fix(sidebar): centrar labels (styles.css tenía mayor especificidad), preservar scroll al toggle

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

shared/components/sidebar.php

@@ -159,7 +159,7 @@ if (class_exists('ModuleRegistry', false)) {
 ?>
         <li class="sidebar-section<?= $_catHasActive ? ' has-active' : '' ?>"
             data-cat="<?= $catId ?>"
-            onclick="sbToggleCat('<?= $catId ?>', this)">
+            onclick="sbToggleCat('<?= $catId ?>',this,event)">
             <span class="sb-cat-label">
                 <i class="<?= htmlspecialchars($catData['icon'], ENT_QUOTES, 'UTF-8') ?> me-1"></i>
                 <?= htmlspecialchars($catData['label'], ENT_QUOTES, 'UTF-8') ?>
@@ -380,7 +380,11 @@ if (class_exists('ModuleRegistry', false)) {
         }
     }
 
-    window.sbToggleCat = function(catId, sectionEl) {
+    window.sbToggleCat = function(catId, sectionEl, ev) {
+        if (ev) { ev.preventDefault(); ev.stopPropagation(); }
+        var nav = document.getElementById('erp-sidebar');
+        var savedScroll = nav ? nav.scrollTop : 0;
+
         var group = document.getElementById(catId);
         if (!group) return;
         var isCollapsed = group.classList.contains('collapsed');
@@ -400,6 +404,9 @@ if (class_exists('ModuleRegistry', false)) {
             });
         }
         setCollapsed(arr);
+
+        // Restaurar scroll del sidebar para que no salte al top
+        if (nav) { requestAnimationFrame(function(){ nav.scrollTop = savedScroll; }); }
     };
 
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