added arrows to jump parts

public/userarea/modal_partsTable.php

@@ -2,7 +2,24 @@
     <div class="modal-dialog modal-xl" style="max-width: 95vw !important;">
         <div class="modal-content">
             <div class="modal-header">
-                <h5 class="modal-title" id="partsModalLabel">Parti per TRF: <span id="trfHeader"></span></h5>
+                <h5 class="modal-title" id="partsModalLabel">
+                    Parti per TRF:
+                    <span id="trfHeader"></span>
+                </h5>
+
+                <div class="ms-auto me-3 d-flex align-items-center gap-2">
+                    <button type="button" class="btn btn-outline-secondary btn-sm" id="prevPartsRecordBtn" title="Record precedente">
+                        <i class="fas fa-chevron-left"></i>
+                    </button>
+
+                    <span id="partsRecordCounter" class="text-muted" style="font-size: 12px; min-width: 70px; text-align: center;">
+                        -
+                    </span>
+
+                    <button type="button" class="btn btn-outline-secondary btn-sm" id="nextPartsRecordBtn" title="Record successivo">
+                        <i class="fas fa-chevron-right"></i>
+                    </button>
+                </div>
                 <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
             </div>
             <div class="modal-body">