fix: add authentication guard to /apps/installed routes (#23092)

* fix: add authentication guard to /apps/installed routes

- Add session validation before making tRPC calls in server component
- Redirect unauthenticated users to /auth/login instead of throwing 500 errors
- Follows existing authentication patterns used throughout the codebase
- Fixes 500 error when accessing /apps/installed/calendar and other categories

Co-Authored-By: alex@cal.com <me@alexvanandel.com>

* fix: Missing return; was that so hard, DevinAI?

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/web/app/(use-page-wrapper)/apps/installed/[category]/page.tsx

@@ -1,13 +1,17 @@
 import { createRouterCaller } from "app/_trpc/context";
 import type { PageProps } from "app/_types";
 import { _generateMetadata } from "app/_utils";
+import { cookies, headers } from "next/headers";
 import { redirect } from "next/navigation";
 import { z } from "zod";
 
+import { getServerSession } from "@calcom/features/auth/lib/getServerSession";
 import { AppCategories } from "@calcom/prisma/enums";
 import { appsRouter } from "@calcom/trpc/server/routers/viewer/apps/_router";
 import { calendarsRouter } from "@calcom/trpc/server/routers/viewer/calendars/_router";
 
+import { buildLegacyRequest } from "@lib/buildLegacyCtx";
+
 import InstalledApps from "~/apps/installed/[category]/installed-category-view";
 
 const querySchema = z.object({
@@ -31,6 +35,11 @@ const InstalledAppsWrapper = async ({ params }: PageProps) => {
     redirect("/apps/installed/calendar");
   }
 
+  const session = await getServerSession({ req: buildLegacyRequest(await headers(), await cookies()) });
+  if (!session?.user?.id) {
+    return redirect("/auth/login");
+  }
+
   const [calendarsCaller, appsCaller] = await Promise.all([
     createRouterCaller(calendarsRouter),
     createRouterCaller(appsRouter),