diff --git a/admin/DashboardController.php b/admin/DashboardController.php
index efdf6b3..8a60c5a 100644
--- a/admin/DashboardController.php
+++ b/admin/DashboardController.php
@@ -2917,7 +2917,7 @@ HTML;
         <div style="font-weight:700;font-size:13px;color:#0b3d91;margin-bottom:12px">{$label}</div>
         <div class="form-group" style="margin-bottom:0">
           <label>Menú de bienvenida (greeting menu)</label>
-          <select name="per_type_menu[{$cat}]" onchange="savePerType()" style="width:100%;padding:9px 12px;border:1px solid #e2e5ea;border-radius:8px;font-size:13px">
+          <select name="per_type_menu[{$cat}]" style="width:100%;padding:9px 12px;border:1px solid #e2e5ea;border-radius:8px;font-size:13px">
             {$opts}
           </select>
           <div style="font-size:11px;color:#7a8291;margin-top:4px">Menú que se muestra cuando el usuario escribe por primera vez o sin contexto activo</div>
@@ -3347,6 +3347,7 @@ HTML;
       <div class="card-h">👥 Configuración por Categoría</div>
       <p style="font-size:12px;color:#7a8291;margin-bottom:16px">Define qué menú de bienvenida ve cada categoría de usuario cuando escribe por primera vez o sin contexto activo.</p>
       {$categoryTabHtml}
+      <button type="button" id="savePerTypeBtn" onclick="savePerType()" class="btn-primary" style="margin-top:8px">💾 Guardar categorías</button>
     </div>
 
     <!-- ─── AI ───────────────────────────────────────────────────────────── -->
@@ -3492,23 +3493,24 @@ const CONFIG    = {$botConfigJson};
 const ENDPOINTS = {$botEndpointsJson};
 
 function savePerType() {
-  const fd = new FormData();
-  fd.set('company_id', COMPANY_ID);
-  [1, 2, 3].forEach(cat => {
-    const sel = document.querySelector('select[name="per_type_menu[' + cat + ']"]');
+  const cid = document.querySelector('input[name="company_id"]').value;
+  const fd  = new FormData();
+  fd.set('company_id', cid);
+  [1, 2, 3].forEach(function(cat) {
+    var sel = document.querySelector('[name="per_type_menu[' + cat + ']"]');
     if (sel) fd.append('per_type_menu[' + cat + ']', sel.value);
   });
+  var btn = document.getElementById('savePerTypeBtn');
+  if (btn) { btn.textContent = 'Guardando...'; btn.disabled = true; }
   fetch('/admin/bot-config/save-per-type', { method: 'POST', body: fd })
-    .then(r => r.json())
-    .then(d => {
-      if (d.ok) {
-        const t = document.createElement('div');
-        t.className = 'toast toast-success';
-        t.textContent = '✅ Categorías guardadas';
-        t.style.cssText = 'position:fixed;bottom:24px;right:24px;z-index:9999;padding:10px 18px;border-radius:8px;background:#166534;color:#fff;font-size:13px;font-weight:600';
-        document.body.appendChild(t);
-        setTimeout(() => t.remove(), 2500);
-      }
+    .then(function(r) { return r.json(); })
+    .then(function(d) {
+      if (btn) { btn.textContent = '💾 Guardar categorías'; btn.disabled = false; }
+      alert(d.ok ? '✅ Categorías guardadas correctamente.' : '❌ Error al guardar: ' + JSON.stringify(d));
+    })
+    .catch(function(e) {
+      if (btn) { btn.textContent = '💾 Guardar categorías'; btn.disabled = false; }
+      alert('❌ Error de red: ' + e.message);
     });
 }
 
diff --git a/public/index.php b/public/index.php
index 907f682..c747627 100644
--- a/public/index.php
+++ b/public/index.php
@@ -557,10 +557,21 @@ $routes = [
         $approvalWebhook = trim($_POST['approval_webhook'] ?? '');
         if ($approvalWebhook !== '') $config['approval_webhook'] = $approvalWebhook;
         $welcomeMenu = trim($_POST['welcome_menu'] ?? '');
-        if ($welcomeMenu !== '') {
-            $config['welcome_menu'] = $welcomeMenu;
-        } elseif (!empty($existingConfig['welcome_menu'])) {
-            $config['welcome_menu'] = $existingConfig['welcome_menu'];
+        if ($welcomeMenu !== '') $config['welcome_menu'] = $welcomeMenu;
+
+        // Preserve any DB keys the form doesn't explicitly manage (welcome_menu, per_type, etc.)
+        $formManagedKeys = ['commands', 'menus', 'flows', 'ai_prompt', 'ai_model', 'ai_temperature',
+                            'ai_provider', 'openai_api_key', 'gemini_api_key', 'gemini_model',
+                            'ai_for_media', 'greeting', 'fallback', 'approval_webhook',
+                            'ignore_prefixes', 'welcome_menu', 'per_type'];
+        foreach ($existingConfig as $k => $v) {
+            if (!in_array($k, $formManagedKeys, true) && !isset($config[$k])) {
+                $config[$k] = $v;
+            }
+            // Also preserve managed keys that POST didn't provide (e.g. truncated by max_input_vars)
+            if (in_array($k, ['welcome_menu', 'per_type'], true) && !isset($config[$k])) {
+                $config[$k] = $v;
+            }
         }
 
         CompanyRepository::save(['id' => $companyId, 'config_json' => json_encode($config, JSON_UNESCAPED_UNICODE)]);