Fix extension transfer system and browser phone compatibility

Major Fixes:
- Fixed extension transfers going directly to voicemail for available agents
- Resolved browser phone call disconnections during transfers
- Fixed voicemail transcription placeholder text issue
- Added Firefox compatibility with automatic media permissions

Extension Transfer Improvements:
- Changed from active client dialing to proper queue-based system
- Fixed client name generation consistency (user_login vs display_name)
- Added 2-minute timeout with automatic voicemail fallback
- Enhanced agent availability detection for browser phone users

Browser Phone Enhancements:
- Added automatic microphone/speaker permission requests
- Improved Firefox compatibility with explicit getUserMedia calls
- Fixed client naming consistency across capability tokens and call acceptance
- Added comprehensive error handling for permission denials

Database & System Updates:
- Added auto_busy_at column for automatic agent status reversion
- Implemented 1-minute auto-revert system for busy agents with cron job
- Updated database version to 1.6.2 for automatic migration
- Fixed voicemail user_id association for extension voicemails

Call Statistics & Logging:
- Fixed browser phone calls not appearing in agent statistics
- Enhanced call logging with proper agent_id association in JSON format
- Improved customer number detection for complex call topologies
- Added comprehensive debugging for call leg detection

Voicemail & Transcription:
- Replaced placeholder transcription with real Twilio API integration
- Added manual transcription request capability for existing voicemails
- Enhanced voicemail callback handling with user_id support
- Fixed transcription webhook processing for extension voicemails

Technical Improvements:
- Standardized client name generation across all components
- Added ElevenLabs TTS integration to agent connection messages
- Enhanced error handling and logging throughout transfer system
- Fixed TwiML generation syntax errors in dial() methods

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

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

includes/class-twp-activator.php

@@ -24,6 +24,11 @@ class TWP_Activator {
         
         // Create webhook endpoints
         flush_rewrite_rules();
+        
+        // Initialize user queues for existing users with phone numbers
+        if (class_exists('TWP_User_Queue_Manager')) {
+            TWP_User_Queue_Manager::initialize_all_user_queues();
+        }
     }
     
     /**
@@ -428,6 +433,14 @@ class TWP_Activator {
             }
         }
         
+        // Add user_id column to voicemails table for extension voicemails
+        $table_voicemails = $wpdb->prefix . 'twp_voicemails';
+        $voicemail_user_id_exists = $wpdb->get_results("SHOW COLUMNS FROM $table_voicemails LIKE 'user_id'");
+        if (empty($voicemail_user_id_exists)) {
+            $wpdb->query("ALTER TABLE $table_voicemails ADD COLUMN user_id int(11) DEFAULT NULL AFTER workflow_id");
+            $wpdb->query("ALTER TABLE $table_voicemails ADD INDEX user_id (user_id)");
+        }
+        
         // Add login tracking columns to agent_status table
         $table_agent_status = $wpdb->prefix . 'twp_agent_status';
         
@@ -441,6 +454,12 @@ class TWP_Activator {
             $wpdb->query("ALTER TABLE $table_agent_status ADD COLUMN logged_in_at datetime AFTER is_logged_in");
         }
         
+        // Add auto_busy_at column to track when agent was automatically set to busy
+        $auto_busy_at_exists = $wpdb->get_results("SHOW COLUMNS FROM $table_agent_status LIKE 'auto_busy_at'");
+        if (empty($auto_busy_at_exists)) {
+            $wpdb->query("ALTER TABLE $table_agent_status ADD COLUMN auto_busy_at datetime DEFAULT NULL AFTER logged_in_at");
+        }
+        
         $table_schedules = $wpdb->prefix . 'twp_phone_schedules';
         
         // Check if holiday_dates column exists