fix(chat): show browser hint in development

src/app/chat/chat-screen.tsx

@@ -24,6 +24,7 @@ import { useAuthState } from "@/stores/auth/auth-context";
 import type { LoginStatus } from "@/data/dto/auth";
 import { AuthStorage } from "@/data/storage/auth/auth_storage";
 import { useChatDispatch, useChatState } from "@/stores/chat/chat-context";
+import { AppEnvUtil } from "@/utils/app-env";
 
 import { MobileShell } from "@/app/_components/core";
 
@@ -155,7 +156,7 @@ export function ChatScreen() {
         </div>
 
         {/* 浏览器提示（应用内浏览器检测） */}
-        <BrowserHintOverlay />
+        <BrowserHintOverlay forceShow={AppEnvUtil.isDevelopment()} />
 
         {/* PWA 安装提示触发器（无可见 UI，3.5s 后弹 dialog） */}
         <PwaInstallOverlay />