refactor(chat): make external browser launch user initiated

src/app/chat/chat-screen.tsx

@@ -34,7 +34,6 @@ import { useFirstRechargeOfferBanner } from "./hooks/use-first-recharge-offer-ba
 import { useChatUnlockNavigationFlow } from "./hooks/use-chat-unlock-navigation-flow";
 import { useChatGuestLogin } from "./hooks/use-chat-guest-login";
 import { useChatMessageLimitBanner } from "./hooks/use-chat-message-limit-banner";
-import { useExternalBrowserPrompt } from "./hooks/use-external-browser-prompt";
 import styles from "./components/chat-screen.module.css";
 
 export function ChatScreen() {
@@ -91,11 +90,6 @@ export function ChatScreen() {
     loginStatus: authState.loginStatus,
   });
   const shouldShowPwaInstall = state.historyLoaded && state.messages.length >= 10;
-  useExternalBrowserPrompt({
-    hasInitialized: authState.hasInitialized,
-    isLoading: authState.isLoading,
-    loginStatus: authState.loginStatus,
-  });
 
   useChatGuestLogin({
     dispatch: authDispatch,