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/components/period-selector.tsx

@@ -0,0 +1,104 @@
+'use client';
+
+import { Button } from '@/components/ui/button';
+import { ChevronLeft, ChevronRight } from 'lucide-react';
+
+const meses = [
+  'Ene', 'Feb', 'Mar', 'Abr', 'May', 'Jun',
+  'Jul', 'Ago', 'Sep', 'Oct', 'Nov', 'Dic'
+];
+
+interface PeriodSelectorProps {
+  año: number;
+  mes?: number;
+  onAñoChange: (año: number) => void;
+  onMesChange?: (mes: number) => void;
+  showMonth?: boolean;
+  minYear?: number;
+  maxYear?: number;
+}
+
+export function PeriodSelector({
+  año,
+  mes,
+  onAñoChange,
+  onMesChange,
+  showMonth = true,
+  minYear = 2020,
+  maxYear = new Date().getFullYear(),
+}: PeriodSelectorProps) {
+
+  const handlePrev = () => {
+    if (showMonth && mes && onMesChange) {
+      if (mes === 1) {
+        if (año > minYear) {
+          onMesChange(12);
+          onAñoChange(año - 1);
+        }
+      } else {
+        onMesChange(mes - 1);
+      }
+    } else {
+      if (año > minYear) {
+        onAñoChange(año - 1);
+      }
+    }
+  };
+
+  const handleNext = () => {
+    if (showMonth && mes && onMesChange) {
+      if (mes === 12) {
+        if (año < maxYear) {
+          onMesChange(1);
+          onAñoChange(año + 1);
+        }
+      } else {
+        onMesChange(mes + 1);
+      }
+    } else {
+      if (año < maxYear) {
+        onAñoChange(año + 1);
+      }
+    }
+  };
+
+  const canGoPrev = showMonth && mes
+    ? !(año === minYear && mes === 1)
+    : año > minYear;
+
+  const canGoNext = showMonth && mes
+    ? !(año === maxYear && mes === 12)
+    : año < maxYear;
+
+  const displayText = showMonth && mes
+    ? `${meses[mes - 1]} ${año}`
+    : `${año}`;
+
+  return (
+    <div className="flex items-center gap-1">
+      <Button
+        variant="ghost"
+        size="icon"
+        className="h-8 w-8"
+        onClick={handlePrev}
+        disabled={!canGoPrev}
+      >
+        <ChevronLeft className="h-4 w-4" />
+      </Button>
+
+      <span className="min-w-[90px] text-center text-sm font-medium">
+        {displayText}
+      </span>
+
+      <Button
+        variant="ghost"
+        size="icon"
+        className="h-8 w-8"
+        onClick={handleNext}
+        disabled={!canGoNext}
+      >
+        <ChevronRight className="h-4 w-4" />
+      </Button>
+    </div>
+  );
+}