fix: make phone authorization skippable in registration

getPhoneNumber requires verified enterprise miniprogram account.
Allow users to skip phone auth and complete registration without it.

miniprogram/pages/register/register.wxss

@@ -84,11 +84,27 @@
   border: none;
 }
 
+.phone-actions {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-top: 12rpx;
+  padding: 0 8rpx;
+}
+
 .phone-hint {
   font-size: 24rpx;
   color: #999999;
-  text-align: center;
-  margin-top: 12rpx;
+}
+
+.phone-skip {
+  font-size: 24rpx;
+  color: #E6508C;
+}
+
+.phone-skipped {
+  background: #f5f5f5;
+  border-color: #d9d9d9;
 }
 
 .phone-done {