fix: critical master dashboard rendering issues identified in zen code review

Address top 3 critical issues preventing dashboard content from rendering:

1. HTML Injection Fix (class-hvac-community-events.php:924-927):
   - Move error div from wp_head to wp_footer with proper styling
   - Prevent markup corruption that breaks content rendering
   - Add proper escaping with esc_html()

2. Remove Template Redundancy (class-hvac-community-events.php):
   - Remove force_master_dashboard_content() method and filter
   - Eliminate competing content injection mechanisms
   - Simplify to single template_include approach

3. Navigation System Integration (class-hvac-master-menu-system.php):
   - Align DOM IDs with existing JavaScript expectations
   - Change wrapper classes to match existing CSS hooks
   - Fix capability vs role filtering logic

4. Template Safety (page-master-dashboard.php):
   - Guard constant definition to prevent redefinition notices

These fixes resolve zen GPT-5 identified issues:
- [CRITICAL] HTML in wp_head breaking content display
- [HIGH] Redundant template mechanisms causing conflicts
- [HIGH] CSS/JS integration mismatches preventing navigation
- [MEDIUM] Capability filtering using role names incorrectly

Architecture improvements maintain security while fixing execution.

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

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

includes/class-hvac-community-events.php

@@ -151,8 +151,6 @@ class HVAC_Community_Events {
 		// Template loading for custom pages
 		add_filter('template_include', array($this, 'load_custom_templates'), 999);
 		
-		// Force correct content on master dashboard
-		add_filter('the_content', array($this, 'force_master_dashboard_content'), 1);
 		
 		// Force content on edit event page
 		add_filter('the_content', array($this, 'force_edit_event_content'), 1);
@@ -921,9 +919,9 @@ class HVAC_Community_Events {
 						HVAC_Logger::error("Template validation failed in load_custom_templates: {$validation}", 'Core');
 						
 						// Display error or fallback template
-						add_action('wp_head', function() use ($validation) {
+						add_action('wp_footer', function() use ($validation) {
-							echo '<div class="hvac-error">There was a problem loading this page. ' . 
+							echo '<div class="hvac-error" style="position:fixed;bottom:10px;left:10px;z-index:100000;background:#fff;padding:10px;border:1px solid #e0e0e0;">' . 
-								'The administrator has been notified. Please try again later.</div>';
+								esc_html('There was a problem loading this page. The administrator has been notified. Please try again later.') . '</div>';
 						});
 						
 						// Either fall back to the standard WP template or use a simple error template
@@ -939,18 +937,6 @@ class HVAC_Community_Events {
 		return $template;
 	} // End load_custom_templates
 	
-	/**
-	 * Force master dashboard content on master dashboard page
-	 */
-	public function force_master_dashboard_content($content) {
-		// Only on master dashboard page
-		if (is_page('master-trainer/master-dashboard') && in_the_loop() && is_main_query()) {
-			// Return the master dashboard content
-			return $this->render_master_dashboard();
-		}
-		
-		return $content;
-	}
 	
 	/**
 	 * Force edit event content on edit event page

includes/class-hvac-master-menu-system.php

@@ -82,17 +82,17 @@ class HVAC_Master_Menu_System {
         
         $menu_items = $this->get_master_menu_structure();
         
-        echo '<div class="hvac-master-menu-wrapper">';
+        echo '<div class="hvac-trainer-menu-wrapper">';
-        echo '<nav class="hvac-master-nav" role="navigation">';
+        echo '<nav class="hvac-trainer-nav" role="navigation">';
         
         // Add hamburger button for mobile
-        echo '<button class="hvac-hamburger-menu" id="hvac-master-hamburger-menu" aria-label="Toggle menu" aria-expanded="false">';
+        echo '<button class="hvac-hamburger-menu" id="hvac-hamburger-menu" aria-label="Toggle menu" aria-expanded="false">';
         echo '<span class="hvac-hamburger-line"></span>';
         echo '<span class="hvac-hamburger-line"></span>';
         echo '<span class="hvac-hamburger-line"></span>';
         echo '</button>';
         
-        echo '<ul class="hvac-master-menu" id="hvac-master-menu">';
+        echo '<ul class="hvac-trainer-menu" id="hvac-trainer-menu">';
         
         foreach ($menu_items as $item) {
             $this->render_menu_item($item);
@@ -209,7 +209,17 @@ class HVAC_Master_Menu_System {
             // Check if user has capability for this item
             $required_cap = isset($item['cap']) ? $item['cap'] : 'hvac_master_trainer';
             
-            if (!current_user_can($required_cap)) {
+            // Handle role names vs capabilities properly
+            $user = wp_get_current_user();
+            $has_access = false;
+            
+            if ($required_cap === 'hvac_master_trainer') {
+                $has_access = in_array('hvac_master_trainer', (array) $user->roles, true) || current_user_can('manage_options');
+            } else {
+                $has_access = current_user_can($required_cap);
+            }
+            
+            if (!$has_access) {
                 continue; // Skip this item
             }
             
@@ -220,7 +230,15 @@ class HVAC_Master_Menu_System {
                 foreach ($item['children'] as $child) {
                     $child_cap = isset($child['cap']) ? $child['cap'] : 'hvac_master_trainer';
                     
-                    if (current_user_can($child_cap)) {
+                    // Handle role names vs capabilities properly for children too
+                    $has_child_access = false;
+                    if ($child_cap === 'hvac_master_trainer') {
+                        $has_child_access = in_array('hvac_master_trainer', (array) $user->roles, true) || current_user_can('manage_options');
+                    } else {
+                        $has_child_access = current_user_can($child_cap);
+                    }
+                    
+                    if ($has_child_access) {
                         $filtered_children[] = $child;
                     }
                 }

templates/page-master-dashboard.php

@@ -5,7 +5,9 @@
  */
 
 // Define constant to indicate we are in a page template
-define('HVAC_IN_PAGE_TEMPLATE', true);
+if (!defined('HVAC_IN_PAGE_TEMPLATE')) {
+    define('HVAC_IN_PAGE_TEMPLATE', true);
+}
 
 get_header();