feat(inbox): add Caixa de Entrada page for managing companion notifications

- Create inbox page with pending items management:
  - InboxCard: displays notification summary with parsed data
  - InboxDetailsDialog: view full notification details
  - ProcessDialog: convert notification to transaction (lancamento)

- Add server actions for inbox operations:
  - getInboxItems: fetch pending inbox items
  - processInboxItem: create lancamento from inbox item
  - discardInboxItem: discard unwanted notifications

- Add navigation link to sidebar under 'Gestão Financeira'
- Add revalidation config for inbox-related paths

components/caixa-de-entrada/inbox-page.tsx

@@ -0,0 +1,163 @@
+"use client";
+
+import { discardInboxItemAction } from "@/app/(dashboard)/caixa-de-entrada/actions";
+import { ConfirmActionDialog } from "@/components/confirm-action-dialog";
+import { EmptyState } from "@/components/empty-state";
+import { Card } from "@/components/ui/card";
+import { RiInboxLine } from "@remixicon/react";
+import { useCallback, useMemo, useState } from "react";
+import { toast } from "sonner";
+import { InboxCard } from "./inbox-card";
+import { InboxDetailsDialog } from "./inbox-details-dialog";
+import { ProcessDialog } from "./process-dialog";
+import type { InboxItem, SelectOption } from "./types";
+
+interface InboxPageProps {
+  items: InboxItem[];
+  categorias: SelectOption[];
+  contas: SelectOption[];
+  cartoes: SelectOption[];
+}
+
+export function InboxPage({
+  items,
+  categorias,
+  contas,
+  cartoes,
+}: InboxPageProps) {
+  const [processOpen, setProcessOpen] = useState(false);
+  const [itemToProcess, setItemToProcess] = useState<InboxItem | null>(null);
+
+  const [detailsOpen, setDetailsOpen] = useState(false);
+  const [itemDetails, setItemDetails] = useState<InboxItem | null>(null);
+
+  const [discardOpen, setDiscardOpen] = useState(false);
+  const [itemToDiscard, setItemToDiscard] = useState<InboxItem | null>(null);
+
+  const sortedItems = useMemo(
+    () =>
+      [...items].sort(
+        (a, b) =>
+          new Date(b.notificationTimestamp).getTime() -
+          new Date(a.notificationTimestamp).getTime()
+      ),
+    [items]
+  );
+
+  const handleProcessOpenChange = useCallback((open: boolean) => {
+    setProcessOpen(open);
+    if (!open) {
+      setItemToProcess(null);
+    }
+  }, []);
+
+  const handleDetailsOpenChange = useCallback((open: boolean) => {
+    setDetailsOpen(open);
+    if (!open) {
+      setItemDetails(null);
+    }
+  }, []);
+
+  const handleDiscardOpenChange = useCallback((open: boolean) => {
+    setDiscardOpen(open);
+    if (!open) {
+      setItemToDiscard(null);
+    }
+  }, []);
+
+  const handleProcessRequest = useCallback((item: InboxItem) => {
+    setItemToProcess(item);
+    setProcessOpen(true);
+  }, []);
+
+  const handleDetailsRequest = useCallback((item: InboxItem) => {
+    setItemDetails(item);
+    setDetailsOpen(true);
+  }, []);
+
+  const handleDiscardRequest = useCallback((item: InboxItem) => {
+    setItemToDiscard(item);
+    setDiscardOpen(true);
+  }, []);
+
+  const handleDiscardConfirm = useCallback(async () => {
+    if (!itemToDiscard) return;
+
+    const result = await discardInboxItemAction({
+      inboxItemId: itemToDiscard.id,
+    });
+
+    if (result.success) {
+      toast.success(result.message);
+      return;
+    }
+
+    toast.error(result.error);
+    throw new Error(result.error);
+  }, [itemToDiscard]);
+
+  return (
+    <>
+      <div className="flex w-full flex-col gap-6">
+        <div className="flex items-center justify-between">
+          <div>
+            <h1 className="text-2xl font-semibold">Caixa de Entrada</h1>
+            <p className="text-sm text-muted-foreground">
+              {items.length === 0
+                ? "Nenhuma notificação pendente"
+                : `${items.length} notificação${items.length > 1 ? "ões" : ""} pendente${items.length > 1 ? "s" : ""}`}
+            </p>
+          </div>
+        </div>
+
+        {sortedItems.length === 0 ? (
+          <Card className="flex min-h-[50vh] w-full items-center justify-center py-12">
+            <EmptyState
+              media={<RiInboxLine className="size-6 text-primary" />}
+              title="Caixa de entrada vazia"
+              description="As notificações capturadas pelo app OpenSheets Companion aparecerão aqui para você processar."
+            />
+          </Card>
+        ) : (
+          <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
+            {sortedItems.map((item) => (
+              <InboxCard
+                key={item.id}
+                item={item}
+                onProcess={handleProcessRequest}
+                onDiscard={handleDiscardRequest}
+                onViewDetails={handleDetailsRequest}
+              />
+            ))}
+          </div>
+        )}
+      </div>
+
+      <ProcessDialog
+        open={processOpen}
+        onOpenChange={handleProcessOpenChange}
+        item={itemToProcess}
+        categorias={categorias}
+        contas={contas}
+        cartoes={cartoes}
+      />
+
+      <InboxDetailsDialog
+        open={detailsOpen}
+        onOpenChange={handleDetailsOpenChange}
+        item={itemDetails}
+      />
+
+      <ConfirmActionDialog
+        open={discardOpen}
+        onOpenChange={handleDiscardOpenChange}
+        title="Descartar notificação?"
+        description="A notificação será marcada como descartada e não aparecerá mais na lista de pendentes."
+        confirmLabel="Descartar"
+        confirmVariant="destructive"
+        pendingLabel="Descartando..."
+        onConfirm={handleDiscardConfirm}
+      />
+    </>
+  );
+}