ui: command palette (Cmd/Ctrl+K) m. build-time soegeindeks, vanilla JS

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/layouts/Base.astro

@@ -3,6 +3,7 @@ import { ClientRouter } from 'astro:transitions';
 import Head from '../components/Head.astro';
 import Header from '../components/Header.astro';
 import Footer from '../components/Footer.astro';
+import Palette from '../components/Palette.astro';
 import { SITE } from '../consts';
 import '../styles/global.css';
 interface Props {
@@ -50,5 +51,6 @@ const { title, description, image, type, publishedTime, modifiedTime, tags, json
       <slot />
     </main>
     <Footer />
+    <Palette />
   </body>
 </html>