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

lib/actions/helpers.ts

@@ -32,6 +32,7 @@ export const revalidateConfig = {
   pagadores: ["/pagadores"],
   anotacoes: ["/anotacoes", "/anotacoes/arquivadas"],
   lancamentos: ["/lancamentos", "/contas"],
+  inbox: ["/caixa-de-entrada", "/lancamentos", "/dashboard"],
 } as const;
 
 /**