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)/alertas/page.tsx

@@ -45,10 +45,7 @@ export default function AlertasPage() {
   };
 
   return (
-    <DashboardShell
-      title="Alertas"
-      description="Gestiona tus alertas y notificaciones"
-    >
+    <DashboardShell title="Alertas">
       <div className="space-y-4">
         {/* Stats */}
         <div className="grid gap-4 md:grid-cols-4">