fix image

site/src/components/ActivityDetail.svelte

@@ -70,7 +70,17 @@
     return DOMPurify.sanitize(marked(rawDescription, { renderer }) as string);
   })();
 
-  $: imageBase = `${base}data/activities/images/${activity.id}/`;
+  // Derive image dir from detail_url so multi-user paths resolve correctly.
+  // "dave/_merged/activities/foo.json" → "/data/dave/_merged/activities/images/{id}/"
+  $: imageBase = (() => {
+    const du = activity.detail_url ?? '';
+    const dir = du.startsWith('http')
+      ? du.substring(0, du.lastIndexOf('/') + 1)
+      : du.includes('/')
+        ? `${base}data/${du.substring(0, du.lastIndexOf('/') + 1)}`
+        : `${base}data/activities/`;
+    return `${dir}images/${activity.id}/`;
+  })();
   $: galleryImages = (detail?.custom as any)?.images as string[] ?? [];
 
 

site/src/layouts/Base.astro

@@ -155,6 +155,8 @@ try {
       <a href={baseUrl} class="font-bold text-white tracking-tight hover:text-[--accent] transition-colors">
         Bincio<span class="text-[--accent]">Activity</span>
       </a>
+      {!isPublicPage && (
+        <>
           <!-- Feed tab: only shown for multi-user (more than one shard) -->
           {!singleHandle && (
             <a href={baseUrl} class="text-sm text-zinc-400 hover:text-white transition-colors">Feed</a>
@@ -173,8 +175,12 @@ try {
           {mobileApp && (
             <a href={`${baseUrl}convert/`} class="text-sm text-zinc-400 hover:text-white transition-colors">Convert</a>
           )}
+        </>
+      )}
 
       <div class="ml-auto flex items-center gap-1">
+        {!isPublicPage && (
+          <>
             <!-- Logout button — hidden until logged in -->
             <button
               id="nav-logout"
@@ -190,6 +196,8 @@ try {
                 title="Upload activity"
               >↑</button>
             )}
+          </>
+        )}
         <button
           id="theme-toggle"
           class="text-zinc-400 hover:text-white transition-colors w-8 h-8 flex items-center justify-center rounded-md hover:bg-zinc-800 text-base"