feat: file browser + relink for orphaned files + htmx fix + header cleanup + fix relinked FilePond integration + resolve acces.php conflict markers

app/templates/partials/form/file-browser-fragment.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * file-browser-fragment.php
+ *
+ * Shared dialog modal for the relink file browser.
+ * Included by the edit form only (admin mode, edit context).
+ *
+ * Expected variables:
+ *   (none — the modal is self-contained and uses hx-get for its content)
+ */
+?>
+<dialog id="relink-modal" class="relink-modal">
+    <div class="relink-modal-header">
+        <h3>Relier un fichier existant</h3>
+        <button type="button" class="btn btn--sm btn--ghost"
+                onclick="document.getElementById('relink-modal').close()"
+                aria-label="Fermer">✕</button>
+    </div>
+    <div id="relink-modal-body">
+        <p class="file-browser-loading">Chargement du navigateur de fichiers…</p>
+    </div>
+    <div class="relink-modal-footer">
+        <small>Seuls les fichiers déjà présents dans storage/documents/ ou storage/theses/ sont listés.</small>
+    </div>
+</dialog>