fix: merge corbeille lists + bulk restore button in cleanup

- Single unified 'Corbeille' table replaces the two separate lists
  (stale/orphelin + restorable). Each row has a Statut column showing
  '↺ Restaurable' or 'Orphelin', plus a checkbox for bulk ops.

- Checkboxes on restorable rows carry data-restorable='1' attribute
  so the bulk JS can distinguish them.

- Bulk actions bar now has both 'Supprimer la sélection' and
  '↺ Restaurer la sélection' buttons. The restore button only appears
  when at least one restorable item is checked.

- New cleanupBulkRestore() JS function populates a dedicated hidden
  form and confirms before submitting. Only restorable items are sent.

- restore-trash.php refactored to handle both single (trash_file) and
  bulk (trash_files[]) inputs via a loop, accumulating restored/skipped
  counts and re-rendering the fragment on HTMX requests.

app/public/admin/actions/cleanup-stats-fragment.php

@@ -32,9 +32,11 @@ $fpMeta = $fpStale . ' dossier' . ($fpStale > 1 ? 's' : '');
 if ($fpStale > 0) {
     $fpMeta .= ' · ' . ($d['filepond_stale_human'] ?? '');
 }
-$trMeta = $trStale . ' fichier' . ($trStale > 1 ? 's' : '');
-if ($trStale > 0) {
-    $trMeta .= ' · ' . ($d['trash_stale_human'] ?? '');
+$trMeta = ($trStale + $trActive) . ' fichier' . (($trStale + $trActive) > 1 ? 's' : '');
+$trTotalSize = ($d['trash_stale_size'] ?? 0) + ($d['trash_active_size'] ?? 0);
+$trTotalHuman = humanBytes($trTotalSize);
+if (($trStale + $trActive) > 0) {
+    $trMeta .= ' · ' . $trTotalHuman;
 }
 ?>
 <?php if ($totalStale === 0 && $totalFiles === 0): ?>
@@ -45,6 +47,9 @@ if ($trStale > 0) {
 <div id="cleanup-bulk-actions" class="admin-bulk-actions" style="display:none">
     <strong><span id="cleanup-selected-count">0</span> fichier(s) sélectionné(s)</strong>
     <div class="admin-bulk-btns">
+        <button type="button" class="btn btn--sm" onclick="cleanupBulkRestore()" id="cleanup-bulk-restore-btn" style="display:none">
+            ↺ Restaurer la sélection
+        </button>
         <button type="button" class="btn btn--sm btn--red" onclick="cleanupBulkDelete()">
             <?= icon('trash') ?> Supprimer la sélection
         </button>
@@ -62,6 +67,17 @@ if ($trStale > 0) {
     <div id="cleanup-bulk-checkboxes"></div>
 </form>
 
+<!-- Hidden bulk restore form -->
+<form id="cleanup-bulk-restore-form" method="post" action="/admin/actions/restore-trash.php"
+      hx-post="/admin/actions/restore-trash.php"
+      hx-target="#tmp-cleanup-stats-wrapper"
+      hx-swap="innerHTML"
+      hx-indicator="#tmp-cleanup-stats-wrapper"
+      style="display:none">
+    <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
+    <div id="cleanup-bulk-restore-checkboxes"></div>
+</form>
+
 <?php if ($fpStale > 0): ?>
     <h3 id="tmp-filepond-heading">Téléversements abandonnés <span class="n-meta"><?= htmlspecialchars($fpMeta) ?></span></h3>
     <table class="n-table" aria-labelledby="tmp-filepond-heading">
@@ -91,60 +107,44 @@ if ($trStale > 0) {
     </table>
 <?php endif; ?>
 
