Add payment modal for reloading credits with simulated payment flow

Integrated a modal to handle credit reloading with a simulated payment process. Updated logic to manage payment amount, successful payment handling, and credit updates. Improved UI with validations and placeholders for future payment gateway integration.

src/App.js

@@ -41,17 +41,24 @@ function App() {
     setIsMobileMenuOpen(false);
   };
 
+  const [showPayment, setShowPayment] = useState(false);
+
   const handleReloadCredits = () => {
-    const input = window.prompt('¿Cuántos créditos desea recargar?');
-    if (input == null) return;
-    const add = parseInt(input, 10);
-    if (Number.isNaN(add) || add <= 0) {
-      alert('Ingrese un número válido mayor a 0.');
-      return;
+    // Abrir modal de pasarela de pago
+    setShowPayment(true);
+  };
+
+  const handlePaymentClose = () => setShowPayment(false);
+
+  const handlePaymentSuccess = (amount) => {
+    // Actualizar créditos después de un pago exitoso
+    const add = parseInt(amount, 10);
+    if (!Number.isNaN(add) && add > 0) {
+      const next = credits + add;
+      setCredits(next);
+      try { localStorage.setItem('credits', String(next)); } catch {}
     }
-    const next = credits + add;
-    setCredits(next);
-    try { localStorage.setItem('credits', String(next)); } catch {}
+    setShowPayment(false);
   };
 
   const headerTitle = activeView === 'scheduled'
@@ -68,6 +75,25 @@ function App() {
     ? 'Perfil'
     : 'Dashboard';
 
+  const [paymentAmount, setPaymentAmount] = useState('');
+  const [isPaying, setIsPaying] = useState(false);
+
+  const proceedPayment = async () => {
+    const val = parseInt(paymentAmount, 10);
+    if (Number.isNaN(val) || val <= 0) {
+      alert('Ingrese un monto válido mayor a 0.');
+      return;
+    }
+    // Simulación de pasarela de pago
+    try {
+      setIsPaying(true);
+      await new Promise((res) => setTimeout(res, 1200));
+      handlePaymentSuccess(val);
+    } finally {
+      setIsPaying(false);
+    }
+  };
+
   return (
     <div className="container">
       <Sidebar 
@@ -99,6 +125,70 @@ function App() {
             </div>
           </section>
         )}
+
+        {showPayment && (
+          <div className="modal-overlay" onClick={handlePaymentClose}>
+            <div className="modal" onClick={(e) => e.stopPropagation()}>
+              <div className="modal-header">
+                <h3>
+                  <i className="fas fa-credit-card"></i>
+                  Recargar créditos
+                </h3>
+                <button className="btn btn-outline btn-sm" onClick={handlePaymentClose} disabled={isPaying}>
+                  <i className="fas fa-times"></i> Cerrar
+                </button>
+              </div>
+              <div className="modal-body">
+                <div className="form-container">
+                  <div className="form-row">
+                    <div className="form-group" style={{ flex: 1 }}>
+                      <label>
+                        <i className="fas fa-coins" aria-hidden="true"></i> Monto a recargar (créditos)
+                      </label>
+                      <input
+                        className="input"
+                        type="number"
+                        min={1}
+                        step={1}
+                        value={paymentAmount}
+                        onChange={(e) => setPaymentAmount(e.target.value)}
+                        placeholder="Ej: 10"
+                        disabled={isPaying}
+                        autoFocus
+                      />
+                    </div>
+                  </div>
+
+                  {/* Placeholder de pasarela de pago: reemplace con su integración real (Mercado Pago, Stripe, etc.) */}
+                  <div className="card" style={{ marginTop: 12 }}>
+                    <div className="form-header">
+                      <h3>
+                        <i className="fas fa-shield-alt" style={{ marginRight: 8 }}></i>
+                        Pasarela de pago
+                      </h3>
+                    </div>
+                    <div style={{ padding: 12 }}>
+                      <p style={{ marginTop: 0, color: 'var(--gray)' }}>
+                        Esta es una simulación. Conecte aquí su pasarela (iframe, checkout, etc.).
+                      </p>
+                      <button className="btn btn-primary" onClick={proceedPayment} disabled={isPaying}>
+                        {isPaying ? (
+                          <>
+                            <i className="fas fa-spinner fa-spin"></i> Procesando...
+                          </>
+                        ) : (
+                          <>
+                            <i className="fas fa-lock"></i> Pagar y recargar
+                          </>
+                        )}
+                      </button>
+                    </div>
+                  </div>
+                </div>
+              </div>
+            </div>
+          </div>
+        )}
       </main>
     </div>
   );