canvas feature

public/js/modules/markdown.js

@@ -80,6 +80,10 @@ export function renderMd(src) {
     });
 
     processed = processed
+        // ASCII canvas block: ```ascii
+        .replace(/```ascii\s*\n([\s\S]*?)(?:```|$)/g, (_, content) => {
+            return `<pre class="ascii-art">${esc(content.replace(/\s+$/, ''))}</pre>`;
+        })
         // Gallery fenced block: ```gallery
         .replace(/```gallery\s*\n([\s\S]*?)(?:```|$)/g, (_, content) => {
             const imgs = [];