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/sidebar/nav-link.tsx

@@ -8,6 +8,7 @@ import {
   RiFileChartLine,
   RiFundsLine,
   RiGroupLine,
+  RiInboxLine,
   RiNoCreditCardLine,
   RiPriceTag3Line,
   RiSettingsLine,
@@ -87,6 +88,11 @@ export function createSidebarNavData(pagadores: PagadorLike[]): SidebarNavData {
       {
         title: "Gestão Financeira",
         items: [
+          {
+            title: "Caixa de Entrada",
+            url: "/caixa-de-entrada",
+            icon: RiInboxLine,
+          },
           {
             title: "Lançamentos",
             url: "/lancamentos",