fix: consistent handling of markdown between post preview and preview server

src/renderer/components/Editor/Editor.tsx

@@ -19,6 +19,7 @@ import { AutoSaveManager, getContrastColor } from '../../utils';
 import { parseMacros, getMacro } from '../../macros/registry';
 import { InsertModal } from '../InsertModal';
 import { AISuggestionsModal, AISuggestions } from '../AISuggestionsModal/AISuggestionsModal';
+import { marked } from 'marked';
 import './Editor.css';
 
 /** Get display name for media: prefer title over originalName */
@@ -134,7 +135,7 @@ const renderMacroSync = (name: string, params: Record<string, string>, postId?:
 };
 
 // Simple markdown to HTML converter for preview
-const markdownToHtml = (markdown: string, postId?: string): string => {
+export const markdownToHtml = (markdown: string, postId?: string): string => {
   // First, render macros
   const macros = parseMacros(markdown);
   let result = markdown;
@@ -145,33 +146,12 @@ const markdownToHtml = (markdown: string, postId?: string): string => {
     const rendered = renderMacroSync(macro.name, macro.params, postId);
     result = result.slice(0, macro.start) + rendered + result.slice(macro.end);
   }
-  
-  return result
-    // Escape HTML (but not our rendered macros - they're already safe)
-    // We need to be careful here - macro output contains HTML
-    // For safety, we skip escaping since we control the macro output
-    // Headers
-    .replace(/^### (.*$)/gim, '<h3>$1</h3>')
-    .replace(/^## (.*$)/gim, '<h2>$1</h2>')
-    .replace(/^# (.*$)/gim, '<h1>$1</h1>')
-    // Bold
-    .replace(/\*\*(.*?)\*\*/gim, '<strong>$1</strong>')
-    // Italic
-    .replace(/\*(.*?)\*/gim, '<em>$1</em>')
-    // Images
-    .replace(/!\[(.*?)\]\((.*?)\)/gim, '<img alt="$1" src="$2" style="max-width: 100%;" />')
-    // Links
-    .replace(/\[(.*?)\]\((.*?)\)/gim, '<a href="$2" target="_blank">$1</a>')
-    // Code blocks
-    .replace(/```([\s\S]*?)```/gim, '<pre><code>$1</code></pre>')
-    // Inline code
-    .replace(/`(.*?)`/gim, '<code>$1</code>')
-    // Blockquotes
-    .replace(/^\> (.*$)/gim, '<blockquote>$1</blockquote>')
-    // Horizontal rules
-    .replace(/^---$/gim, '<hr />')
-    // Line breaks
-    .replace(/\n/g, '<br />');
+
+  return marked.parse(result, {
+    gfm: true,
+    breaks: false,
+    async: false,
+  }) as string;
 };
 
 /**

tests/renderer/components/EditorMarkdownPreview.test.ts

@@ -0,0 +1,21 @@
+import { describe, it, expect } from 'vitest';
+import { markdownToHtml } from '../../../src/renderer/components/Editor/Editor';
+
+describe('Editor markdown preview rendering', () => {
+  it('renders continuous blockquote lines as a single blockquote paragraph (CommonMark softbreak behavior)', () => {
+    const markdown = [
+      '> Georg Bauer',
+      '> Am Krug 40',
+      '> 48151 Münster',
+      '> eMail: gb at rfc1437.de',
+    ].join('\n');
+
+    const html = markdownToHtml(markdown, 'post-1');
+
+    expect((html.match(/<blockquote>/g) ?? []).length).toBe(1);
+    expect((html.match(/<p>/g) ?? []).length).toBe(1);
+    expect(html).not.toContain('<br');
+    expect(html).toContain('Georg Bauer');
+    expect(html).toContain('eMail: gb at rfc1437.de');
+  });
+});