Fix queue loading, null-safe models, autofill, and add outbound dialer

- Fix queue queries in mobile API and SSE to use twp_group_members
  (matching browser phone) instead of twp_queue_assignments
- Auto-create personal queues if user has no extension
- Make all model JSON parsing null-safe (handle null, string ints, bools)
- Add AutofillGroup and autofill hints to login form
- Add outbound calling with dialpad bottom sheet on dashboard

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

includes/class-twp-mobile-sse.php

@@ -142,38 +142,40 @@ class TWP_Mobile_SSE {
         global $wpdb;
         $queues_table = $wpdb->prefix . 'twp_call_queues';
         $calls_table = $wpdb->prefix . 'twp_queued_calls';
-        $assignments_table = $wpdb->prefix . 'twp_queue_assignments';
+        $groups_table = $wpdb->prefix . 'twp_group_members';
 
-        // Get queue IDs
-        $queue_ids = $wpdb->get_col($wpdb->prepare(
-            "SELECT queue_id FROM $assignments_table WHERE user_id = %d",
+        // Auto-create personal queues if they don't exist
+        $extensions_table = $wpdb->prefix . 'twp_user_extensions';
+        $existing_extension = $wpdb->get_row($wpdb->prepare(
+            "SELECT extension FROM $extensions_table WHERE user_id = %d",
             $user_id
         ));
 
-        $personal_queue_ids = $wpdb->get_col($wpdb->prepare(
-            "SELECT id FROM $queues_table WHERE user_id = %d",
-            $user_id
-        ));
-
-        $all_queue_ids = array_unique(array_merge($queue_ids, $personal_queue_ids));
-
-        if (empty($all_queue_ids)) {
-            return array();
+        if (!$existing_extension) {
+            TWP_User_Queue_Manager::create_user_queues($user_id);
         }
 
-        $queue_ids_str = implode(',', array_map('intval', $all_queue_ids));
-
-        $queues = $wpdb->get_results("
-            SELECT
+        // Get queues where user is a member of the assigned agent group OR personal/hold queues
+        $queues = $wpdb->get_results($wpdb->prepare("
+            SELECT DISTINCT
                 q.id,
                 q.queue_name,
                 COUNT(c.id) as waiting_count,
                 MIN(c.enqueued_at) as oldest_call_time
             FROM $queues_table q
+            LEFT JOIN $groups_table gm ON gm.group_id = q.agent_group_id
             LEFT JOIN $calls_table c ON q.id = c.queue_id AND c.status = 'waiting'
-            WHERE q.id IN ($queue_ids_str)
+            WHERE (gm.user_id = %d AND gm.is_active = 1)
+               OR (q.user_id = %d AND q.queue_type IN ('personal', 'hold'))
             GROUP BY q.id
-        ");
+            ORDER BY
+                CASE
+                    WHEN q.queue_type = 'personal' THEN 1
+                    WHEN q.queue_type = 'hold' THEN 2
+                    ELSE 3
+                END,
+                q.queue_name ASC
+        ", $user_id, $user_id));
 
         $result = array();
         foreach ($queues as $queue) {