feat: favorites — type, mock data, and buttons on player/shop detail pages

lib/mock-data.ts

@@ -3,6 +3,7 @@ import type {
   ChatSession,
   Comment,
   Dispute,
+  Favorite,
   Game,
   Notification,
   Order,
@@ -567,3 +568,20 @@ export const mockTransactions: WalletTransaction[] = [
 
 export const currentUser = mockUsers[0]
 export const walletBalance = 430
+
+export const mockFavorites: Favorite[] = [
+  {
+    id: "fav1",
+    userId: "u1",
+    targetType: "player",
+    targetId: "u2",
+    createdAt: "2025-02-16T10:00:00",
+  },
+  {
+    id: "fav2",
+    userId: "u1",
+    targetType: "shop",
+    targetId: "shop1",
+    createdAt: "2025-02-17T14:00:00",
+  },
+]

lib/types.ts

@@ -192,3 +192,11 @@ export interface WalletTransaction {
   description: string
   createdAt: string
 }
+
+export interface Favorite {
+  id: string
+  userId: string
+  targetType: "player" | "shop"
+  targetId: string
+  createdAt: string
+}