Fix inline MathJax delimiters and revert unintended resource diffs

Agent-Logs-Url: https://github.com/ThisIs-Developer/Markdown-Viewer/sessions/25e889c7-d501-4e74-9e49-01839bcf0feb

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

Author: Copilot

desktop-app/resources/index.html

@@ -45,6 +45,15 @@
     <script src="https://cdnjs.cloudflare.com/ajax/libs/dompurify/3.0.9/purify.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2.0.5/FileSaver.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/html2pdf.js/0.10.1/html2pdf.bundle.min.js"></script>
+    <script>
+      window.MathJax = {
+        tex: {
+          inlineMath: [['$', '$'], ['\\(', '\\)']],
+          displayMath: [['$$', '$$'], ['\\[', '\\]']],
+          processEscapes: true
+        }
+      };
+    </script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/mermaid@11.6.0/dist/mermaid.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/emoji-toolkit@9.0.1/lib/js/joypixels.min.js"></script>