refactor: remove core-trpc from main (scaffoldable via gen core-package trpc)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web-tanstack/src/routes/__root.tsx

@@ -1,10 +1,5 @@
 import { Outlet, createRootRoute } from "@tanstack/react-router";
-import { TanstackTrpcProvider } from "@repo/core-trpc/tanstack";
 
 export const Route = createRootRoute({
-  component: () => (
-    <TanstackTrpcProvider trpcUrl="http://localhost:3000/api/trpc">
-      <Outlet />
-    </TanstackTrpcProvider>
-  ),
+  component: () => <Outlet />,
 });

apps/web-tanstack/src/routes/index.tsx

@@ -1,6 +1,4 @@
 import { createFileRoute } from "@tanstack/react-router";
-import { useQuery } from "@tanstack/react-query";
-import { useTRPC } from "@repo/core-trpc";
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export const Route = createFileRoute("/" as any)({
@@ -8,35 +6,8 @@ export const Route = createFileRoute("/" as any)({
 });
 
 function Home() {
-  const trpc = useTRPC();
-  const siteSettings = useQuery(trpc.marketingPages.siteSettings.queryOptions({}));
-  const header = useQuery(trpc.navigation.header.queryOptions({}));
-
-  if (siteSettings.isPending || header.isPending) {
-    return <main>Loading…</main>;
-  }
-  if (siteSettings.error || header.error) {
-    return (
-      <main>
-        Failed to load: {siteSettings.error?.message ?? header.error?.message}
-      </main>
-    );
-  }
-
   return (
     <main>
-      <header>
-        <h1>{siteSettings.data?.siteName} — TanStack edition</h1>
-        <nav>
-          <ul>
-            {header.data?.items.map((item) => (
-              <li key={item.href}>
-                <a href={item.href}>{item.label}</a>
-              </li>
-            ))}
-          </ul>
-        </nav>
-      </header>
       <p>This page is rendered by TanStack Router and consumes the same feature packages as the Next.js app.</p>
     </main>
   );