feat(api): 新增通用上传文件方法

- 添加 uploadFileWidthSn 和 uploadFileWidthSnForAnswer 方法用于上传文件
- 实现 getOssInfo 方法获取 OSS 信息
- 添加 cosUpload3D 和 cosUpload 方法上传文件到 COS- 实现 docuHousecosUpload 方法上传文件到阿里云和文档库
- 优化文件命名和错误处理

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

@@ -13,7 +13,6 @@ const signatureCanvas = useTemplateRef('signatureCanvas');
 
 const canvasWidth = ref(100);
 const canvasHeight = computed(() => canvasWidth.value / 1.5);
-const showSignText = ref(true);
 const isEraser = ref(false);
 
 let ctx: CanvasRenderingContext2D;
@@ -193,7 +192,7 @@ const emitValue = () => {
           style="border: 1px dashed #ccc; border-radius: 4px"
         >
         </canvas>
-        <div class="sign-text" v-if="active" :class="{ show: active }">
+        <div v-if="active" class="sign-text" :class="{ show: active }">
           <span
             class="icon mobilefont mobilefont-qingkong"
             title="清空"
@@ -207,7 +206,7 @@ const emitValue = () => {
           ></span>
           <span class="icon mobilefont mobilefont-shangchuan" @click="saveCanvas"></span>
         </div>
-        <div class="sign-tips" v-else>请在空白区域书写您的签名</div>
+        <div v-else class="sign-tips">请在空白区域书写您的签名</div>
       </div>
     </template>
   </van-field>
@@ -259,13 +258,14 @@ const emitValue = () => {
       }
     }
   }
+
   .sign-tips {
     position: absolute;
-    left: 50%;
     top: 50%;
+    left: 50%;
     width: max-content;
-    transform: translate(-50%, -50%);
     color: #cdcdcd;
+    transform: translate(-50%, -50%);
   }
 }
 </style>