外观设置改为单页分区；发帖草稿与板块校验优化，WS 延迟释放避开 Strict Mode 误断。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/components/Header.tsx

@@ -65,6 +65,10 @@ export default function Header({
   const router = useRouter();
   const pathname = usePathname();
   const allowMessages = useAllowMessages();
+  const hideComposeNav =
+    pathname === "/compose" ||
+    (pathname?.startsWith("/compose/") ?? false) ||
+    /^\/post\/[^/]+\/edit\/?$/.test(pathname || "");
   const [menuOpen, setMenuOpen] = useState(false);
   // 登录态以 SSR 直出为初始值，F5 无切换闪动；router.refresh() 后随 props 校正
   const [user, setUser] = useState<User | null>(initialUser);
@@ -318,9 +322,11 @@ export default function Header({
           {user && <NotificationBell initialUnread={unread} />}
           {user ? (
             <>
-              <Link href="/compose" className="btn btn-primary btn-sm hidden lg:inline-flex">
-                <PenSquare size={14} /> 发帖
-              </Link>
+              {!hideComposeNav && (
+                <Link href="/compose" className="btn btn-primary btn-sm hidden lg:inline-flex">
+                  <PenSquare size={14} /> 发帖
+                </Link>
+              )}
               <UserMenu user={user} onLogout={handleLogout} />
             </>
           ) : (
@@ -368,7 +374,7 @@ export default function Header({
           </form>
           <div className="flex flex-col">
             <MobileLink href="/" active={pathname === "/"}>首页</MobileLink>
-            {user && <MobileLink href="/compose">发帖</MobileLink>}
+            {user && !hideComposeNav && <MobileLink href="/compose">发帖</MobileLink>}
             {user && allowMessages && (
               <MobileLink href="/chat" active={pathname?.startsWith("/chat") ?? false}>
                 <span className="inline-flex items-center gap-2">