Text pasting fix

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pulse-signage",
-  "version": "1.1.3",
+  "version": "1.1.5",
   "private": false,
   "description": "Pulse Signage application with MySQL and media uploads",
   "repository": {

src/web/public/js/slide-form.js

@@ -3,6 +3,7 @@ import {
   BlockQuote,
   Bold,
   ClassicEditor,
+  ClipboardPipeline,
   Essentials,
   FontBackgroundColor,
   FontColor,
@@ -142,6 +143,26 @@ import {
     }
   }
 
+  class ForcePlainTextPaste extends Plugin {
+    static get pluginName() {
+      return 'ForcePlainTextPaste';
+    }
+
+    static get requires() {
+      return [ClipboardPipeline];
+    }
+
+    init() {
+      var editor = this.editor;
+      var clipboardPipeline = editor.plugins.get(ClipboardPipeline);
+
+      this.listenTo(clipboardPipeline, 'inputTransformation', function (_event, data) {
+        var plainText = data.dataTransfer.getData('text/plain');
+        data.content = editor.data.processor.toView(plainTextToHtml(plainText));
+      }, { priority: 'high' });
+    }
+  }
+
   function escapeHtml(value) {
     return String(value ?? '')
       .replace(/&/g, '&')
@@ -151,6 +172,32 @@ import {
       .replace(/'/g, ''');
   }
 
+  function plainTextToHtml(value) {
+    var lines = String(value ?? '').replace(/\r\n?/g, '\n').split('\n');
+    var paragraphs = [];
+    var currentParagraph = [];
+
+    lines.forEach(function (line) {
+      if (line === '') {
+        if (currentParagraph.length) {
+          paragraphs.push('<p>' + currentParagraph.join('<br />') + '</p>');
+          currentParagraph = [];
+        } else {
+          paragraphs.push('<p></p>');
+        }
+        return;
+      }
+
+      currentParagraph.push(escapeHtml(line));
+    });
+
+    if (currentParagraph.length) {
+      paragraphs.push('<p>' + currentParagraph.join('<br />') + '</p>');
+    }
+
+    return paragraphs.length ? paragraphs.join('') : '<p></p>';
+  }
+
   function getTemplateById(id) {
     return templates.find(function (item) { return Number(item.id) === Number(id); }) || null;
   }
@@ -608,6 +655,7 @@ import {
           BlockQuote,
           Bold,
           Essentials,
+          ForcePlainTextPaste,
           FontBackgroundColor,
           FontColor,
           FontFamily,