
+    adventurerId: "peasant",
+    costCrystals: 50,
+    costEssence:  0,
+    costGold:     0,
+    description:
+      "Magical augmentation through crystalline resonance supercharges even the humblest worker.",
+    id:         "peasant_3",
+    multiplier: 50,
+    name:       "Crystal Augmentation",
+    purchased:  false,
+    target:     "adventurer",
+    unlocked:   false,
+  },
   {
     adventurerId: "militia",
     costCrystals: 0,

apps/web/src/components/ui/resourceBar.tsx

@@ -7,7 +7,7 @@
 /* eslint-disable max-lines-per-function -- Large header with many resource and action elements */
 /* eslint-disable complexity -- Many conditional resource and badge render paths */
 import { useGame } from "../../context/gameContext.js";
-import { RESOURCE_CAP } from "../../engine/tick.js";
+import { RESOURCE_CAP, computeGoldPerSecond } from "../../engine/tick.js";
 import type { Resource } from "@elysium/types";
 import type { JSX } from "react";
 
@@ -80,11 +80,13 @@ const ResourceBar = ({
   const { formatNumber, syncError, state } = useGame();
   const { gold, essence, crystals } = resources;
   let partyCombatPower = 0;
+  let goldPerSecond = 0;
   if (state !== null) {
     for (const adventurer of state.adventurers) {
       const contribution = adventurer.combatPower * adventurer.count;
       partyCombatPower = partyCombatPower + contribution;
     }
+    goldPerSecond = computeGoldPerSecond(state);
   }
   const resourceValues = [ gold, essence, crystals ];
   const anyFull = resourceValues.some((v) => {
@@ -113,6 +115,11 @@ const ResourceBar = ({
             </span>
             : null}
         </div>
+        <div className="resource">
+          <span className="resource-icon">{"📈"}</span>
+          <span className="resource-value">{formatNumber(goldPerSecond)}</span>
+          <span className="resource-label">{"Gold/s"}</span>
+        </div>
         <div className={`resource${essenceFull
           ? " resource-full"
           : ""}`}>

apps/web/src/engine/tick.ts

@@ -123,6 +123,78 @@ const capResource = (value: number): number => {
   return Math.min(value, RESOURCE_CAP);
 };
 
+/**
+ * Pure function — applies one game tick to the state.
+ * DeltaSeconds: time elapsed since last tick.
+ * Returns a new GameState (does not mutate the original).
+ * @param state - The current game state.
+ * @param deltaSeconds - Time elapsed since last tick in seconds.
+ * @returns A new GameState with the tick applied.
+ */
+/**
+ * Computes the effective gold earned per second across all adventurers,
+ * including all active multipliers (upgrades, prestige, equipment, etc.).
+ * @param state - The current game state.
+ * @returns Gold per second as a number.
+ */
+export const computeGoldPerSecond = (state: GameState): number => {
+  const equippedItems: Array<Equipment> = state.equipment.filter((item) => {
+    return item.equipped;
+  });
+  const equipmentGoldMultiplier = equippedItems.reduce((mult, item) => {
+    return mult * (item.bonus.goldMultiplier ?? 1);
+  }, 1);
+  const setGoldMultiplier = computeSetBonuses(
+    equippedItems.map((item) => {
+      return item.id;
+    }),
+    EQUIPMENT_SETS,
+  ).goldMultiplier;
+
+  const runestonesIncome = state.prestige.runestonesIncomeMultiplier ?? 1;
+  const echoIncome = state.transcendence?.echoIncomeMultiplier ?? 1;
+  const craftedGoldMultiplier = state.exploration?.craftedGoldMultiplier ?? 1;
+  const companionBonus = getActiveCompanionBonus(
+    state.companions?.activeCompanionId,
+    state.companions?.unlockedCompanionIds ?? [],
+  );
+  const companionGoldMult
+    = companionBonus?.type === "passiveGold"
+      ? 1 + companionBonus.value
+      : 1;
+
+  let goldPerSecond = 0;
+  for (const adventurer of state.adventurers) {
+    if (!adventurer.unlocked || adventurer.count === 0) {
+      continue;
+    }
+    const upgradeMultiplier = state.upgrades.
+      filter((upgrade) => {
+        const isGlobal = upgrade.target === "global";
+        const isThisAdventurer
+          = upgrade.target === "adventurer"
+          && upgrade.adventurerId === adventurer.id;
+        return upgrade.purchased && (isGlobal || isThisAdventurer);
+      }).
+      reduce((mult, upgrade) => {
+        return mult * upgrade.multiplier;
+      }, 1);
+    const contribution
+      = adventurer.goldPerSecond
+      * adventurer.count
+      * upgradeMultiplier
+      * state.prestige.productionMultiplier
+      * runestonesIncome
+      * echoIncome
+      * equipmentGoldMultiplier
+      * setGoldMultiplier
+      * craftedGoldMultiplier
+      * companionGoldMult;
+    goldPerSecond = goldPerSecond + contribution;
+  }
+  return goldPerSecond;
+};
+
 /**
  * Pure function — applies one game tick to the state.
  * DeltaSeconds: time elapsed since last tick.