feat: bulk XML upload, period selector, and session persistence

- Add bulk XML CFDI upload support (up to 300MB)
- Add period selector component for month/year navigation
- Fix session persistence on page refresh (Zustand hydration)
- Fix income/expense classification based on tenant RFC
- Fix IVA calculation from XML (correct Impuestos element)
- Add error handling to reportes page
- Support multiple CORS origins
- Update reportes service with proper Decimal/BigInt handling
- Add RFC to tenant view store for proper CFDI classification
- Update README with changelog and new features

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/app/(dashboard)/impuestos/page.tsx

@@ -5,20 +5,20 @@ import { Header } from '@/components/layouts/header';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { KpiCard } from '@/components/charts/kpi-card';
+import { PeriodSelector } from '@/components/period-selector';
 import { useIvaMensual, useResumenIva, useResumenIsr } from '@/lib/hooks/use-impuestos';
 import { Calculator, TrendingUp, TrendingDown, Receipt } from 'lucide-react';
 
 const meses = ['Ene', 'Feb', 'Mar', 'Abr', 'May', 'Jun', 'Jul', 'Ago', 'Sep', 'Oct', 'Nov', 'Dic'];
 
 export default function ImpuestosPage() {
-  const currentYear = new Date().getFullYear();
-  const currentMonth = new Date().getMonth() + 1;
-  const [año] = useState(currentYear);
+  const [año, setAño] = useState(new Date().getFullYear());
+  const [mes, setMes] = useState(new Date().getMonth() + 1);
   const [activeTab, setActiveTab] = useState<'iva' | 'isr'>('iva');
 
   const { data: ivaMensual, isLoading: ivaLoading } = useIvaMensual(año);
-  const { data: resumenIva } = useResumenIva(año, currentMonth);
-  const { data: resumenIsr } = useResumenIsr(año, currentMonth);
+  const { data: resumenIva } = useResumenIva(año, mes);
+  const { data: resumenIsr } = useResumenIsr(año, mes);
 
   const formatCurrency = (value: number) =>
     new Intl.NumberFormat('es-MX', {
@@ -29,7 +29,14 @@ export default function ImpuestosPage() {
 
   return (
     <>
-      <Header title="Control de Impuestos" />
+      <Header title="Control de Impuestos">
+        <PeriodSelector
+          año={año}
+          mes={mes}
+          onAñoChange={setAño}
+          onMesChange={setMes}
+        />
+      </Header>
       <main className="p-6 space-y-6">
         {/* Tabs */}
         <div className="flex gap-2">