chore(scripts): generic way to build scripts (#829)

* chore: move core scripts

* chore: extract head scripts

assets/js/core/tabs.js

@@ -0,0 +1,57 @@
+(function () {
+  function updateGroup(container, index) {
+    const tabs = Array.from(container.querySelectorAll('.hextra-tabs-toggle'));
+    tabs.forEach((tab, i) => {
+      tab.dataset.state = i === index ? 'selected' : '';
+      if (i === index) {
+        tab.setAttribute('aria-selected', 'true');
+        tab.tabIndex = 0;
+      } else {
+        tab.removeAttribute('aria-selected');
+        tab.removeAttribute('tabindex');
+      }
+    });
+    const panelsContainer = container.parentElement.nextElementSibling;
+    if (!panelsContainer) return;
+    Array.from(panelsContainer.children).forEach((panel, i) => {
+      panel.dataset.state = i === index ? 'selected' : '';
+      if (i === index) {
+        panel.tabIndex = 0;
+      } else {
+        panel.removeAttribute('tabindex');
+      }
+    });
+  }
+
+  const syncGroups = document.querySelectorAll('[data-tab-group]');
+
+  syncGroups.forEach((group) => {
+    const key = encodeURIComponent(group.dataset.tabGroup);
+    const saved = localStorage.getItem('hextra-tab-' + key);
+    if (saved !== null) {
+      updateGroup(group, parseInt(saved, 10));
+    }
+  });
+
+  document.querySelectorAll('.hextra-tabs-toggle').forEach((button) => {
+    button.addEventListener('click', function (e) {
+      const container = e.target.parentElement;
+      const index = Array.from(container.querySelectorAll('.hextra-tabs-toggle')).indexOf(
+        e.target
+      );
+      
+      if (container.dataset.tabGroup) {
+        // Sync behavior: update all tab groups with the same name
+        const tabGroupValue = container.dataset.tabGroup;
+        const key = encodeURIComponent(tabGroupValue);
+        document
+          .querySelectorAll('[data-tab-group="' + tabGroupValue + '"]')
+          .forEach((grp) => updateGroup(grp, index));
+        localStorage.setItem('hextra-tab-' + key, index.toString());
+      } else {
+        // Non-sync behavior: update only this specific tab group
+        updateGroup(container, index);
+      }
+    });
+  });
+})();