fix: prevenir multiplos agendamentos travando botao durante a submissao

database/init.sql

@@ -14,6 +14,7 @@ CREATE TABLE IF NOT EXISTS plans (
   name VARCHAR(100) NOT NULL,
   slug VARCHAR(100) UNIQUE NOT NULL,
   description TEXT,
+  price NUMERIC(10,2) NOT NULL DEFAULT 0,
   price_monthly NUMERIC(10,2) NOT NULL DEFAULT 0,
   price_yearly NUMERIC(10,2) NOT NULL DEFAULT 0,
   max_professionals INT NOT NULL DEFAULT 1,
@@ -201,6 +202,7 @@ CREATE TABLE IF NOT EXISTS appointments (
   notes TEXT,
   client_name VARCHAR(200), -- for walk-ins
   client_phone VARCHAR(20),
+  client_email VARCHAR(200),
   source VARCHAR(20) DEFAULT 'manual', -- manual, online, whatsapp
   cancelled_at TIMESTAMPTZ,
   cancellation_reason TEXT,

src/components/Agenda.tsx

@@ -62,6 +62,7 @@ export default function Agenda() {
   const [newDate, setNewDate] = useState(today.toISOString().split('T')[0]);
   const [newTime, setNewTime] = useState('10:00');
   const [newNotes, setNewNotes] = useState('');
+  const [submitting, setSubmitting] = useState(false);
 
   useEffect(() => {
     if (professionals.length > 0 && !newProf) {
@@ -247,8 +248,8 @@ export default function Agenda() {
               </div>
             </div>
             <div className="modal-footer">
-              <button className="btn btn-secondary" onClick={() => setShowModal(false)}>Cancelar</button>
+              <button className="btn btn-secondary" disabled={submitting} onClick={() => setShowModal(false)}>Cancelar</button>
-              <button className="btn btn-primary" onClick={async () => {
+              <button className="btn btn-primary" disabled={submitting} onClick={async () => {
                 const [h, m] = newTime.split(':').map(Number);
                 const selectedSvc = services.find(s => s.id === newService);
                 
@@ -258,6 +259,7 @@ export default function Agenda() {
 
                 const slug = localStorage.getItem('agendapro_tenant_slug') || 'barbearia-premium';
 
+                setSubmitting(true);
                 try {
                   const res = await fetch('/api/tenant/agenda', {
                     method: 'POST',
@@ -288,8 +290,10 @@ export default function Agenda() {
                   }
                 } catch (e) {
                   console.error(e);
+                } finally {
+                  setSubmitting(false);
                 }
-              }}>Agendar</button>
+              }}>{submitting ? 'Agendando...' : 'Agendar'}</button>
             </div>
           </div>
         </div>