feat(dashboard): add pending/upcoming expenses table

- Backend: GET /expenses/pending-upcoming returns PENDING expenses with dueDate <= today+5 days, classified as overdue/upcoming
- DashboardExpensesTable: groups by periodicExpenseId, shows summed totals with status badges, links to /expenses?periodicExpenseId=X
- Expenses route accepts ?periodicExpenseId search param and pre-selects it in the filter
- fix: BeloAnalysisPage DatePicker type mismatch

apps/frontend/src/lib/queries.ts

@@ -12,6 +12,7 @@ import {
   getTotalPending,
   importPeriodicExpenses,
   importExpenses,
+  getPendingUpcomingExpenses,
   type CreatePeriodicExpenseInput, type CreateNonPeriodicExpenseInput, type PayExpenseInput,
 } from "./api";
 
@@ -92,6 +93,7 @@ export const expenseKeys = {
   monthlyTotal: (year: number, month: number) => ["expenses", "monthly-total", year, month] as const,
   monthlyTotals: (year: number, month: number) => ["expenses", "totals", year, month] as const,
   totalPending: ["expenses", "pending-total"] as const,
+  pendingUpcoming: ["expenses", "pending-upcoming"] as const,
 };
 
 export function usePeriodicExpenses() {
@@ -163,6 +165,13 @@ export function useMonthlyTotals(year: number, month: number) {
   });
 }
 
+export function usePendingUpcomingExpenses() {
+  return useQuery({
+    queryKey: expenseKeys.pendingUpcoming,
+    queryFn: getPendingUpcomingExpenses,
+  });
+}
+
 export function useTotalPending() {
   return useQuery({
     queryKey: expenseKeys.totalPending,