fix[create]: 预览题目统一

- 预览题目跟随pc， 取 title 值

src/views/Design/components/Questions/SignQuestion.vue

@@ -6,7 +6,7 @@ const element = defineModel<question>('element', { default: {} });
 // 属性框是否激活
 const active = defineModel<boolean>('active', { default: false });
 // 题目索引
-const index = defineModel<number>('index', { default: 0 });
+const index = defineModel<number | string>('index', { default: 0 });
 // 答案
 const answer = defineModel<string>('answer', { default: '' });
 // 错误信息
@@ -188,7 +188,7 @@ const emitValue = () => {
 /**
  * 上传文件
  */
-async function handleUploadImg() {
+async function handleUploadImg () {
   const file = new File([saveCanvas('blob')!], 'sign.png', { type: 'image/png' });
   const { url } = await CommonApi.cosUpload(file);
   // 传递答案
@@ -197,44 +197,23 @@ async function handleUploadImg() {
 </script>
 
 <template>
-  <van-field
-    :label="element.stem"
-    :required="element.config.is_required === 1"
-    label-align="top"
-    :border="false"
-    readonly
-  >
+  <van-field :label="element.stem" :required="element.config.is_required === 1" label-align="top" :border="false"
+    readonly>
     <template #left-icon> {{ isPreview ? element.title : index + 1 }}. </template>
     <template #label>
-      <contenteditable
-        v-model="element.stem"
-        className="contenteditable-label"
-        :active="active"
-        @blur="emitValue"
-        :errorMessage="errorMessage"
-      ></contenteditable>
+      <contenteditable v-model="element.stem" className="contenteditable-label" :active="active" @blur="emitValue"
+        :errorMessage="errorMessage"></contenteditable>
     </template>
     <template #input>
       <div class="sign-question">
-        <canvas
-          ref="signatureCanvas"
-          :width="canvasWidth"
-          :height="canvasHeight"
-          style="border: 1px dashed #ccc; border-radius: 4px"
-        >
+        <canvas ref="signatureCanvas" :width="canvasWidth" :height="canvasHeight"
+          style="border: 1px dashed #ccc; border-radius: 4px">
         </canvas>
         <div class="sign-text" :class="{ show: true }">
-          <span
-            class="icon mobilefont mobilefont-qingkong"
-            title="清空"
-            @click="clearCanvas"
-          ></span>
+          <span class="icon mobilefont mobilefont-qingkong" title="清空" @click="clearCanvas"></span>
           <span class="icon mobilefont mobilefont-chexiao" @click="undo"></span>
-          <span
-            class="icon mobilefont"
-            :class="isEraser ? 'mobilefont-huabi' : 'mobilefont-rubber'"
-            @click="togglePen"
-          ></span>
+          <span class="icon mobilefont" :class="isEraser ? 'mobilefont-huabi' : 'mobilefont-rubber'"
+            @click="togglePen"></span>
           <span class="icon mobilefont mobilefont-shangchuan" @click="handleUploadImg"></span>
         </div>
         <div class="sign-tips">请在空白区域书写您的签名</div>