Revert to static JS site (Svelte built, but no CSR); Optimize images

src/routes/+page.svelte

@@ -29,16 +29,6 @@
             addressCountry: 'US',
         },
     };
-
-    let showPicture = $state<MediaItem | null>(null);
-
-    const showLightbox = (item: MediaItem) => {
-        showPicture = item;
-    };
-
-    const onClose = () => {
-        showPicture = null;
-    };
 </script>
 
 <svelte:head>
@@ -77,12 +67,14 @@
     {@html `<script type="application/ld+json">${JSON.stringify(jsonLd)}</script>`}
 </svelte:head>
 
-<SiteHeader />
+<SiteHeader
+    tourCaption={data.mediaItems.find((m) => m.name === 'tour')?.caption}
+/>
 <main>
     <section id="gallery" class="gallery-grid">
         {#each data.mediaItems as item, index (item.name)}
-            <GalleryFigure {item} {index} {showLightbox} />
+            <GalleryFigure {item} {index} />
         {/each}
     </section>
 </main>
-<Lightbox item={showPicture} {onClose} />
+<Lightbox />