Clean up cleanup dialog

- Remove duplicate 'Téléversements abandonnés' heading already communicated by the summary
- Replace #peertube-orphans-wrapper with display:contents wrapper so PeerTube details sit as direct grid siblings
- Add hx-confirm to all delete buttons (filepond, trash, PeerTube orphans)

app/templates/admin/index.php

@@ -41,7 +41,7 @@ document.addEventListener('htmx:afterSwap',()=>{document.querySelectorAll('input
                 <?php endif; ?>
                 <?php if ($tmpTotalCount > 0): ?>
                 <button type="button" class="btn btn--sm btn--secondary" id="tmp-cleanup-btn"
-                        onclick="document.getElementById('tmp-cleanup-dialog').showModal(); htmx.trigger('#tmp-cleanup-stats-wrapper','loadStats'); htmx.trigger('#peertube-orphans-wrapper','loadPeertube')">
+                        onclick="document.getElementById('tmp-cleanup-dialog').showModal(); htmx.trigger('#tmp-cleanup-stats-wrapper','loadStats'); htmx.trigger('#peertube-orphans-fragment','loadPeertube')">
                     <?= icon('trash') ?> Nettoyer (<?= $tmpTotalCount ?>)
                 </button>
                 <?php endif; ?>

app/templates/admin/partials/dialogs/tmp-cleanup.php

@@ -22,11 +22,11 @@
                 </details>
             </div>
             <!-- ═══════ PeerTube ═══════ -->
-            <div id="peertube-orphans-wrapper"
+            <div id="peertube-orphans-fragment" style="display:contents"
                  hx-get="/admin/actions/peertube-orphans-fragment.php"
                  hx-trigger="loadPeertube"
                  hx-swap="outerHTML"
-                 hx-indicator="#peertube-orphans-wrapper">
+                 hx-indicator="#peertube-orphans-fragment">
                 <p style="margin:0;color:var(--text-secondary)">Chargement…</p>
             </div>
         </div>