feat(search-frontend): add public landing page, search page with map view, filters, and property cards

- Create (public) route group with landing page (hero, featured listings, district links, stats, CTA)
- Create search page with filter sidebar, list/map/split view modes, URL-synced filters, pagination
- Build ListingMap component with CSS-based marker visualization and popup details
- Build FilterBar with transaction type, property type, city, price range, area, bedrooms filters
- Build PropertyCard and SearchResults components with responsive grid layout
- Update middleware to allow public access to / and /search routes
- Move dashboard home to /dashboard to avoid route conflict
- All content in Vietnamese, mobile responsive

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/app/(dashboard)/dashboard/page.tsx

@@ -0,0 +1,54 @@
+import Link from 'next/link';
+import { Button } from '@/components/ui/button';
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+
+export default function DashboardPage() {
+  return (
+    <div className="space-y-8">
+      <div>
+        <h1 className="text-3xl font-bold">Bảng điều khiển</h1>
+        <p className="mt-2 text-muted-foreground">
+          Quản lý tin đăng bất động sản của bạn
+        </p>
+      </div>
+
+      <div className="grid gap-6 sm:grid-cols-2 lg:grid-cols-3">
+        <Card>
+          <CardHeader>
+            <CardTitle>Đăng tin mới</CardTitle>
+            <CardDescription>Tạo tin đăng bán hoặc cho thuê bất động sản</CardDescription>
+          </CardHeader>
+          <CardContent>
+            <Link href="/listings/new">
+              <Button className="w-full">Đăng tin ngay</Button>
+            </Link>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader>
+            <CardTitle>Tin đăng của tôi</CardTitle>
+            <CardDescription>Quản lý các tin đăng đã tạo</CardDescription>
+          </CardHeader>
+          <CardContent>
+            <Link href="/listings">
+              <Button variant="outline" className="w-full">Xem danh sách</Button>
+            </Link>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader>
+            <CardTitle>Tìm kiếm</CardTitle>
+            <CardDescription>Tìm bất động sản phù hợp nhu cầu</CardDescription>
+          </CardHeader>
+          <CardContent>
+            <Link href="/search">
+              <Button variant="outline" className="w-full">Tìm kiếm</Button>
+            </Link>
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  );
+}