R65 A1-A6：Session 稳定性与 409 资源错误修复

client/src/pwa.ts

@@ -5,6 +5,29 @@ const MOBILE_APPROVAL_TASK_PATH = /^\/workflow\/tasks\/([^/]+)$/i;
 const OFFLINE_ALLOWED_PATHS = ["/mobile/approvals"];
 const CLEARABLE_CACHE_PREFIXES = ["app-api-runtime", "app-static-runtime", "workbox-precache"];
 
+function bindServiceWorkerUpdateCleanup(registration: ServiceWorkerRegistration | undefined) {
+  if (!canUseWindow() || !registration) {
+    return;
+  }
+
+  const watchInstallingWorker = (worker: ServiceWorker | null) => {
+    if (!worker) {
+      return;
+    }
+
+    worker.addEventListener("statechange", () => {
+      if (worker.state === "installed" && window.navigator.serviceWorker.controller) {
+        void clearPwaRuntimeCaches();
+      }
+    });
+  };
+
+  watchInstallingWorker(registration.installing);
+  registration.addEventListener("updatefound", () => {
+    watchInstallingWorker(registration.installing);
+  });
+}
+
 export function registerPwaIfEnabled() {
   if (import.meta.env.DEV) {
     return;
@@ -14,13 +37,25 @@ export function registerPwaIfEnabled() {
     return;
   }
 
-  registerSW({
+  let updateServiceWorker: ((reloadPage?: boolean) => Promise<void>) | null = null;
+
+  updateServiceWorker = registerSW({
     immediate: true,
+    onNeedRefresh() {
+      void clearPwaRuntimeCaches()
+        .catch(() => undefined)
+        .finally(() => {
+          void updateServiceWorker?.(true);
+        });
+    },
     onOfflineReady() {
       if (canUseWindow()) {
         window.dispatchEvent(new CustomEvent("hyb-oa:pwa-offline-ready"));
       }
     },
+    onRegisteredSW(_swScriptUrl, registration) {
+      bindServiceWorkerUpdateCleanup(registration);
+    },
   });
 }