homepage: title → the hub tagline (was news-only)

<title> + og:title + twitter:title: 'Upbeat Bytes — calm, constructive news' →
'upbeatBytes — a calmer, brighter corner of the internet', matching the hub's own
svelte:head so crawlers and JS users see the same thing.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/app.html

@@ -8,15 +8,15 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <meta name="theme-color" content="#0083ad" />
     <meta name="description" content="A calmer, brighter corner of the internet: good news, daily art, small games, and little resets." />
-    <title>Upbeat Bytes — calm, constructive news</title>
+    <title>upbeatBytes — a calmer, brighter corner of the internet</title>
     <link rel="canonical" href="https://upbeatbytes.com/" />
     <meta property="og:site_name" content="Upbeat Bytes" />
     <meta property="og:type" content="website" />
-    <meta property="og:title" content="Upbeat Bytes — calm, constructive news" />
+    <meta property="og:title" content="upbeatBytes — a calmer, brighter corner of the internet" />
     <meta property="og:description" content="A calmer, brighter corner of the internet: good news, daily art, small games, and little resets. No ads, no paywalls, no doomscrolling." />
     <meta property="og:url" content="https://upbeatbytes.com/" />
     <meta name="twitter:card" content="summary" />
-    <meta name="twitter:title" content="Upbeat Bytes — calm, constructive news" />
+    <meta name="twitter:title" content="upbeatBytes — a calmer, brighter corner of the internet" />
     <meta name="twitter:description" content="A calmer, brighter corner of the internet: good news, daily art, small games, and little resets." />
     %sveltekit.head%
     <style>