Add comprehensive voicemail integration to browser phone

- Add AJAX endpoint for fetching user voicemails with stats and recent list
- Create voicemail display section with counts, transcriptions, and playback
- Implement click-to-play functionality for voicemail audio
- Add refresh and view-all buttons with admin page integration
- Style voicemail section with consistent design and dark mode support
- Include visual indicators for recordings and formatted durations
- Add mobile responsive design and hover effects

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

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

admin/class-twp-admin.php

@@ -3770,6 +3770,56 @@ class TWP_Admin {
         }
     }
     
+    /**
+     * AJAX handler for getting user's recent voicemails
+     */
+    public function ajax_get_user_voicemails() {
+        check_ajax_referer('twp_ajax_nonce', 'nonce');
+        
+        if (!current_user_can('manage_options') && !current_user_can('twp_access_voicemails')) {
+            wp_send_json_error('Unauthorized');
+            return;
+        }
+        
+        global $wpdb;
+        $table_name = $wpdb->prefix . 'twp_voicemails';
+        
+        // Get recent voicemails (last 10)
+        $voicemails = $wpdb->get_results($wpdb->prepare("
+            SELECT id, from_number, duration, transcription, created_at, recording_url
+            FROM $table_name 
+            ORDER BY created_at DESC 
+            LIMIT %d
+        ", 10));
+        
+        // Format data for frontend
+        $formatted_voicemails = array();
+        foreach ($voicemails as $vm) {
+            $formatted_voicemails[] = array(
+                'id' => $vm->id,
+                'from_number' => $vm->from_number,
+                'duration' => $vm->duration,
+                'transcription' => $vm->transcription ? substr($vm->transcription, 0, 100) . '...' : 'No transcription',
+                'created_at' => $vm->created_at,
+                'time_ago' => human_time_diff(strtotime($vm->created_at), current_time('timestamp')) . ' ago',
+                'has_recording' => !empty($vm->recording_url)
+            );
+        }
+        
+        // Get voicemail counts
+        $total_count = $wpdb->get_var("SELECT COUNT(*) FROM $table_name");
+        $today_count = $wpdb->get_var($wpdb->prepare("
+            SELECT COUNT(*) FROM $table_name 
+            WHERE DATE(created_at) = %s
+        ", current_time('Y-m-d')));
+        
+        wp_send_json_success(array(
+            'voicemails' => $formatted_voicemails,
+            'total_count' => $total_count,
+            'today_count' => $today_count
+        ));
+    }
+    
     /**
      * AJAX handler for getting all groups
      */