refactor(app): tighten chat and sync boundaries

src/stores/sync/chat-auth-sync.tsx

@@ -0,0 +1,73 @@
+"use client";
+
+/**
+ * Auth → Chat 同步器
+ *
+ * Chat machine 不直接感知 Auth machine；这里作为根级桥接器，持续监听
+ * loginStatus 变化并派发 chat 鉴权生命周期事件。这样页面组件只负责 UI，
+ * 不再承担全局状态同步职责。
+ */
+import { useEffect, useRef } from "react";
+import { usePathname, useRouter } from "next/navigation";
+
+import { AuthStorage } from "@/data/storage/auth";
+import { useAuthState } from "@/stores/auth/auth-context";
+import { useChatDispatch } from "@/stores/chat/chat-context";
+import { PROTECTED_ROUTES, ROUTES, type StaticRoute } from "@/router/routes";
+
+function isProtectedPath(pathname: string): boolean {
+  return PROTECTED_ROUTES.some((route: StaticRoute) => pathname === route);
+}
+
+export function ChatAuthSync() {
+  const authState = useAuthState();
+  const chatDispatch = useChatDispatch();
+  const pathname = usePathname();
+  const router = useRouter();
+  const prevSessionKeyRef = useRef<string | null>(null);
+
+  useEffect(() => {
+    if (!authState.hasInitialized || authState.isLoading) return;
+
+    const sessionKey = authState.loginStatus;
+    if (prevSessionKeyRef.current === sessionKey) return;
+    prevSessionKeyRef.current = sessionKey;
+
+    if (authState.loginStatus === "notLoggedIn") {
+      chatDispatch({ type: "ChatLogout" });
+      if (isProtectedPath(pathname)) {
+        router.replace(ROUTES.splash);
+      }
+      return;
+    }
+
+    if (authState.loginStatus === "guest") {
+      chatDispatch({ type: "ChatGuestLogin" });
+      return;
+    }
+
+    let cancelled = false;
+    void (async () => {
+      const tokenR = await AuthStorage.getInstance().getLoginToken();
+      if (!cancelled && tokenR.success && tokenR.data) {
+        chatDispatch({
+          type: "ChatUserLogin",
+          token: tokenR.data,
+        });
+      }
+    })();
+
+    return () => {
+      cancelled = true;
+    };
+  }, [
+    authState.hasInitialized,
+    authState.isLoading,
+    authState.loginStatus,
+    chatDispatch,
+    pathname,
+    router,
+  ]);
+
+  return null;
+}