fix(admin): endpoint names in selects, per_type merge, category labels, cmd datalist

- Load name+direction in botConfig() endpoint query (was missing name column)
- Show friendly endpoint names in all flow select dropdowns (was showing raw key)
- Fix per_type save: merge with existing data instead of replacing (was wiping custom flows/commands per category)
- Fix category labels: Categoría 1 = Solo reporta, 2 = Solo recibe, 3 = Reporta y recibe
- Remove incorrect "menú debe ser de tipo botón" restriction text
- Add datalist to command action inputs so admin can pick from existing menu/flow IDs

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

public/index.php

@@ -477,20 +477,20 @@ $routes = [
         if ($aiProvider !== '') $config['ai_provider'] = $aiProvider;
         $config['ai_for_media'] = isset($_POST['ai_for_media']);
 
-        // Per-category menus
+        // Per-category menus — merge sobre la config existente para no perder flows/commands por categoría
         $perTypeMenus = $_POST['per_type_menu'] ?? [];
-        $perType = [];
+        $perType = $config['per_type'] ?? [];
         foreach ([1, 2, 3] as $cat) {
             $mk = trim($perTypeMenus[$cat] ?? '');
+            $key = (string)$cat;
             if ($mk !== '') {
-                $perType[(string)$cat] = [
-                    'greeting_menu' => $mk,
-                    'greeting'      => '',
-                    'fallback'      => '',
-                ];
+                $perType[$key] = array_merge($perType[$key] ?? [], ['greeting_menu' => $mk]);
+            } elseif (isset($perType[$key]['greeting_menu'])) {
+                unset($perType[$key]['greeting_menu']);
+                if (empty($perType[$key])) unset($perType[$key]);
             }
         }
-        if (!empty($perType)) $config['per_type'] = $perType;
+        $config['per_type'] = $perType;
 
         // General
         $greeting = trim($_POST['greeting'] ?? '');