fix(web): wire up inquiry modal toast notification on listing detail page

The "Nhắn tin" button's inquiry modal now shows a success toast via
sonner after submission instead of an in-dialog success state, and
closes the modal automatically. Added sonner as a dependency and
mounted <Toaster> in the root locale layout.

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

apps/web/package.json

@@ -28,6 +28,7 @@
     "react-hook-form": "^7.72.1",
     "recharts": "^3.8.1",
     "socket.io-client": "^4.8.3",
+    "sonner": "^2.0.7",
     "tailwind-merge": "^3.5.0",
     "web-vitals": "^5.2.0",
     "zod": "^4.3.6",