fixes + theme

public/plugins/slideshow/slideshow.js

@@ -306,6 +306,31 @@ if (groupBar) {
     injectGroupBarButton();
 }
 
+// ── Detail-view sidebar button (shown when browsing a group card) ──
+
+function injectDetailSidebarButton() {
+    const sidebar = $('detail-sidebar');
+    if (!sidebar) return;
+    if (sidebar.querySelector('.slideshow-present-btn')) return;
+    // Sidebar header is the first direct child div
+    const header = sidebar.firstElementChild;
+    if (!header) return;
+    const btn = document.createElement('button');
+    btn.className = 'slideshow-present-btn slideshow-present-btn-sidebar';
+    btn.type = 'button';
+    btn.title = 'present this group';
+    btn.innerHTML = '<i class="ph ph-projector-screen text-sm"></i>';
+    btn.addEventListener('click', async (e) => {
+        e.stopPropagation();
+        const pid = sidebar.dataset.groupId;
+        if (pid) await startPresentationForGroup(pid);
+    });
+    header.appendChild(btn);
+}
+
+if ($('detail-sidebar')) injectDetailSidebarButton();
+else document.addEventListener('DOMContentLoaded', injectDetailSidebarButton, { once: true });
+
 // ── Hotspot editor ───────────────────────────────────────────────
 
 const ed = {