Update

public/admin/js/tinymce-branding-override.js

@@ -0,0 +1,31 @@
+// TinyMCE Branding Override
+// This script should be loaded after the main admin.js file
+
+(function() {
+    // Wait for TinyMCE to be available
+    if (typeof tinymce !== 'undefined') {
+        // Override the default branding setting for all future editors
+        const originalInit = tinymce.init;
+        tinymce.init = function(config) {
+            // Add branding: false to disable the "Powered by Tiny" text
+            config.branding = false;
+
+            // Also disable promotion if it exists
+            if (typeof config.promotion === 'undefined') {
+                config.promotion = false;
+            }
+
+            return originalInit.call(this, config);
+        };
+
+        // If there are already initialized editors, update them
+        if (tinymce.editors && tinymce.editors.length > 0) {
+            tinymce.editors.forEach(function(editor) {
+                if (editor.settings) {
+                    editor.settings.branding = false;
+                    editor.settings.promotion = false;
+                }
+            });
+        }
+    }
+})();