add item to the dropdown menu

Asset/js/relocate.js

@@ -0,0 +1,57 @@
+/*
+ * BulkMoveTasks -- place the "Move tasks in bulk" entry inside the native column menu.
+ *
+ * Kanboard only exposes the template:board:column:dropdown hook AFTER the column menu
+ * <ul>, and its dropdown JS clones just that <ul> when the menu opens. So the hook item
+ * cannot reach the menu on its own. The column_dropdown.php template renders the item
+ * hidden next to the menu; this script moves each such item into that column's real <ul>
+ * so it appears alongside "Hide this column", "Create tasks in bulk", etc.
+ *
+ * It re-runs when the board is redrawn (AJAX polling / drag-and-drop refresh).
+ */
+(function () {
+    "use strict";
+
+    function relocate() {
+        var items = document.querySelectorAll(".bulkmovetasks-menu-item");
+
+        for (var i = 0; i < items.length; i++) {
+            var li = items[i];
+
+            // Already moved into a menu list: just make sure it is visible.
+            if (li.closest("ul")) {
+                li.style.display = "";
+                continue;
+            }
+
+            // The hook renders the item as a child of the column's dropdown wrapper;
+            // its first <ul> is the native menu.
+            var menu = li.parentNode ? li.parentNode.querySelector("ul") : null;
+
+            if (menu) {
+                menu.appendChild(li);
+                li.style.display = "";
+            }
+        }
+    }
+
+    function init() {
+        if (!document.getElementById("board")) {
+            return;
+        }
+
+        relocate();
+
+        var container = document.getElementById("board-container");
+
+        if (container && window.MutationObserver) {
+            new MutationObserver(relocate).observe(container, { childList: true, subtree: true });
+        }
+    }
+
+    if (document.readyState === "loading") {
+        document.addEventListener("DOMContentLoaded", init);
+    } else {
+        init();
+    }
+})();

Plugin.php

@@ -8,9 +8,14 @@ class Plugin extends Base
 {
     public function initialize()
     {
-        // Add a "Move all tasks to another column" entry to the board column
-        // header dropdown. The hook passes the current $column and $swimlane.
+        // Render the "Move tasks in bulk" entry. The only column hook sits outside the
+        // native menu <ul>, so column_dropdown.php renders it hidden and relocate.js
+        // moves it into the menu (passes the current $column and $swimlane).
         $this->template->hook->attach('template:board:column:dropdown', 'bulkMoveTasks:board/column_dropdown');
+
+        $this->hook->on('template:layout:js', array(
+            'template' => 'plugins/BulkMoveTasks/Asset/js/relocate.js',
+        ));
     }
 
     public function getPluginName()

Template/board/column_dropdown.php

@@ -1,6 +1,9 @@
 <?php if ($column['nb_tasks'] > 0 && $this->user->hasProjectAccess('TaskModificationController', 'update', $column['project_id'])): ?>
-    <li>
-        <?= $this->modal->medium('arrows-h', t('Move all tasks to another column'), 'BulkMoveController', 'show', array(
+    <?php /* Rendered here (outside the menu <ul>) by the only available hook, then moved
+             into the column's real dropdown <ul> by Asset/js/relocate.js so it sits next
+             to the native entries. Hidden until relocated to avoid a flash in the header. */ ?>
+    <li class="bulkmovetasks-menu-item" style="display: none;">
+        <?= $this->modal->medium('arrows-h', t('Move tasks in bulk'), 'BulkMoveController', 'show', array(
             'plugin' => 'BulkMoveTasks',
             'project_id' => $column['project_id'],
             'column_id' => $column['id'],