Fix admin refresh button layout and add status feedback

public/admin.html

@@ -37,8 +37,9 @@
     <label>
       Tenant ID:
       <input id="tenantId" value="default" />
-      <button id="refresh" style="margin-left: 0.5rem;">Actualizar módulos</button>
     </label>
+    <button id="refresh" style="margin-left: 0.5rem;">Actualizar módulos</button>
+    <span id="status" style="margin-left: 1rem; color: #555;"></span>
 
     <div id="modules"></div>
 
@@ -58,12 +59,17 @@
       }
 
       async function api(path, options = {}) {
+        const statusEl = document.getElementById('status');
+        statusEl.textContent = 'Consultando ' + path + '...';
         const res = await fetch(withTenant(`${apiRoot}${path}`), options);
         const data = await res.json().catch(() => null);
         if (!res.ok) {
           const err = data?.message ? data.message : res.statusText;
+          statusEl.textContent = `Error ${res.status}`;
           throw new Error(err || `HTTP ${res.status}`);
         }
+        statusEl.textContent = 'OK';
+        setTimeout(() => (statusEl.textContent = ''), 1500);
         return data;
       }