feat: 评测难度默认值改为：入门级'BEGINNER'

src/state.ts

@@ -362,7 +362,7 @@ const state = reactive({
     /** 频率 */
     frequency: 0,
     /** 评测难度 */
-    evaluationDifficulty: "ADVANCED" as IDifficulty,
+    evaluationDifficulty: "BEGINNER" as IDifficulty,
     /** 保存到相册 */
     saveToAlbum: true,
     /** 开启伴奏 */