feat: buscador de formularios en lab_formularios.php

- Input de búsqueda filtra tarjetas por nombre o tipo en tiempo real

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

lab_formularios.php

@@ -85,6 +85,13 @@ require_once __DIR__ . '/shared/components/sidebar.php';
 
     <!-- ── LISTA ──────────────────────────────────────────────── -->
     <div id="panel-lista">
+        <div class="mb-3">
+            <div class="input-group input-group-sm" style="max-width:320px">
+                <span class="input-group-text"><i class="fas fa-search"></i></span>
+                <input type="text" id="inp-buscar-form" class="form-control"
+                       placeholder="Buscar formulario…" oninput="filtrarFormularios(this.value)" autocomplete="off">
+            </div>
+        </div>
         <div class="row g-3" id="formularios-grid">
             <div class="col-12 text-center py-5 text-muted">
                 <div class="spinner-border spinner-border-sm"></div> Cargando…
@@ -393,6 +400,20 @@ async function cargarFormularios() {
     renderFormularios();
 }
 
+function filtrarFormularios(q) {
+    q = q.trim().toLowerCase();
+    const grid = $('formularios-grid');
+    if (!q) { renderFormularios(); return; }
+    const filtrados = _formularios.filter(f =>
+        (f.nombre || '').toLowerCase().includes(q) ||
+        (f.tipo   || '').toLowerCase().includes(q)
+    );
+    const orig = _formularios;
+    _formularios = filtrados;
+    renderFormularios();
+    _formularios = orig;
+}
+
 function renderFormularios() {
     const grid = $('formularios-grid');
     if (!_formularios.length) {