feat: add meta for config pages

src/routes/config/chords/+page.svelte

@@ -87,7 +87,8 @@
 </script>
 
 <svelte:head>
-  <title>Chord Manager</title>
+  <title>Chord Manager - CharaChorder Device Manager</title>
+  <meta name="description" content="Manage your chords" />
 </svelte:head>
 
 <div class="search-container">

src/routes/config/layout/+page.svelte

@@ -49,6 +49,11 @@
   setContext("active-layer", writable(0))
 </script>
 
+<svelte:head>
+  <title>Layout Manager - CharaChorder Device Manager</title>
+  <meta name="description" content="Edit your layout" />
+</svelte:head>
+
 <svelte:window use:share={shareLayout} />
 
 <section>

src/routes/config/settings/+page.svelte

@@ -6,6 +6,11 @@
   import ResetPopup from "./ResetPopup.svelte"
 </script>
 
+<svelte:head>
+  <title>Device Settings - CharaChorder Device Manager</title>
+  <meta name="description" content="Change your device's settings" />
+</svelte:head>
+
 {#if $serialPort}
   <form>
     <fieldset>