feat: 增加字母笔顺图片

miniprogram/englishPages/letterTracing/draw/letterTracingDraw.ts

@@ -4,7 +4,7 @@ import singleLetterDraw from './singleLetterDraw';
 import CasePairingDraw from './casePairingDraw';
 import TwoColumnDraw from './twoColumnDraw';
 import UpperLowerDraw from './upperLowerDraw';
-import SingleLineDraw from './singleLineDraw';
+import HalfLetterDraw from './halfLetterDraw';
 import TripleDraw from './tripleDraw';
 import DailyCheckinDraw from './dailyCheckinDraw';
 
@@ -19,7 +19,7 @@ export default class LetterTracingDraw extends BaseDrawService {
             'letter-tracing-upper-lower': UpperLowerDraw,
             'letter-tracing-case-pairing': CasePairingDraw,
             'letter-tracing-two-column': TwoColumnDraw,
-            'letter-tracing-half': SingleLineDraw,
+            'letter-tracing-half': HalfLetterDraw,
             'letter-tracing-three': TripleDraw,
             'letter-tracing-daily-checkin': DailyCheckinDraw,
         }[data.mode];