fix: salir button works, cap at 3 buttons, no AI error on unmatched input

- Add 'goodbye' function: resets context + sends farewell with menu hint
- Add safety slice to 3 buttons in buildMenuResponse (WhatsApp hard limit)
- In hybrid mode: when greeting_menu is configured for the user's category,
  use it as fallback instead of escalating to AI — prevents "Lo siento,
  tengo problemas..." from appearing when nothing matches
- Expose buildGreetingMenu() as public for BotRouter access
- DB: fixed submenu_informes and submenu_ciclos from 4→3 buttons,
  added salir flow (goodbye function) and salir/exit commands (company 2)

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

services/NormalBot.php

@@ -119,6 +119,10 @@ class NormalBot
                 ConversationContext::reset($ctxId);
                 return self::sendText('¿En qué más puedo ayudarte?', $context['from'], $company);
             })(),
+            'goodbye' => (function () use ($ctxId, $context, $company) {
+                ConversationContext::reset($ctxId);
+                return self::sendText("Hasta luego 👋\n\nEscribe *menu* cuando quieras volver.", $context['from'], $company);
+            })(),
             'forward_to_ai' => null,
             'api_report' => self::executeApiReport($params, $context, $company, $ctxId),
             default => null,
@@ -241,6 +245,11 @@ class NormalBot
         return self::sendText('✅ Reporte enviado.' . $nav, $context['from'], $company);
     }
 
+    public static function buildGreetingMenu(array $menu, string $to, array $company): ?array
+    {
+        return self::buildMenuResponse($menu, $to, $company);
+    }
+
     private static function buildMenuResponse(array $menu, string $to, array $company): ?array
     {
         $menuType = $menu['type'] ?? 'list';
@@ -284,7 +293,7 @@ class NormalBot
 
         if ($menuType === 'button') {
             $buttons = [];
-            foreach ($menu['buttons'] ?? [] as $btn) {
+            foreach (array_slice($menu['buttons'] ?? [], 0, 3) as $btn) {
                 $buttons[] = [
                     'type' => 'reply',
                     'reply' => [