feat: 添加登录失败处理及记录格式化功能

增加登录失败状态处理和重试机制
将记录格式化逻辑提取到工具函数
优化云数据库查询性能

pages/index/index.wxss

@@ -56,6 +56,30 @@ page {
   color: #999;
 }
 
+/* 登录失败 */
+.fail-icon {
+  font-size: 80rpx;
+  margin-bottom: 20rpx;
+}
+
+.fail-text {
+  font-size: 28rpx;
+  color: #999;
+  margin-bottom: 32rpx;
+}
+
+.retry-btn {
+  font-size: 28rpx;
+  color: #fff;
+  background: #1890ff;
+  padding: 16rpx 56rpx;
+  border-radius: 36rpx;
+}
+
+.retry-btn:active {
+  background: #096dd9;
+}
+
 .header-title {
   font-size: 44rpx;
   font-weight: 700;
@@ -80,11 +104,12 @@ page {
   border-radius: 20rpx;
   padding: 36rpx 32rpx;
   margin-bottom: 24rpx;
-  box-shadow: 0 2rpx 12rpx rgba(0, 0, 0, 0.06);
+  box-shadow: 0 8rpx 32rpx rgba(24, 144, 255, 0.12), 0 2rpx 8rpx rgba(0, 0, 0, 0.06);
 }
 
 .action-card:active {
   background: #f0f0f0;
+  box-shadow: 0 4rpx 16rpx rgba(24, 144, 255, 0.08), 0 1rpx 4rpx rgba(0, 0, 0, 0.04);
 }
 
 .action-icon-wrap {
@@ -140,7 +165,7 @@ page {
   border-radius: 20rpx;
   padding: 28rpx 32rpx;
   margin-top: 8rpx;
-  box-shadow: 0 2rpx 12rpx rgba(0, 0, 0, 0.06);
+  box-shadow: 0 8rpx 32rpx rgba(82, 196, 26, 0.12), 0 2rpx 8rpx rgba(0, 0, 0, 0.06);
 }
 
 .latest-header {