nits: customise homepage title; add todo to word.astro layout for dynamic return navigation url computation

Author: babblebey

src/layouts/word.astro

@@ -1,4 +1,7 @@
 ---
+/**
+ * @todo Get URL of previous page (maybe from `referer`) and return there on Navigation back; good for browse page
+ */
 import BaseLayout from "./base.astro";
 import { getCollection } from "astro:content";
 import Navbar from "../components/navbar.astro";

src/pages/index.astro

@@ -7,7 +7,10 @@ import RecentSearches from "../components/islands/recent-searches.jsx";
 const dictionary = await getCollection("dictionary");
 ---
 
-<BaseLayout pageTitle="Dictionary">
+<BaseLayout 
+	pageTitle="Jargons.dev"
+	subtitle="Simplified Meaning & Definition to Technical Terms"
+>
 	<main class="flex flex-col max-w-screen-lg p-5 justify-center mx-auto min-h-screen">
 		<!-- Title -->
 		<div class="mb-4 md:mb-6">