fix: improve markdown conversion and advanced fields visibility

- Enhanced markdown to HTML conversion with proper list handling
- Added support for H4, H5, H6 headers in TinyMCE editor configuration
- Improved bullet list processing with proper <ul> wrapping
- Fixed advanced fields visibility by adding CSS display:none default
- Timezone selector and advanced options (capacity, cost) now properly hidden

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

assets/css/hvac-searchable-selectors.css

@@ -356,6 +356,7 @@
     background: #f8f9fa;
     border-radius: 0 4px 4px 0;
     position: relative;
+    display: none; /* Hidden by default */
 }
 
 .advanced-field::before {

assets/js/hvac-ai-assist.js

@@ -716,7 +716,8 @@ jQuery(document).ready(function($) {
         markdownToHtml: function(markdown) {
             let html = markdown;
 
-            // Convert headers (## -> h2, ### -> h3, etc.)
+            // Convert headers (#### -> h4, ### -> h3, ## -> h2, # -> h1)
+            html = html.replace(/^#### (.+)$/gm, '<h4>$1</h4>');
             html = html.replace(/^### (.+)$/gm, '<h3>$1</h3>');
             html = html.replace(/^## (.+)$/gm, '<h2>$1</h2>');
             html = html.replace(/^# (.+)$/gm, '<h1>$1</h1>');
@@ -727,25 +728,56 @@ jQuery(document).ready(function($) {
             // Convert italic text (*text* -> <em>text</em>)
             html = html.replace(/\*([^*]+)\*/g, '<em>$1</em>');
 
-            // Convert bullet lists (* item -> <ul><li>item</li></ul>)
+            // Process lines for better list handling
-            html = html.replace(/^\* (.+)$/gm, '<li>$1</li>');
-
-            // Wrap consecutive <li> items in <ul> tags
-            html = html.replace(/(<li>.*<\/li>)/gs, function(match) {
-                if (!match.includes('<ul>')) {
-                    return '<ul>' + match + '</ul>';
-                }
-                return match;
-            });
-
-            // Convert line breaks to <p> tags for paragraphs
             const lines = html.split('\n');
+            const processedLines = [];
+            let inList = false;
+
+            for (let i = 0; i < lines.length; i++) {
+                let line = lines[i].trim();
+
+                // Handle bullet list items
+                if (line.match(/^\* (.+)$/)) {
+                    const listItemContent = line.replace(/^\* (.+)$/, '$1');
+
+                    if (!inList) {
+                        processedLines.push('<ul>');
+                        inList = true;
+                    }
+                    processedLines.push(`<li>${listItemContent}</li>`);
+
+                    // Check if next line is also a list item or if this is the last line
+                    const nextLine = i + 1 < lines.length ? lines[i + 1].trim() : '';
+                    if (!nextLine.match(/^\* (.+)$/)) {
+                        processedLines.push('</ul>');
+                        inList = false;
+                    }
+                } else {
+                    // Close list if we were in one
+                    if (inList) {
+                        processedLines.push('</ul>');
+                        inList = false;
+                    }
+
+                    // Add regular line
+                    if (line !== '') {
+                        processedLines.push(line);
+                    } else {
+                        processedLines.push(''); // Preserve empty lines for paragraph breaks
+                    }
+                }
+            }
+
+            // Close any remaining open list
+            if (inList) {
+                processedLines.push('</ul>');
+            }
+
+            // Convert to paragraphs
             const paragraphs = [];
             let currentParagraph = '';
 
-            for (let line of lines) {
+            for (let line of processedLines) {
-                line = line.trim();
-
                 // Skip empty lines
                 if (line === '') {
                     if (currentParagraph) {
@@ -756,7 +788,7 @@ jQuery(document).ready(function($) {
                 }
 
                 // If line is already wrapped in HTML tags, add it as is
-                if (line.match(/^<(h[1-6]|ul|li|strong|em)/)) {
+                if (line.match(/^<(h[1-6]|ul|\/ul|li|strong|em)/)) {
                     if (currentParagraph) {
                         paragraphs.push(currentParagraph);
                         currentParagraph = '';
@@ -779,7 +811,7 @@ jQuery(document).ready(function($) {
 
             // Wrap non-HTML paragraphs in <p> tags
             const formattedParagraphs = paragraphs.map(p => {
-                if (p.match(/^<(h[1-6]|ul|li)/)) {
+                if (p.match(/^<(h[1-6]|ul|\/ul|li)/)) {
                     return p;
                 } else {
                     return '<p>' + p + '</p>';

includes/class-hvac-event-form-builder.php

@@ -1652,7 +1652,7 @@ HTML;
                 'tinymce' => [
                     'toolbar1' => 'formatselect,bold,italic,underline,strikethrough,|,bullist,numlist,|,link,unlink,|,blockquote,hr,|,alignleft,aligncenter,alignright,|,undo,redo',
                     'toolbar2' => '',
-                    'block_formats' => 'Paragraph=p;Heading 2=h2;Heading 3=h3;Heading 4=h4;Preformatted=pre',
+                    'block_formats' => 'Paragraph=p;Heading 2=h2;Heading 3=h3;Heading 4=h4;Heading 5=h5;Heading 6=h6;Preformatted=pre',
                     'forced_root_block' => 'p',
                     'force_p_newlines' => true,
                     'remove_redundant_brs' => true,