feat: welcome message, fix per_type save, add missing ciclos flows

- Show welcome_msg (button with "Ver menú") for all new sessions before category menu
- Fix saveConfig() AJAX to include per_type_menu DOM values so they survive individual saves
- Add welcome_menu field to General tab in admin (render + save)
- Add 'atras' command alias (→ show_main_menu)
- Add ciclos_plagas, ciclos_palm, ciclos_tratamientos flows to DB config
- Fix per_type in DB from [] to {} (proper JSON object)

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

admin/DashboardController.php

@@ -2874,6 +2874,12 @@ HTML;
         $aiProviderVal = self::h($config['ai_provider'] ?? '');
         $approvalWebhookVal = self::h($config['approval_webhook'] ?? '');
         $ignoreVal = self::h(implode("\n", $config['ignore_prefixes'] ?? []));
+        $welcomeMenuVal = self::h($config['welcome_menu'] ?? '');
+        $welcomeMenuOpts = '';
+        foreach (array_keys($menus) as $mk) {
+            $s = ($config['welcome_menu'] ?? '') === $mk ? ' selected' : '';
+            $welcomeMenuOpts .= '<option value="' . self::h($mk) . '"' . $s . '>' . self::h($mk) . '</option>';
+        }
         $commands = $config['commands'] ?? [];
         $menus = $config['menus'] ?? [];
         $flows = $config['flows'] ?? [];
@@ -3421,10 +3427,18 @@ HTML;
       <div class="card-h">⚙️ General</div>
       <div style="display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start">
         <div>
+          <div class="form-group">
+            <label>Menú de bienvenida (welcome_menu)</label>
+            <select name="welcome_menu" style="width:100%;padding:9px 12px;border:1px solid #e2e5ea;border-radius:8px;font-size:13px">
+              <option value="">— Ninguno —</option>
+              {$welcomeMenuOpts}
+            </select>
+            <div style="font-size:11px;color:#7a8291;margin-top:3px">Menú que se muestra a TODOS los usuarios nuevos antes del menú principal</div>
+          </div>
           <div class="form-group">
             <label>Mensaje de bienvenida (greeting)</label>
             <textarea name="greeting" id="prevGreeting" rows="2" placeholder="¡Bienvenido! Escribe 'menu' para ver opciones..." oninput="updatePreview()" style="width:100%;padding:10px 14px;border:1px solid #e2e5ea;border-radius:8px;font-size:13px;outline:none;font-family:inherit;background:#fafbfc;resize:none">{$greetingVal}</textarea>
-            <div style="font-size:11px;color:#7a8291;margin-top:3px">Primer mensaje que recibe un usuario nuevo</div>
+            <div style="font-size:11px;color:#7a8291;margin-top:3px">Primer mensaje de texto que recibe un usuario nuevo (alternativo al welcome_menu)</div>
           </div>
           <div class="form-group">
             <label>Mensaje por defecto (fallback)</label>
@@ -4781,6 +4795,12 @@ function saveConfig() {
   fd.append('approval_webhook', fullConfig.approval_webhook || '');
   fd.append('ignore_prefixes', (fullConfig.ignore_prefixes || []).join('\\n'));
 
+  // Per-category menus — read from DOM so they're preserved on every AJAX save
+  [1, 2, 3].forEach(cat => {
+    const sel = document.querySelector('select[name="per_type_menu[' + cat + ']"]');
+    if (sel) fd.append('per_type_menu[' + cat + ']', sel.value);
+  });
+
   fetch('/admin/bot-config/save', {
     method: 'POST',
     body: fd

public/index.php

@@ -562,6 +562,8 @@ $routes = [
         }
         $approvalWebhook = trim($_POST['approval_webhook'] ?? '');
         if ($approvalWebhook !== '') $config['approval_webhook'] = $approvalWebhook;
+        $welcomeMenu = trim($_POST['welcome_menu'] ?? '');
+        if ($welcomeMenu !== '') $config['welcome_menu'] = $welcomeMenu;
 
         CompanyRepository::save(['id' => $companyId, 'config_json' => json_encode($config, JSON_UNESCAPED_UNICODE)]);
         header('Location: /admin/bot-config?id=' . $companyId . '&msg=saved');

services/NormalBot.php

@@ -76,7 +76,14 @@ class NormalBot
             return self::handleFlow($flows[$currentNode], $context, $company, $ctxId, $menus);
         }
 
-        // 4. Per-type greeting menu — only for brand-new sessions (currentNode === null)
+        // 4. Welcome message — shown once for brand-new sessions before the category menu
+        $welcomeMenuKey = $config['welcome_menu'] ?? null;
+        if ($welcomeMenuKey && $currentNode === null && isset($menus[$welcomeMenuKey])) {
+            ConversationContext::updateNode($ctxId, '__greeted');
+            return self::buildMenuResponse($menus[$welcomeMenuKey], $context['from'], $company);
+        }
+
+        // 4b. Per-type greeting menu — only for brand-new sessions (currentNode === null)
         $greetingMenuKey = $perType['greeting_menu'] ?? null;
         if ($greetingMenuKey !== null && $currentNode === null && isset($menus[$greetingMenuKey])) {
             ConversationContext::updateNode($ctxId, '__greeted'); // sentinel: evita re-envío del menú