增加企微旧包刷新护栏（07-27-yang-jun-reimbursement-readiness）

client/src/main.tsx

@@ -6,7 +6,7 @@ import { ErrorBoundary } from "./components/common/ErrorBoundary";
 import { Toaster } from "./components/ui/sonner";
 import { queryClient } from "./query/queryClient";
 import { appRouter } from "./router";
-import { clearPwaRuntimeCaches, registerPwaIfEnabled } from "./pwa";
+import { clearPwaRuntimeCaches, installBuildFreshnessMonitor, registerPwaIfEnabled } from "./pwa";
 import "./index.css";
 
 document.documentElement.dataset.buildSha = String(import.meta.env.VITE_BUILD_SHA || "development").slice(0, 12);
@@ -107,6 +107,7 @@ function installChunkLoadRecovery() {
 }
 
 installChunkLoadRecovery();
+installBuildFreshnessMonitor();
 registerPwaIfEnabled();
 
 ReactDOM.createRoot(document.getElementById("root")!).render(