feat(ywq): 新增签名类型筛选功能

- 添加 SignTemplateChoseView 组件用于选择签名类型
- 在 UnSignView 中集成签名类型筛选功能
-优化模板列表展示，支持医疗类和行政类模板分开显示
- 新增 WaterFlowDataSource 类用于处理模板数据
- 调整路由配置，添加 SignTemplateChoseView 路由

src/main/ets/http/HttpHelper.ets

@@ -119,7 +119,10 @@ export class HttpHelper {
             this.httpHandlerList.length)
         }
         if (err.message === 'Failed writing received data to disk/application') {
-          reject('cancel')
+          const error: Error = new Error()
+          error.name = 'cancel'
+          error.message = err.message
+          reject(error)
         } else {
           reject(err)
         }
@@ -199,7 +202,10 @@ export class HttpHelper {
             this.httpHandlerList.length)
         }
         if (err.message === 'Failed writing received data to disk/application') {
-          reject('cancel')
+          const error: Error = new Error()
+          error.name = 'cancel'
+          error.message = err.message
+          reject(error)
         } else {
           reject(err)
         }
@@ -279,7 +285,10 @@ export class HttpHelper {
             this.httpHandlerList.length)
         }
         if (err.message === 'Failed writing received data to disk/application') {
-          reject('cancel')
+          const error: Error = new Error()
+          error.name = 'cancel'
+          error.message = err.message
+          reject(error)
         } else {
           reject(err)
         }