feat: 增加环境切换

miniprogram/services/api-activity.ts

@@ -0,0 +1,13 @@
+let pendingWrites = 0;
+
+/** 覆盖登录等待、上传及重试全过程，防止写操作进行中切换服务端。 */
+export function beginApiWrite() {
+    pendingWrites++;
+    return () => {
+        pendingWrites--;
+    };
+}
+
+export function hasPendingApiWrites() {
+    return pendingWrites > 0;
+}