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)/calendario/page.tsx

@@ -69,10 +69,7 @@ export default function CalendarioPage() {
   };
 
   return (
-    <DashboardShell
-      title="Calendario Fiscal"
-      description="Obligaciones fiscales y eventos importantes"
-    >
+    <DashboardShell title="Calendario Fiscal">
       <div className="grid gap-4 lg:grid-cols-3">
         {/* Calendar */}
         <Card className="lg:col-span-2">