补充积分逻辑

src/models/DOBlock.ts

@@ -29,6 +29,8 @@ export class DOBlock {
     public set_show(show: number): void {
         this.data.show = show
         this.checked = show == this.get_correct()
+        if (this.checked == false)
+            this.set_score(0)
         StorageManager.getInstance().onChanged()
     }