fix(splash): reuse latest chat message preview

src/providers/root-providers.tsx

@@ -3,12 +3,13 @@
 /**
  * 根级 Client Providers 包装
  *
- * 这里只保留跨路由的 Auth、User 和 viewport Provider。Chat、Payment、
- * PrivateRoom 状态机由对应路由 layout 按需挂载。
+ * 这里只保留跨路由的 Auth、User、消息预览和 viewport Provider。Chat、
+ * Payment、PrivateRoom 状态机由对应路由 layout 按需挂载。
  */
 
 import type { ReactNode } from "react";
 
+import { SplashLatestMessageProvider } from "@/providers/splash-latest-message-provider";
 import { ViewportCssVarsProvider } from "@/providers/viewport-css-vars-provider";
 import { AppNavigationGuard } from "@/router/app-navigation-guard";
 import { AuthProvider } from "@/stores/auth/auth-context";
@@ -28,11 +29,13 @@ export function RootProviders({ children }: RootProvidersProps) {
         <AuthStatusChecker />
         <OAuthSessionSync />
         <AppNavigationGuard />
-        <UserProvider>
-          <UserAuthSync />
-          {children}
-          <div id="toast-portal" />
-        </UserProvider>
+        <SplashLatestMessageProvider>
+          <UserProvider>
+            <UserAuthSync />
+            {children}
+            <div id="toast-portal" />
+          </UserProvider>
+        </SplashLatestMessageProvider>
       </AuthProvider>
     </ViewportCssVarsProvider>
   );