fix: Add navigatedToBooker event and fix infinite loop of events (#14694)

## What does this PR do?

1. cal.com/sales page is a special case where embed-iframe exists in top as well as in iframe. This causes a looping of events somehow due to embed-iframe firing events and those being received by the top embed-iframe.
2. Added new `navigatedToBooker` event to know when the user lands on booker page.


Corresponding PR in website that uses `navigatedToBooker` event  and has a demo as well https://github.com/calcom/website/pull/741

Earlier added `routed` event seems to happen too early

## Type of change
- Bug fix (non-breaking change which fixes an issue)

## How should this be tested?
- Simply navigate to booker and wait for the event.

## Mandatory Tasks
- [x] Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

## Tests
- Didn't add any tests for this as the changed seems straightforward

## Checklist
- I haven't added tests that prove my fix is effective or that my feature works

packages/embeds/embed-core/src/embed-iframe.ts

@@ -508,7 +508,10 @@ function keepParentInformedAboutDimensionChanges() {
   });
 }
 
-if (isBrowser) {
+function main() {
+  if (!isBrowser) {
+    return;
+  }
   log("Embed SDK loaded", { isEmbed: window?.isEmbed?.() || false });
   const url = new URL(document.URL);
   embedStore.theme = window?.getEmbedTheme?.();
@@ -523,6 +526,9 @@ if (isBrowser) {
   // If embed link is opened in top, and not in iframe. Let the page be visible.
   if (top === window) {
     unhideBody();
+    // We would want to avoid a situation where Cal.com embeds cal.com and then embed-iframe is in the top as well. In such case, we would want to avoid infinite loop of events being passed.
+    log("Embed SDK Skipped as we are in top");
+    return;
   }
 
   window.addEventListener("message", (e) => {
@@ -618,3 +624,5 @@ function connectPreloadedEmbed({ url }: { url: URL }) {
 const isPrerendering = () => {
   return new URL(document.URL).searchParams.get("prerender") === "true";
 };
+
+main();

packages/embeds/embed-core/src/sdk-action-manager.ts

@@ -60,6 +60,7 @@ export type EventDataMap = {
     actionType: "customPageMessage" | "externalRedirectUrl" | "eventTypeRedirectUrl";
     actionValue: string;
   };
+  navigatedToBooker: Record<string, never>;
   "*": Record<string, unknown>;
   __routeChanged: Record<string, never>;
   __windowLoadComplete: Record<string, never>;

packages/platform/atoms/booker/BookerWebWrapper.tsx

@@ -1,10 +1,11 @@
 import { useSession } from "next-auth/react";
 import { useSearchParams } from "next/navigation";
 import { usePathname, useRouter } from "next/navigation";
-import { useMemo, useCallback } from "react";
+import { useMemo, useCallback, useEffect } from "react";
 import { shallow } from "zustand/shallow";
 
 import dayjs from "@calcom/dayjs";
+import { sdkActionManager } from "@calcom/embed-core/embed-iframe";
 import type { BookerProps } from "@calcom/features/bookings/Booker";
 import { Booker as BookerComponent } from "@calcom/features/bookings/Booker";
 import { useBookerLayout } from "@calcom/features/bookings/Booker/components/hooks/useBookerLayout";
@@ -39,6 +40,10 @@ export const BookerWebWrapper = (props: BookerWebWrapperAtomProps) => {
     typeof window !== "undefined" ? new URLSearchParams(window.location.search).get("bookingUid") : null;
   const date = dayjs(selectedDate).format("YYYY-MM-DD");
 
+  useEffect(() => {
+    sdkActionManager?.fire("navigatedToBooker", {});
+  }, []);
+
   useInitializeBookerStore({
     ...props,
     eventId: event?.data?.id,