refactor(auth): centralize login status sync

src/app/chat/chat-screen.tsx

@@ -10,22 +10,18 @@
  *   - BrowserHintOverlay：浏览器提示
  *
  * 鉴权解耦（事件驱动）：
- *   - chat 机器不感知鉴权 / 不管 WebSocket —— 由 chat-screen 派生 loginStatus
- *   - chat-screen 只派 3 个事件：
- *     - `ChatGuestLogin` → 游客会话（断 WS = 不连）
- *     - `ChatNonGuestLogin { token }` → 非游客会话（连 WS）
- *     - `ChatLogout` → 登出（机器自动 cleanup WS actor）
- *   - chat 机器内部用 fromCallback actor 完整管理 WS 生命周期
+ *   - chat 机器不感知鉴权 / 不管 WebSocket
+ *   - auth → chat 的生命周期同步由根级 <ChatAuthSync /> 负责
+ *   - ChatScreen 只派生 UI 展示所需的 isGuest
  */
 import { useEffect, useRef, useState } from "react";
 import Image from "next/image";
-import { useRouter } from "next/navigation";
 
 import { useAuthState } from "@/stores/auth/auth-context";
 import type { LoginStatus } from "@/data/dto/auth";
 import { AuthStorage } from "@/data/storage/auth/auth_storage";
 import { UserStorage } from "@/data/storage/user/user_storage";
-import { useChatDispatch, useChatState } from "@/stores/chat/chat-context";
+import { useChatState } from "@/stores/chat/chat-context";
 import { AppEnvUtil, BrowserDetector, UrlLauncherUtil } from "@/utils";
 import { ROUTE_BUILDERS, ROUTES } from "@/router/routes";
 
@@ -50,39 +46,9 @@ function deriveIsGuest(loginStatus: LoginStatus): boolean {
   return loginStatus === "guest";
 }
 
-/**
- * 按 loginStatus 派鉴权生命周期事件（chat 机器不感知 loginStatus —— 这层转换在此）
- *
- * 设计：不直接管理 WS / 不读 AuthStorage（除取 token）
- */
-function dispatchAuthLifecycle(
-  loginStatus: LoginStatus,
-  chatDispatch: ReturnType<typeof useChatDispatch>,
-): void {
-  if (loginStatus === "guest") {
-    // 游客：派 ChatGuestLogin（chat 机器不连 WS —— 业务事实"断 WS"）
-    chatDispatch({ type: "ChatGuestLogin" });
-    return;
-  }
-  if (loginStatus === "notLoggedIn") {
-    // 登出：派 ChatLogout（chat 机器自动 cleanup WS actor + 清消息）
-    chatDispatch({ type: "ChatLogout" });
-    return;
-  }
-  // 非游客：拿 loginToken → 派 ChatNonGuestLogin { token }
-  void (async () => {
-    const tokenR = await AuthStorage.getInstance().getLoginToken();
-    if (tokenR.success && tokenR.data) {
-      chatDispatch({ type: "ChatNonGuestLogin", token: tokenR.data });
-    }
-  })();
-}
-
 export function ChatScreen() {
-  const router = useRouter();
   const state = useChatState();
   const authState = useAuthState();
-  const chatDispatch = useChatDispatch();
   const [showExternalBrowserDialog, setShowExternalBrowserDialog] =
     useState(false);
 
@@ -98,37 +64,7 @@ export function ChatScreen() {
   const showExhaustedBanner =
     isGuest && state.quotaLoaded && state.quotaExceededTrigger > 0;
 
-  // ─────────────────────────────────────────────────────────────
-  // loginStatus 变化 → 派对应鉴权生命周期事件
-  //
-  // 规则：
-  //   - AuthInit 未完成 → 等，避免初始 notLoggedIn 把 /chat 变成死状态
-  //   - AuthInit 完成后仍 "notLoggedIn" → 清 chat 并回 splash
-  //   - 登录态变化（guest→email 等）→ 派 ChatGuestLogin 或 ChatNonGuestLogin
-  // ─────────────────────────────────────────────────────────────
-  const prevLoginStatusRef = useRef<LoginStatus | null>(null);
   const externalBrowserPromptShownRef = useRef(false);
-  useEffect(() => {
-    if (!authState.hasInitialized || authState.isLoading) return;
-
-    const prev = prevLoginStatusRef.current;
-    if (prev === authState.loginStatus) return; // 登录态没变
-    prevLoginStatusRef.current = authState.loginStatus;
-
-    if (authState.loginStatus === "notLoggedIn") {
-      chatDispatch({ type: "ChatLogout" });
-      router.replace(ROUTES.splash);
-      return;
-    }
-
-    dispatchAuthLifecycle(authState.loginStatus, chatDispatch);
-  }, [
-    authState.hasInitialized,
-    authState.isLoading,
-    authState.loginStatus,
-    chatDispatch,
-    router,
-  ]);
 
   useEffect(() => {
     if (!authState.hasInitialized || authState.isLoading) return;