feat: add equipment set bonuses and boss bounty runestones

- Define EquipmentSet type + computeSetBonuses utility in packages/types
- Add setId field to Equipment type and assign sets to 27 equipment items
- Create 9 named equipment sets (Iron Vanguard → Eternal Throne) with 2pc/3pc bonuses
- Apply set combat multiplier in boss route
- Apply set gold/click multipliers in tick engine and click handler
- Include set bonuses in anti-cheat delta validation
- Show active set bonus strip + set badge per card in EquipmentPanel
- Add boss first-kill bounty runestones (scaling 1–10 per boss tier)
- Update AboutPanel and IDEAS.md

packages/types/src/index.ts

@@ -35,6 +35,8 @@ export type {
   EquipmentRarity,
   EquipmentType,
 } from "./interfaces/Equipment.js";
+export type { EquipmentSet, EquipmentSetBonus } from "./interfaces/EquipmentSet.js";
+export { computeSetBonuses } from "./interfaces/EquipmentSet.js";
 export type { GameState } from "./interfaces/GameState.js";
 export type { Player } from "./interfaces/Player.js";
 export type { PrestigeData } from "./interfaces/Prestige.js";

packages/types/src/interfaces/Boss.ts

@@ -23,4 +23,6 @@ export interface Boss {
   prestigeRequirement: number;
   /** Zone this boss belongs to */
   zoneId: string;
+  /** One-time runestone bounty awarded on first-ever defeat */
+  bountyRunestones: number;
 }

packages/types/src/interfaces/Equipment.ts

@@ -24,4 +24,6 @@ export interface Equipment {
   equipped: boolean;
   /** If set, this item can be purchased directly rather than obtained via boss drops */
   cost?: { gold: number; essence: number; crystals: number };
+  /** Equipment set this item belongs to, if any */
+  setId?: string;
 }

packages/types/src/interfaces/EquipmentSet.ts

@@ -0,0 +1,44 @@
+export interface EquipmentSetBonus {
+  goldMultiplier?: number;
+  combatMultiplier?: number;
+  clickMultiplier?: number;
+}
+
+export interface EquipmentSet {
+  id: string;
+  name: string;
+  description: string;
+  /** Equipment IDs that make up this set */
+  pieces: string[];
+  bonuses: {
+    2: EquipmentSetBonus;
+    3: EquipmentSetBonus;
+  };
+}
+
+/**
+ * Given a list of equipped item IDs and a set catalogue, returns the combined
+ * multiplicative bonuses granted by all active set bonuses.
+ */
+export const computeSetBonuses = (
+  equippedItemIds: string[],
+  sets: EquipmentSet[],
+): { goldMultiplier: number; combatMultiplier: number; clickMultiplier: number } => {
+  let goldMultiplier = 1;
+  let combatMultiplier = 1;
+  let clickMultiplier = 1;
+
+  for (const set of sets) {
+    const count = set.pieces.filter((id) => equippedItemIds.includes(id)).length;
+    for (const threshold of [2, 3] as const) {
+      if (count >= threshold) {
+        const bonus = set.bonuses[threshold];
+        goldMultiplier *= bonus.goldMultiplier ?? 1;
+        combatMultiplier *= bonus.combatMultiplier ?? 1;
+        clickMultiplier *= bonus.clickMultiplier ?? 1;
+      }
+    }
+  }
+
+  return { goldMultiplier, combatMultiplier, clickMultiplier };
+};

packages/types/tsconfig.json

@@ -5,5 +5,5 @@
     "rootDir": ".",
     "declaration": true
   },
-  "exclude": ["test/**/*.ts"]
+  "exclude": ["test/**/*.ts", "prod/**"]
 }