修复：部署无法到达已打开的页面（新增构建版本标记 + 陈旧页面自动重载） (#39)

public/js/store.js

@@ -82,7 +82,7 @@ export const initialState = Object.freeze({
   ticker: [],
   emotes: [],
   clock: { offset: 0, rtt: null, synced: false },
-  ui: { pendingJoin: null, restoring: false },
+  ui: { pendingJoin: null, restoring: false, buildStale: false },
 });
 
 /** The app-wide store singleton. */