refactor(chat): launch external browser without dialog

src/app/chat/chat-screen.tsx

@@ -17,7 +17,6 @@ import {
   ChatInputBar,
   ChatInsufficientCreditsBanner,
   ChatUnlockDialogs,
-  ExternalBrowserDialog,
   FirstRechargeOfferBanner,
   FullscreenImageViewer,
   PwaInstallOverlay,
@@ -92,7 +91,7 @@ export function ChatScreen() {
     loginStatus: authState.loginStatus,
   });
   const shouldShowPwaInstall = state.historyLoaded && state.messages.length >= 10;
-  const externalBrowserPrompt = useExternalBrowserPrompt({
+  useExternalBrowserPrompt({
     hasInitialized: authState.hasInitialized,
     isLoading: authState.isLoading,
     loginStatus: authState.loginStatus,
@@ -198,12 +197,6 @@ export function ChatScreen() {
         {/* PWA 安装提示触发器（聊天消息数量达到阈值后才允许弹出） */}
         <PwaInstallOverlay enabled={shouldShowPwaInstall} />
 
-        <ExternalBrowserDialog
-          open={externalBrowserPrompt.open}
-          onClose={externalBrowserPrompt.close}
-          onConfirm={() => void externalBrowserPrompt.confirm()}
-        />
-
         <ChatUnlockDialogs
           unlockPaywallRequest={unlockPaywallRequest}
           onCloseInsufficientCreditsDialog={closeInsufficientCreditsDialog}