feat(treasure): add treasure quest, quest modal, island node, quest widget

src/types/quest.ts

@@ -0,0 +1,60 @@
+// ─── Quest System Types ───────────────────────────────────────────────────────
+// Swap dummy data for API responses later — shape stays the same.
+
+export type RequirementType =
+  | "questions"
+  | "accuracy"
+  | "streak"
+  | "sessions"
+  | "topics"
+  | "xp"
+  | "leaderboard";
+
+export type NodeStatus = "locked" | "active" | "claimable" | "completed";
+
+export type RewardItem = "streak_shield" | "xp_boost" | "title";
+
+export interface QuestReward {
+  xp: number;
+  title?: string; // crew rank title, e.g. "Navigator"
+  item?: RewardItem;
+  itemLabel?: string; // human-readable, e.g. "Streak Shield ×1"
+}
+
+export interface QuestNode {
+  id: string;
+  title: string;
+  flavourText: string;
+  islandName: string; // displayed under the node
+  emoji: string; // island character emoji
+  requirement: {
+    type: RequirementType;
+    target: number;
+    label: string; // e.g. "questions answered"
+  };
+  progress: number; // 0 → requirement.target  (API will fill this)
+  status: NodeStatus;
+  reward: QuestReward;
+}
+
+export interface QuestArc {
+  id: string;
+  name: string; // "East Blue", "Alabasta", "Skypiea"
+  subtitle: string; // short flavour line
+  emoji: string;
+  accentColor: string; // CSS color for this arc's theme
+  accentDark: string;
+  bgFrom: string; // gradient start for arc header
+  bgTo: string;
+  nodes: QuestNode[];
+}
+
+// ─── Crew Rank ladder (shown on profile / leaderboard) ───────────────────────
+export const CREW_RANKS = [
+  { id: "cabin_boy", label: "Cabin Boy", emoji: "⚓", xpRequired: 0 },
+  { id: "navigator", label: "Navigator", emoji: "🗺️", xpRequired: 500 },
+  { id: "first_mate", label: "First Mate", emoji: "⚔️", xpRequired: 1500 },
+  { id: "warlord", label: "Warlord", emoji: "🔱", xpRequired: 3000 },
+  { id: "emperor", label: "Emperor", emoji: "👑", xpRequired: 6000 },
+  { id: "pirate_king", label: "Pirate King", emoji: "🏴‍☠️", xpRequired: 10000 },
+] as const;