fix(cert): 优化证书过期提醒和签署流程

-增加首页切换时刷新用户数据
- 调整证书过期提醒逻辑，提高提醒频率- 优化签署流程，修正签名数据统计
- 清理部分冗余代码，提高代码可读性

src/main/ets/http/HttpHelper.ets

@@ -88,7 +88,8 @@ export class HttpHelper {
         connectTimeout: 20000,
         readTimeout: 20000,
         header: header,
-        extraData: params.data
+        extraData: params.data,
+        usingCache: false,
       })
         .then((data: http.HttpResponse) => {
           if (showLog) {
@@ -171,6 +172,7 @@ export class HttpHelper {
         connectTimeout: 20000,
         readTimeout: 20000,
         header: header,
+        usingCache: false,
         extraData: data ? encodeURI(data) : undefined
       })
         .then((data: http.HttpResponse) => {
@@ -254,6 +256,7 @@ export class HttpHelper {
         connectTimeout: 20000,
         readTimeout: 20000,
         header: params.headers,
+        usingCache: false,
         // extraData: params.data
       })
         .then((data: http.HttpResponse) => {