feat: 绘制基础类重构

miniprogram/service/wordDrawService.ts

@@ -1,3 +1,13 @@
+/**
+ * 田字格练字服务
+ * 根据汉字列表绘制到Canvas
+ *
+ * 支持的汉字类型：
+ * - character：汉字
+ * - number：数字
+ * - letter：字母
+ * - symbol：符号
+ */
 import { BaseDrawService } from '../core/draw/baseDraw';
 import { CharacterItem } from '../types/characterType';
 
@@ -255,32 +265,28 @@ class WordDrawService extends BaseDrawService {
         this.clear();
         this.setPaper();
 
-        // 绘制Header
-        if (this.headerType !== 'minimal') {
-            await this.drawHeader();
-        } else {
-            this.drawMiniHeader();
-        }
-
+        await this.drawHeader();
         this.drawDivider();
-        this.drawContentEmpty();
+        await this.drawContentEmpty();
     }
 
     async drawContentEmpty() {
         this.clearContentArea();
         this.drawContent(null);
+        await this.drawPrintFooter();
     }
 
     /**
      * 绘制田字格和练字内容
      * @param wordsMap 形如 { "其": ["M.. L.. Z", ...], ... }，不超过 10 个汉字
      */
-    drawPracticeContent(characters: CharacterItem[]) {
+    async drawPracticeContent(characters: CharacterItem[]) {
         // 清空内容区域（页眉以下的部分）
         this.clearContentArea();
 
         // 绘制田字格和练字内容
         this.drawContent(characters);
+        await this.drawPrintFooter();
     }
 
     /**