fix: TipTap button conversion in card save flow

ROOT CAUSE:
When saving card edit in EmailBuilder, htmlToMarkdown() was called.
The old code at line 26 converted ALL <a> tags to markdown links:
  <a href="url">text</a> → [text](url)

This lost TipTap button data-button attributes, converting buttons
to plain text instead of [button:style](url)Text[/button] shortcode.

FIX:
Added TipTap button detection BEFORE generic link conversion in
html-to-markdown.ts:
- Detects <a data-button...> elements
- Extracts style from data-style or class attribute
- Extracts URL from data-href or href attribute
- Converts to [button:style](url)Text[/button] format

FLOW NOW WORKS:
1. User adds button via TipTap toolbar
2. TipTap renders <a data-button data-style="solid"...>
3. User clicks Save Changes
4. htmlToMarkdown detects data-button → [button:solid](url)Text[/button]
5. Card content saved with proper button shortcode
6. On re-edit, button shortcode converted back to TipTap button

admin-spa/src/lib/html-to-markdown.ts

@@ -5,26 +5,52 @@
 
 export function htmlToMarkdown(html: string): string {
   if (!html) return '';
-  
+
   let markdown = html;
-  
+
   // Headings
   markdown = markdown.replace(/<h1>(.*?)<\/h1>/gi, '# $1\n\n');
   markdown = markdown.replace(/<h2>(.*?)<\/h2>/gi, '## $1\n\n');
   markdown = markdown.replace(/<h3>(.*?)<\/h3>/gi, '### $1\n\n');
   markdown = markdown.replace(/<h4>(.*?)<\/h4>/gi, '#### $1\n\n');
-  
+
   // Bold
   markdown = markdown.replace(/<strong>(.*?)<\/strong>/gi, '**$1**');
   markdown = markdown.replace(/<b>(.*?)<\/b>/gi, '**$1**');
-  
+
   // Italic
   markdown = markdown.replace(/<em>(.*?)<\/em>/gi, '*$1*');
   markdown = markdown.replace(/<i>(.*?)<\/i>/gi, '*$1*');
-  
-  // Links
+
+  // TipTap buttons - detect by data-button attribute, BEFORE generic links
+  // Format: <a data-button data-style="solid" data-href="..." data-text="...">text</a>
+  // or: <a href="..." class="button..." data-button ...>text</a>
+  markdown = markdown.replace(/<a[^>]*data-button[^>]*>(.*?)<\/a>/gi, (match, text) => {
+    // Extract style from data-style or class
+    let style = 'solid';
+    const styleMatch = match.match(/data-style=["'](\w+)["']/);
+    if (styleMatch) {
+      style = styleMatch[1];
+    } else if (match.includes('button-outline') || match.includes('outline')) {
+      style = 'outline';
+    }
+
+    // Extract href from data-href or href attribute
+    let url = '#';
+    const dataHrefMatch = match.match(/data-href=["']([^"']+)["']/);
+    const hrefMatch = match.match(/href=["']([^"']+)["']/);
+    if (dataHrefMatch) {
+      url = dataHrefMatch[1];
+    } else if (hrefMatch) {
+      url = hrefMatch[1];
+    }
+
+    return `[button:${style}](${url})${text.trim()}[/button]`;
+  });
+
+  // Regular links (not buttons)
   markdown = markdown.replace(/<a\s+href="([^"]+)"[^>]*>(.*?)<\/a>/gi, '[$2]($1)');
-  
+
   // Lists
   markdown = markdown.replace(/<ul[^>]*>(.*?)<\/ul>/gis, (match, content) => {
     const items = content.match(/<li[^>]*>(.*?)<\/li>/gis) || [];
@@ -33,7 +59,7 @@ export function htmlToMarkdown(html: string): string {
       return `- ${text}`;
     }).join('\n') + '\n\n';
   });
-  
+
   markdown = markdown.replace(/<ol[^>]*>(.*?)<\/ol>/gis, (match, content) => {
     const items = content.match(/<li[^>]*>(.*?)<\/li>/gis) || [];
     return items.map((item: string, index: number) => {
@@ -41,24 +67,24 @@ export function htmlToMarkdown(html: string): string {
       return `${index + 1}. ${text}`;
     }).join('\n') + '\n\n';
   });
-  
+
   // Paragraphs - convert to double newlines
   markdown = markdown.replace(/<p[^>]*>(.*?)<\/p>/gis, '$1\n\n');
-  
+
   // Line breaks
   markdown = markdown.replace(/<br\s*\/?>/gi, '\n');
-  
+
   // Horizontal rules
   markdown = markdown.replace(/<hr\s*\/?>/gi, '\n---\n\n');
-  
+
   // Remove remaining HTML tags
   markdown = markdown.replace(/<[^>]+>/g, '');
-  
+
   // Clean up excessive newlines
   markdown = markdown.replace(/\n{3,}/g, '\n\n');
-  
+
   // Trim
   markdown = markdown.trim();
-  
+
   return markdown;
 }