feat: add ability to like books

shared-types/src/index.ts

@@ -13,4 +13,5 @@ export type * from "./lib/auth.types";
 export * from "./lib/comment.types";
 export * from "./lib/audit.types";
 export * from "./lib/suggestion.types";
-export * from "./lib/common.types";
+export * from "./lib/common.types";
+export * from "./lib/like.types";

shared-types/src/lib/audit.types.ts

@@ -8,6 +8,8 @@ export enum AuditAction {
   ENTRY_CREATE = "ENTRY_CREATE",
   ENTRY_UPDATE = "ENTRY_UPDATE",
   ENTRY_DELETE = "ENTRY_DELETE",
+  LIKE = "LIKE",
+  UNLIKE = "UNLIKE",
   USER_BAN = "USER_BAN",
   USER_UNBAN = "USER_UNBAN",
   RATE_LIMIT_EXCEEDED = "RATE_LIMIT_EXCEEDED",

shared-types/src/lib/like.types.ts

@@ -0,0 +1,32 @@
+/**
+ * @copyright 2026 NHCarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+export interface Like {
+  id: string;
+  userId: string;
+  entityType: 'book' | 'game' | 'show' | 'manga' | 'music' | 'art';
+  entityId: string;
+  createdAt: Date;
+}
+
+export type CreateLikeDto = Pick<Like, 'entityType' | 'entityId'>;
+
+export interface LikeCountDto {
+  entityId: string;
+  entityType: string;
+  count: number;
+}
+
+export interface LikedItemDto {
+  like: Like;
+  item: any; // This will be the actual entity (Book, Game, etc.)
+}
+
+// Response types
+export interface LikeResponse {
+  liked: boolean;
+  count: number;
+}