feat: 更新内容管理方案

miniprogram/core/data/difficulty.ts

@@ -1,29 +1,21 @@
-import type { DifficultyLevel } from '../models/worksheet';
+import type { Difficulty } from '../models/worksheet';
 
 /** 产品文档：难度 入门 / 基础 / 进阶 / 挑战 → 云库 difficulty 1–4 */
-export const DIFFICULTY_LEVEL_TO_STARS: Record<
-    DifficultyLevel,
-    1 | 2 | 3 | 4
-> = {
+export const DIFFICULTY_LEVEL_TO_STARS: Record<Difficulty, 1 | 2 | 3 | 4> = {
     beginner: 1,
     basic: 2,
     intermediate: 3,
     advanced: 4,
 };
 
-export const STARS_TO_DIFFICULTY_LEVEL: Record<
-    1 | 2 | 3 | 4,
-    DifficultyLevel
-> = {
+export const STARS_TO_DIFFICULTY_LEVEL: Record<1 | 2 | 3 | 4, Difficulty> = {
     1: 'beginner',
     2: 'basic',
     3: 'intermediate',
     4: 'advanced',
 };
 
-export function difficultyToStars(
-    level?: DifficultyLevel,
-): 1 | 2 | 3 | 4 {
+export function difficultyToStars(level?: Difficulty): 1 | 2 | 3 | 4 {
     return level ? DIFFICULTY_LEVEL_TO_STARS[level] : 2;
 }
 

miniprogram/core/models/worksheet.ts

@@ -3,6 +3,9 @@ import { CategoryId } from './category';
  * 题型与模板引擎相关模型：对齐技术架构 §5.4 与云开发 worksheets 集合 §3.3
  */
 
+/** 难度等级文案键（用于前端展示与映射） */
+export type Difficulty = 'beginner' | 'basic' | 'intermediate' | 'advanced';
+
 /** 与架构文档 WorksheetConfig 一致，供云端下发 / 本地内置 */
 export interface WorksheetConfig {
     id: string;