fix: update difficulty classification to match 1★=easy, 2-3★=medium, 4-5★=hard

Author: CC11001100

src/components/ChallengeListPage/index.tsx

@@ -214,11 +214,11 @@ const ChallengeListPage = () => {
         if (difficultyParams.length === 1) {
             const diffParam = difficultyParams[0];
             if (diffParam === 'easy') {
-                difficultyParams = ['1', '2'];
+                difficultyParams = ['1'];
             } else if (diffParam === 'medium') {
-                difficultyParams = ['3', '4'];
+                difficultyParams = ['2', '3'];
             } else if (diffParam === 'hard') {
-                difficultyParams = ['5'];
+                difficultyParams = ['4', '5'];
             }
         }
 

src/components/HomePage/index.tsx

@@ -11,11 +11,11 @@ import { useMediaQuery } from 'react-responsive';
 const getDifficultyCounts = () => {
   const counts = { easy: 0, medium: 0, hard: 0 };
   challenges.forEach(challenge => {
-    // 匹配挑战列表页面的难度分类:
-    // easy: 1-2星, medium: 3-4星, hard: 5星
-    if (challenge.difficulty <= 2) counts.easy++;
-    else if (challenge.difficulty <= 4) counts.medium++;
-    else if (challenge.difficulty === 5) counts.hard++;
+    // 匹配新的难度分类:
+    // easy: 1星, medium: 2-3星, hard: 4-5星
+    if (challenge.difficulty === 1) counts.easy++;
+    else if (challenge.difficulty === 2 || challenge.difficulty === 3) counts.medium++;
+    else if (challenge.difficulty >= 4) counts.hard++;
   });
   return counts;
 };