round15: manuelle Aenderungen nicht mehr nachfragen, 7-Tage-Schwelle fuer verschwundene Geraete, Icon-Buttons mit Tooltip, fixierte mobile Kopfleiste, Scroll-to-top-Button

apps/frontend/src/routes/admin/BookmarksPage.tsx

@@ -260,12 +260,8 @@ function EditForm({ bookmark, onDone }: { bookmark: Bookmark; onDone: () => void
             />
           </div>
           <div className="flex items-center gap-2">
-            <Button size="sm" variant="primary" onClick={() => mutation.mutate()} disabled={mutation.isPending}>
-              Speichern
-            </Button>
-            <Button size="sm" variant="ghost" onClick={onDone}>
-              Abbrechen
-            </Button>
+            <Button size="icon" variant="primary" onClick={() => mutation.mutate()} disabled={mutation.isPending} title="Speichern" aria-label="Speichern">💾</Button>
+            <Button size="icon" variant="ghost" onClick={onDone} title="Abbrechen" aria-label="Abbrechen">✕</Button>
             {mutation.isError ? (
               <span className="text-xs text-red-500">{(mutation.error as Error).message}</span>
             ) : null}
@@ -358,12 +354,8 @@ function BookmarkRow({
       </td>
       <td className="px-4 py-3">
         <div className="flex items-center justify-end gap-2">
-          <Button size="sm" onClick={() => setEditing(true)}>
-            Bearbeiten
-          </Button>
-          <Button size="sm" variant="danger" onClick={() => deleteMutation.mutate()} disabled={deleteMutation.isPending}>
-            Löschen
-          </Button>
+          <Button size="icon" onClick={() => setEditing(true)} title="Bearbeiten" aria-label="Bearbeiten">✏️</Button>
+          <Button size="icon" variant="danger" onClick={() => deleteMutation.mutate()} disabled={deleteMutation.isPending} title="Löschen" aria-label="Löschen">🗑️</Button>
         </div>
       </td>
     </tr>