refactor: technical debt cleanup for v2.1.6

- Fix version mismatch (2.0.0 → 2.1.5 in main plugin file)
- Fix modal FOUC (CSS defaults to display:none, JS adds .active class)
- Replace direct error_log() with HVAC_Logger for conditional debug logging
- All logging now respects WP_DEBUG flag for production cleanliness

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

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

assets/css/hvac-announcements-admin.css

@@ -172,11 +172,16 @@
     height: 100%;
     background: rgba(0, 0, 0, 0.5);
     z-index: 100000; /* Below WordPress media modal (160000) to allow media library to stack on top */
-    display: flex;
+    display: none; /* Hidden by default to prevent FOUC */
     justify-content: center;
     align-items: center;
 }
 
+/* Modal active state - shown by JavaScript */
+.hvac-modal.active {
+    display: flex;
+}
+
 .modal-content {
     background: white;
     width: 90%;

hvac-community-events.php

@@ -3,7 +3,7 @@
  * Plugin Name: HVAC Community Events
  * Plugin URI: https://upskillhvac.com
  * Description: Custom plugin for HVAC trainer event management system
- * Version: 2.0.0
+ * Version: 2.1.6
  * Author: Upskill HVAC
  * Author URI: https://upskillhvac.com
  * License: GPL-2.0+

includes/class-hvac-announcements-admin.php

@@ -40,54 +40,43 @@ class HVAC_Announcements_Admin {
      * Constructor
      */
     private function __construct() {
-        error_log('HVAC_Announcements_Admin: Constructor called - initializing hooks');
+        HVAC_Logger::log('Constructor called - initializing hooks', 'Announcements Admin');
         $this->init_hooks();
-        error_log('HVAC_Announcements_Admin: Hooks initialized successfully');
+        HVAC_Logger::log('Hooks initialized successfully', 'Announcements Admin');
     }
 
     /**
      * Initialize hooks
      */
     private function init_hooks() {
-        error_log('HVAC_Announcements_Admin: Registering wp_enqueue_scripts hook with priority 20');
+        HVAC_Logger::log('Registering wp_enqueue_scripts hook with priority 20', 'Announcements Admin');
         // Use priority 20 to ensure post object is available
         add_action('wp_enqueue_scripts', array($this, 'enqueue_admin_assets'), 20);
-        error_log('HVAC_Announcements_Admin: Hook registered successfully');
-
-        // Also try init hook to verify hooks are working at all
-        add_action('init', array($this, 'test_hook'));
-    }
-
-    /**
-     * Test hook to verify hooks are working
-     */
-    public function test_hook() {
-        error_log('HVAC_Announcements_Admin: TEST HOOK FIRED - hooks are working!');
+        HVAC_Logger::log('Hook registered successfully', 'Announcements Admin');
     }
     
     /**
      * Enqueue admin assets on master trainer pages
      */
     public function enqueue_admin_assets() {
-        // Debug logging
-        error_log('HVAC Announcements Admin: enqueue_admin_assets called');
-        error_log('HVAC Announcements Admin: is_master_trainer = ' . (HVAC_Announcements_Permissions::is_master_trainer() ? 'YES' : 'NO'));
-        error_log('HVAC Announcements Admin: is_page_template check = ' . (is_page_template('page-master-announcements.php') ? 'YES' : 'NO'));
+        HVAC_Logger::log('enqueue_admin_assets called', 'Announcements Admin');
+        HVAC_Logger::log('is_master_trainer = ' . (HVAC_Announcements_Permissions::is_master_trainer() ? 'YES' : 'NO'), 'Announcements Admin');
+        HVAC_Logger::log('is_page_template check = ' . (is_page_template('page-master-announcements.php') ? 'YES' : 'NO'), 'Announcements Admin');
 
         $queried = get_queried_object();
         if ($queried) {
-            error_log('HVAC Announcements Admin: queried_object type = ' . get_class($queried));
+            HVAC_Logger::log('queried_object type = ' . get_class($queried), 'Announcements Admin');
             if (is_a($queried, 'WP_Post')) {
-                error_log('HVAC Announcements Admin: post_name = ' . $queried->post_name);
-                error_log('HVAC Announcements Admin: post_type = ' . $queried->post_type);
+                HVAC_Logger::log('post_name = ' . $queried->post_name, 'Announcements Admin');
+                HVAC_Logger::log('post_type = ' . $queried->post_type, 'Announcements Admin');
                 $template = get_post_meta($queried->ID, '_wp_page_template', true);
-                error_log('HVAC Announcements Admin: page_template meta = ' . $template);
+                HVAC_Logger::log('page_template meta = ' . $template, 'Announcements Admin');
             }
         }
 
         // Only enqueue on master trainer announcement pages
         if ($this->is_master_trainer_announcement_page()) {
-            error_log('HVAC Announcements Admin: ENQUEUING SCRIPTS');
+            HVAC_Logger::log('ENQUEUING SCRIPTS', 'Announcements Admin');
 
             // Enqueue editor - dependencies handled automatically
             wp_enqueue_editor();

includes/class-hvac-plugin.php

@@ -115,7 +115,7 @@ final class HVAC_Plugin {
             define('HVAC_PLUGIN_VERSION', '2.0.0');
         }
         if (!defined('HVAC_VERSION')) {
-            define('HVAC_VERSION', '2.1.5');
+            define('HVAC_VERSION', '2.1.6');
         }
         if (!defined('HVAC_PLUGIN_FILE')) {
             define('HVAC_PLUGIN_FILE', dirname(__DIR__) . '/hvac-community-events.php');