-<?php if ($trStale > 0): ?>
-    <h3 id="tmp-trash-heading">Corbeille (à nettoyer) <span class="n-meta"><?= htmlspecialchars($trMeta) ?></span></h3>
-    <table class="n-table" aria-labelledby="tmp-trash-heading">
-        <thead><tr><th width="1%"><input type="checkbox" onchange="cleanupToggleAll(this, 'trash')" title="Tout sélectionner"></th><th>Nom</th><th>Taille</th><th>Âge</th><th width="1%"></th></tr></thead>
-        <tbody>
-        <?php foreach ($d['trash_stale_files'] as $f): ?>
-            <tr>
-                <td><input type="checkbox" name="trash_files[]" value="<?= htmlspecialchars($f['name']) ?>" data-cleanup-group="trash" onchange="cleanupUpdateBulk()"></td>
-                <td><strong><?= htmlspecialchars($f['name']) ?></strong></td>
-                <td style="white-space:nowrap"><?= htmlspecialchars($f['human']) ?></td>
-                <td style="white-space:nowrap">~<?= (int)$f['age_days'] ?> j</td>
-                <td style="white-space:nowrap">
-                    <button type="button" class="btn btn--sm btn--danger" style="font-size:0.85em;padding:2px var(--space-xs)"
-                            hx-post="/admin/actions/cleanup-tmp.php"
-                            hx-confirm="Supprimer définitivement ce fichier de la corbeille ?"
-                            hx-vals='{"csrf_token":"<?= htmlspecialchars($_SESSION['csrf_token']) ?>","trash_file":"<?= htmlspecialchars($f['name']) ?>"}'
-                            hx-target="#tmp-cleanup-stats-wrapper"
-                            hx-swap="innerHTML"
-                            hx-indicator="#tmp-cleanup-stats-wrapper">
-                        <?= icon('trash') ?>
-                        Supprimer
-                    </button>
-                </td>
-            </tr>
-        <?php endforeach; ?>
-        </tbody>
-    </table>
-<?php endif; ?>
-
 <?php
-$trActiveFiles = $d['trash_active_files'] ?? [];
-if (!empty($trActiveFiles)):
-    $trActiveMeta = $trActive . ' fichier' . ($trActive > 1 ? 's' : '');
-    if ($trActive > 0) {
-        $trActiveMeta .= ' · ' . ($d['trash_active_human'] ?? '');
-    }
-?>
-    <h3 id="tmp-trash-restore-heading">Corbeille (restaurable) <span class="n-meta"><?= htmlspecialchars($trActiveMeta) ?></span></h3>
-    <p style="font-size:0.85em;color:var(--text-secondary);margin:0 0 var(--space-sm)">
-        Fichiers récemment supprimés pour lesquels le TFE associé existe encore. Vous pouvez les restaurer ou les supprimer définitivement.
-    </p>
-    <table class="n-table" aria-labelledby="tmp-trash-restore-heading">
-        <thead><tr><th>Nom</th><th>Taille</th><th>Âge</th><th>Origine</th><th width="1%"></th></tr></thead>
+// ── Merge stale + active trash files into a single list for display ─────
+// stale = orphaned (no sidecar, or too old); active = restorable (has sidecar)
+$allTrashFiles = [];
+foreach (($d['trash_active_files'] ?? []) as $f) {
+    $f['_restorable'] = true;
+    $f['_stale'] = false;
+    $allTrashFiles[] = $f;
+}
+foreach (($d['trash_stale_files'] ?? []) as $f) {
+    $f['_restorable'] = false;
+    $f['_stale'] = true;
+    $f['has_sidecar'] = false;
+    $f['original_name'] = '';
+    $f['file_type'] = '';
+    $allTrashFiles[] = $f;
+}
+$hasTrash = !empty($allTrashFiles);
+if ($hasTrash): ?>
+    <h3 id="tmp-trash-heading">Corbeille <span class="n-meta"><?= htmlspecialchars($trMeta) ?></span></h3>
+    <table class="n-table" aria-labelledby="tmp-trash-heading">
+        <thead><tr><th width="1%"><input type="checkbox" onchange="cleanupToggleAll(this, 'trash')" title="Tout sélectionner"></th><th>Nom</th><th>Taille</th><th>Âge</th><th>Statut</th><th width="1%"></th></tr></thead>
         <tbody>
-        <?php foreach ($trActiveFiles as $f): ?>
-            <tr>
+        <?php foreach ($allTrashFiles as $f): ?>
+            <tr<?= $f['_restorable'] ? ' class="trash-restorable-row"' : '' ?>>
+                <td><input type="checkbox" name="trash_files[]" value="<?= htmlspecialchars($f['name']) ?>" data-cleanup-group="trash"<?= $f['_restorable'] ? ' data-restorable="1"' : '' ?> onchange="cleanupUpdateBulk()"></td>
                 <td><strong><?= htmlspecialchars($f['name']) ?></strong></td>
                 <td style="white-space:nowrap"><?= htmlspecialchars($f['human']) ?></td>
                 <td style="white-space:nowrap">~<?= (int)$f['age_days'] ?> j</td>
-                <td style="font-size:0.85em;color:var(--text-secondary)">
-                    <?= $f['has_sidecar'] ? htmlspecialchars($f['original_name'] ?? '?') . ' (' . htmlspecialchars($f['file_type'] ?? '?') . ')' : 'métadonnées indisponibles' ?>
+                <td>
+                    <?php if ($f['_restorable']): ?>
+                    <span style="font-size:0.85em;color:var(--accent-green)" title="<?= htmlspecialchars($f['original_name'] ?? '') ?>">↺ Restaurable</span>
+                    <?php else: ?>
+                    <span style="font-size:0.85em;color:var(--text-secondary)">Orphelin</span>
+                    <?php endif; ?>
                 </td>
                 <td style="white-space:nowrap">
-                    <?php if ($f['has_sidecar']): ?>
+                    <?php if ($f['_restorable']): ?>
                     <button type="button" class="btn btn--sm"
                             style="font-size:0.85em;padding:2px var(--space-xs);margin-right:4px"
                             hx-post="/admin/actions/restore-trash.php"