Use marked module for some Markdown processing

web/js/markdown.js

@@ -0,0 +1,65 @@
+export function buildIssueMarkdownDocument(payload) {
+    const lines = [];
+    lines.push('---');
+    lines.push(`type: ${payload.type}`);
+    lines.push(`product: ${payload.product}`);
+    lines.push(`version: ${payload.version}`);
+    lines.push('---');
+    lines.push('');
+
+    if (!payload.issues || payload.issues.length === 0) {
+        lines.push('_No issues_');
+        lines.push('');
+        return lines.join('\n');
+    }
+
+    payload.issues.forEach(issue => {
+        lines.push(`## ${issue.id}`);
+        lines.push('');
+
+        if (issue.caveat) {
+            lines.push('```caveat');
+            lines.push(issue.caveat);
+            lines.push('```');
+            lines.push('');
+        }
+
+        getIssueDescriptionParagraphs(issue.description).forEach(paragraph => {
+            lines.push(paragraph);
+            lines.push('');
+        });
+
+        if (Array.isArray(issue.platforms) && issue.platforms.length > 0) {
+            lines.push(`Platforms: ${issue.platforms.join(', ')}`);
+            lines.push('');
+        }
+    });
+
+    return lines.join('\n');
+}
+
+export function stripMarkdownFrontmatter(markdownText) {
+    const input = String(markdownText || '').replace(/^\uFEFF/, '');
+    const lines = input.split(/\r?\n/);
+
+    if (lines[0] !== '---') {
+        return input;
+    }
+
+    for (let i = 1; i < lines.length; i++) {
+        if (lines[i] === '---') {
+            return lines.slice(i + 1).join('\n').replace(/^\n+/, '');
+        }
+    }
+
+    return input;
+}
+
+function getIssueDescriptionParagraphs(description) {
+    const paragraphs = String(description || '')
+        .split(/\n{2,}/)
+        .map(text => text.trim())
+        .filter(Boolean);
+
+    return paragraphs.length > 0 ? paragraphs : [''];
+}