fix: drhider modal header sticky (v1.15)

site/templates/drhider.html

@@ -59,7 +59,7 @@
   .modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 1000; justify-content: center; align-items: flex-start; padding-top: 60px; }
   .modal-overlay.show { display: flex; }
   .modal { background: var(--card); border-radius: 12px; max-width: 600px; width: 90%; max-height: 80vh; overflow-y: auto; box-shadow: 0 8px 32px rgba(0,0,0,.15); }
-  .modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
+  .modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--card); z-index: 1; }
   .modal-header h2 { font-size: 16px; }
   .modal-close { cursor: pointer; font-size: 20px; color: var(--muted); background: none; border: none; line-height: 1; }
   .modal-close:hover { color: var(--fg); }
@@ -84,7 +84,7 @@
   <a href="https://contractor.pythonk8s.services.ngcloud.ru/">Сверка договоров</a>
   <span class="sep">|</span>
   <strong>DrHider</strong>
-  <span style="font-size:11px;color:var(--muted);">v1.14</span>
+  <span style="font-size:11px;color:var(--muted);">v1.15</span>
   <button class="help-btn" onclick="openModal()" title="О сервисе">?</button>
 </header>