feat(folders): 添加公开文件夹和收藏功能

- 新增文件夹可见性控制（公开/私有）
- 添加公开文件夹浏览和搜索
- 实现文件夹收藏功能
- 新增 FolderFavorite 数据模型
- 更新 Prisma 至 7.4.2
- 添加相关 i18n 翻译

src/modules/folder/folder-repository-dto.ts

@@ -1,3 +1,5 @@
+import { Visibility } from "../../../generated/prisma/enums";
+
 export interface RepoInputCreateFolder {
   name: string;
   userId: string;
@@ -21,3 +23,51 @@ export interface RepoInputUpdatePair {
   ipa1?: string;
   ipa2?: string;
 }
+
+export interface RepoInputUpdateFolderVisibility {
+  folderId: number;
+  visibility: Visibility;
+}
+
+export interface RepoInputSearchPublicFolders {
+  query: string;
+  limit?: number;
+}
+
+export interface RepoInputGetPublicFolders {
+  limit?: number;
+  offset?: number;
+  orderBy?: "createdAt" | "name";
+}
+
+export type RepoOutputPublicFolder = {
+  id: number;
+  name: string;
+  visibility: Visibility;
+  createdAt: Date;
+  userId: string;
+  userName: string | null;
+  userUsername: string | null;
+  totalPairs: number;
+  favoriteCount: number;
+};
+
+export type RepoOutputFolderVisibility = {
+  visibility: Visibility;
+  userId: string;
+};
+
+export interface RepoInputToggleFavorite {
+  folderId: number;
+  userId: string;
+}
+
+export interface RepoInputCheckFavorite {
+  folderId: number;
+  userId: string;
+}
+
+export type RepoOutputFavoriteStatus = {
+  isFavorited: boolean;
+  favoriteCount: number;
+};