fix[design]: 修复签名异常

- 签名题目在特定情况下会出现边框溢出的问题， 现在将边框的宽度设定为 window.innerWidth * 0.8

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

@@ -17,7 +17,7 @@ const errorMessage = defineModel<string>('errorMessage', { default: '' });
 const isPreview = defineModel('isPreview', { default: false });
 const signatureCanvas = useTemplateRef('signatureCanvas');
 
-const canvasWidth = ref(100);
+const canvasWidth = ref(window.innerWidth * 0.8);
 const canvasHeight = computed(() => canvasWidth.value / 1);
 const isEraser = ref(false);
 
@@ -62,15 +62,13 @@ const togglePen = () => {
   setPenStyle();
 };
 
-const route = useRoute()
+const route = useRoute();
 
 onMounted(() => {
   // 设置页面刷新标记
   sessionStorage.setItem('is_page_refresh', '1');
 
   if (!signatureCanvas.value) return;
-  // 将 canvas 宽度和窗口的宽度保持一致
-  canvasWidth.value = window.innerWidth - 60;
 
   // 获取 canvas 上下文
   ctx = signatureCanvas.value.getContext('2d')!;
@@ -278,7 +276,10 @@ function saveCanvasState () {
       const tx = db.transaction('canvasState', 'readwrite');
       const store = tx.objectStore('canvasState');
       // 只存储 base64 字符串，而不是 ImageData 对象
-      store.put({ canvasDataUrl, currentStep: currentStep.value }, element.value.id || 'default_id');
+      store.put(
+        { canvasDataUrl, currentStep: currentStep.value },
+        element.value.id || 'default_id'
+      );
       tx.oncomplete = () => {
         db.close();
       };
@@ -290,7 +291,7 @@ function saveCanvasState () {
 onUnmounted(() => {
   // 当组件注销时，保存状态
   saveCanvasState();
-})
+});
 
 /**
  * 恢复canvas 状态
@@ -352,7 +353,7 @@ function restoreCanvasState () {
 onMounted(() => {
   // 当组件加载时，恢复状态
   restoreCanvasState();
-})
+});
 
 /**
  * 清除画布状态
@@ -386,23 +387,44 @@ window.addEventListener('beforeunload', () => {
 </script>
 
 <template>
-  <van-field :label="element.stem" :required="element.config.is_required === 1" label-align="top" :border="false"
+  <van-field
-    readonly>
+    :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"
+      <contenteditable
-        :errorMessage="errorMessage"></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"
+        <canvas
-          style="border: 1px dashed #ccc; border-radius: 4px">
+          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'"
+          <span
-            @click="togglePen"></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>