feat: Self-host TinyMCE — switch CDN to /lib/tinymce/

Views/Slides/Create.cshtml

@@ -92,7 +92,7 @@
 }
 
 @section Scripts {
-    <script src="https://cdn.tiny.cloud/1/no-api-key/tinymce/6/tinymce.min.js" referrerpolicy="origin"></script>
+    <script src="/lib/tinymce/tinymce.min.js"></script>
     <script>
         document.getElementById('slideType').addEventListener('change', function () {
             document.getElementById('contentSection').style.display = this.value === '0' ? '' : 'none';
@@ -105,6 +105,7 @@
             if (tinymce.get('contentEditor')) return;
             tinymce.init({
                 selector: '#contentEditor', height: 500,
+                license_key: 'gpl',
                 menubar: 'file edit view insert format table',
                 plugins: 'advlist autolink lists link image charmap preview anchor searchreplace visualblocks code fullscreen insertdatetime media table help wordcount',
                 toolbar: 'undo redo | blocks | bold italic forecolor backcolor | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | image media table | removeformat code fullscreen',