R65 A1-A6：Session 稳定性与 409 资源错误修复

client/src/auth/AuthContext.tsx

@@ -9,7 +9,14 @@ import {
   useState,
 } from "react";
 import { configureHttpAuth } from "../api/http";
-import type { AuthState, LoginResponse, MeResponse, ProfileCompleteness } from "../api/types";
+import {
+  isApiError,
+  isSessionExpiredError,
+  type AuthState,
+  type LoginResponse,
+  type MeResponse,
+  type ProfileCompleteness,
+} from "../api/types";
 import { changePassword as changePasswordApi } from "../api/auth";
 import { clearPwaRuntimeCaches } from "../pwa";
 import {
@@ -76,6 +83,16 @@ function clearSessionHint() {
   document.cookie = "has_session=; path=/; max-age=0";
 }
 
+function wait(ms: number) {
+  return new Promise((resolve) => {
+    setTimeout(resolve, ms);
+  });
+}
+
+function isTerminalBootstrapError(error: unknown) {
+  return isSessionExpiredError(error) || (isApiError(error) && error.status === 401);
+}
+
 function normalizeProfileCompleteness(value: unknown): ProfileCompleteness {
   if (!value || typeof value !== "object") {
     return DEFAULT_PROFILE_COMPLETENESS;
@@ -353,19 +370,39 @@ export function AuthProvider({ children }: PropsWithChildren) {
 
     if (!bootstrapPromiseRef.current) {
       bootstrapPromiseRef.current = (async () => {
-        try {
-          const refreshed = await runRefresh();
+        const completeBootstrap = (refreshed: LoginResponse | null) => {
           if (refreshed?.expiresIn) {
             scheduleProactiveRefresh(refreshed.expiresIn);
           }
+
           return refreshed?.accessToken ?? null;
-        } catch {
-          if (isWindowAvailable() && window.navigator.onLine === false && offlineSnapshot) {
-            activateOfflineSnapshot(offlineSnapshot);
+        };
+
+        try {
+          return completeBootstrap(await runRefresh());
+        } catch (error) {
+          if (isTerminalBootstrapError(error)) {
+            clearSession();
+            return null;
+          }
+
+          try {
+            await wait(1000);
+            return completeBootstrap(await runRefresh());
+          } catch (retryError) {
+            if (isTerminalBootstrapError(retryError)) {
+              clearSession();
+              return null;
+            }
+
+            if (isWindowAvailable() && window.navigator.onLine === false && offlineSnapshot) {
+              activateOfflineSnapshot(offlineSnapshot);
+              return null;
+            }
+
+            clearSession();
             return null;
           }
-          clearSession();
-          return null;
         } finally {
           bootstrapPromiseRef.current = null;
         }