feat: add "Hoje" preset to corporate dashboard

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

src/admin-dashboard.js

@@ -488,6 +488,7 @@ ${buildHeader({ role: role, userName: user.nome, activePage: 'dashboard' })}
   <div class="filter-bar">
     <span class="filter-bar-label">Periodo:</span>
     <div class="filter-presets">
+      <button class="preset-btn" data-preset="hoje">Hoje</button>
       <button class="preset-btn active" data-preset="thisMonth">Este Mes</button>
       <button class="preset-btn" data-preset="lastMonth">Mes Anterior</button>
       <button class="preset-btn" data-preset="last2Months">Ultimos 2 Meses</button>
@@ -555,7 +556,10 @@ let charts = {};
 function getPresetDates(preset) {
   const now = new Date();
   let inicio, fim;
-  if (preset === 'thisMonth') {
+  if (preset === 'hoje') {
+    inicio = now;
+    fim = now;
+  } else if (preset === 'thisMonth') {
     inicio = new Date(now.getFullYear(), now.getMonth(), 1);
     fim = now;
   } else if (preset === 'lastMonth') {