feat(chat): add promotional external entry flow

src/app/chat/components/chat-unlock-dialogs.tsx

@@ -10,26 +10,30 @@ export interface ChatUnlockDialogsProps {
   unlockPaywallRequest: ChatUnlockPaywallRequest | null;
   onCloseInsufficientCreditsDialog: () => void;
   onConfirmInsufficientCreditsDialog: () => void;
+  includeHistoryUnlock?: boolean;
 }
 
 export function ChatUnlockDialogs({
   unlockPaywallRequest,
   onCloseInsufficientCreditsDialog,
   onConfirmInsufficientCreditsDialog,
+  includeHistoryUnlock = true,
 }: ChatUnlockDialogsProps) {
   const chatState = useChatState();
   const chatDispatch = useChatDispatch();
 
   return (
     <>
-      <HistoryUnlockDialog
-        open={chatState.unlockHistoryPromptVisible}
-        lockedCount={chatState.lockedHistoryCount}
-        isLoading={chatState.isUnlockingHistory}
-        errorMessage={chatState.unlockHistoryError}
-        onClose={() => chatDispatch({ type: "ChatUnlockHistoryDismissed" })}
-        onConfirm={() => chatDispatch({ type: "ChatUnlockHistoryConfirmed" })}
-      />
+      {includeHistoryUnlock ? (
+        <HistoryUnlockDialog
+          open={chatState.unlockHistoryPromptVisible}
+          lockedCount={chatState.lockedHistoryCount}
+          isLoading={chatState.isUnlockingHistory}
+          errorMessage={chatState.unlockHistoryError}
+          onClose={() => chatDispatch({ type: "ChatUnlockHistoryDismissed" })}
+          onConfirm={() => chatDispatch({ type: "ChatUnlockHistoryConfirmed" })}
+        />
+      ) : null}
       <InsufficientCreditsDialog
         open={unlockPaywallRequest !== null}
         creditBalance={unlockPaywallRequest?.creditBalance ?? 0}