feat: Implement desktop-only mode for the ASCII art generator and sidebar, update breakpoints to 1600px, and simplify the blog page layout with a new back link.

src/pages/blog/[slug].astro

@@ -1,7 +1,6 @@
 ---
 import { getEntry } from "astro:content";
 import Layout from "../../layouts/Layout.astro";
-import Sidebar from "../../components/Sidebar.astro";
 
 const { slug } = Astro.params;
 if (!slug) {
@@ -19,8 +18,6 @@ const { Content } = await entry.render();
 
 <Layout title={entry.data.title}>
     <div class="split-layout">
-        <Sidebar />
-
         <main class="content-workspace">
             <div class="content-container">
                 <article class="h-entry">
@@ -76,7 +73,6 @@ const { Content } = await entry.render();
         position: relative;
         display: flex;
         flex-direction: column;
-        background: #050505;
         overflow-y: auto;
         overflow-x: hidden;
     }