add api headermenu and crud management

controllers/headerController.js

@@ -1,4 +1,24 @@
 const Header = require("../models/header");
+const HeaderMenu = require("../models/HeaderMenu");
+
+/**
+ * Helper function to build a tree structure (Mirroring logic in headerMenuController)
+ */
+const buildTree = (items, parentId = null) => {
+    const branch = [];
+    const children = items.filter(item => 
+        String(item.parentId) === String(parentId) || (item.parentId === null && parentId === null)
+    );
+
+    for (const child of children) {
+        const item = child.toObject ? child.toObject() : { ...child };
+        const subChildren = buildTree(items, item._id);
+        item.children = subChildren.length > 0 ? subChildren : [];
+        branch.push(item);
+    }
+
+    return branch.sort((a, b) => a.order - b.order);
+};
 
 // Admin: Render header management page
 exports.index = async (req, res) => {
@@ -30,11 +50,23 @@ exports.index = async (req, res) => {
                   logo: "",
               };
 
+        const activeTab = req.query.tab || "topbar";
+        
+        // Always fetch menu items to ensure they are available even if the user
+        // switches tabs client-side
+        const items = await HeaderMenu.find().sort({ order: 1 });
+        const menuData = {
+            flat: items,
+            tree: buildTree(items)
+        };
+
         res.render("admin/header/index", {
             layout: "layouts/main",
             title: "Header Management",
-            user: req.session.user,
+            user: req.session.user || null,
             data: data,
+            activeTab: activeTab,
+            menuData: menuData
         });
     } catch (error) {
         console.error("Error loading header management:", error);