feat(#37): módulo de cartão de crédito com faturas mensais

- Migration 011: closing_day/due_day em accounts + tabela credit_bills
- CreditBillService: cria/atualiza fatura corrente on-demand no GET /accounts
- Widget FATURA ATUAL no dashboard com total e botão PAGAR
- AccountsView: campos closing_day/due_day para contas credit + painel fatura
- Dashboard: current_bills lista faturas não pagas de todos os cartões

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

apps/web/src/stores/dashboard.ts

@@ -1,6 +1,7 @@
 import { defineStore } from 'pinia'
 import { ref } from 'vue'
 import { api } from '@/services/api'
+import type { CreditBill } from './accounts'
 
 export interface CategoryTotal {
   category_id: number | null
@@ -44,6 +45,7 @@ export interface DashboardData {
   recent_transactions: RecentTransaction[]
   pending_recurring: number
   pending_income_recurrings: PendingIncome[]
+  current_bills: CreditBill[]
 }
 
 export const useDashboardStore = defineStore('dashboard', () => {