feat(27-03): remove hero section from landing page

- Delete HeroSection function (Discover Gear heading, search bar, Go to Collection link)
- Remove unused imports: Link, Search (lucide-react), useAuth, useUIStore
- LandingPage now starts directly with PopularSetupsSection
- Search now exclusively in TopNav bar

src/client/routes/index.tsx

@@ -1,30 +1,19 @@
-import { createFileRoute, Link } from "@tanstack/react-router";
-import { Search } from "lucide-react";
+import { createFileRoute } from "@tanstack/react-router";
 import { GlobalItemCard } from "../components/GlobalItemCard";
 import { PublicSetupCard } from "../components/PublicSetupCard";
-import { useAuth } from "../hooks/useAuth";
 import {
 	useDiscoveryCategories,
 	useDiscoveryItems,
 	useDiscoverySetups,
 } from "../hooks/useDiscovery";
-import { useUIStore } from "../stores/uiStore";
 
 export const Route = createFileRoute("/")({
 	component: LandingPage,
 });
 
 function LandingPage() {
-	const { data: auth } = useAuth();
-	const isAuthenticated = !!auth?.user;
-	const openCatalogSearch = useUIStore((s) => s.openCatalogSearch);
-
 	return (
 		<div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-12">
-			<HeroSection
-				isAuthenticated={isAuthenticated}
-				onSearchFocus={() => openCatalogSearch("collection")}
-			/>
 			<PopularSetupsSection />
 			<RecentItemsSection />
 			<TrendingCategoriesSection />
@@ -32,45 +21,6 @@ function LandingPage() {
 	);
 }
 
-function HeroSection({
-	isAuthenticated,
-	onSearchFocus,
-}: {
-	isAuthenticated: boolean;
-	onSearchFocus: () => void;
-}) {
-	return (
-		<div className="text-center mb-16">
-			<h1 className="text-3xl sm:text-4xl font-bold text-gray-900 mb-2">
-				Discover Gear
-			</h1>
-			<p className="text-gray-500 mb-8">Browse what other people carry</p>
-			<div
-				onClick={onSearchFocus}
-				onKeyDown={(e) => e.key === "Enter" && onSearchFocus()}
-				role="button"
-				tabIndex={0}
-				className="max-w-xl mx-auto flex items-center gap-3 px-4 py-3 bg-white rounded-xl border border-gray-200 hover:border-gray-300 cursor-pointer shadow-sm transition-all"
-			>
-				<Search className="w-5 h-5 text-gray-400 shrink-0" />
-				<span className="text-sm text-gray-400 flex-1 text-left">
-					Search the catalog...
-				</span>
-			</div>
-			{isAuthenticated && (
-				<div className="mt-4">
-					<Link
-						to="/collection"
-						className="text-sm text-gray-600 hover:text-gray-900 underline underline-offset-2 cursor-pointer"
-					>
-						Go to Collection
-					</Link>
-				</div>
-			)}
-		</div>
-	);
-}
-
 function PopularSetupsSection() {
 	const { data, isLoading } = useDiscoverySetups(6);
 	const setups = data?.items ?? [];