Refine footnote paragraph splitting pattern

Agent-Logs-Url: https://github.com/ThisIs-Developer/Markdown-Viewer/sessions/6b8ce336-b6dc-4563-af82-e4353ea44c7f

Co-authored-by: ThisIs-Developer <109382325+ThisIs-Developer@users.noreply.github.com>

Author: Copilot

desktop-app/resources/js/script.js

@@ -321,7 +321,7 @@ document.addEventListener("DOMContentLoaded", function () {
   function renderDefinitionContent(content, options = {}) {
     const { appendHtml = "" } = options;
     const paragraphs = String(content || "")
-      .split(/\n[ \t]*\n/)
+      .split(/\n(?:[ \t]*\n)+/)
       .map((paragraph) => paragraph.trim())
       .filter(Boolean);
 

script.js

@@ -321,7 +321,7 @@ document.addEventListener("DOMContentLoaded", function () {
   function renderDefinitionContent(content, options = {}) {
     const { appendHtml = "" } = options;
     const paragraphs = String(content || "")
-      .split(/\n[ \t]*\n/)
+      .split(/\n(?:[ \t]*\n)+/)
       .map((paragraph) => paragraph.trim())
       .filter(Boolean);