feat(expenses): add monthly totals and pagination support for expenses

apps/frontend/src/lib/api.ts

@@ -158,9 +158,41 @@ export function generateMonthlyExpense(id: number): Promise<Expense> {
   return mutator<Expense>(`/api/periodic-expenses/${id}/generate-month`, "POST");
 }
 
-export function getExpenses(status?: string): Promise<Expense[]> {
-  const params = status ? `?status=${status}` : "";
-  return fetcher<Expense[]>(`/api/expenses${params}`);
+export type MonthlyExpensesTotal = { total: number };
+
+export function getMonthlyPayedTotal(year?: number, month?: number): Promise<MonthlyExpensesTotal> {
+  const params = new URLSearchParams();
+  if (year) params.set("year", String(year));
+  if (month) params.set("month", String(month));
+  return fetcher<MonthlyExpensesTotal>(`/api/expenses/monthly-total?${params}`);
+}
+
+export type PaginatedResponse<T> = {
+  data: T[];
+  total: number;
+  page: number;
+  pageSize: number;
+};
+
+export type MonthlyTotals = {
+  payed: number;
+  pending: number;
+};
+
+export function getExpenses(status?: string, page?: number, pageSize?: number): Promise<PaginatedResponse<Expense>> {
+  const params = new URLSearchParams();
+  if (status) params.set("status", status);
+  if (page) params.set("page", String(page));
+  if (pageSize) params.set("pageSize", String(pageSize));
+  const qs = params.toString();
+  return fetcher<PaginatedResponse<Expense>>(`/api/expenses${qs ? `?${qs}` : ""}`);
+}
+
+export function getMonthlyTotals(year?: number, month?: number): Promise<MonthlyTotals> {
+  const params = new URLSearchParams();
+  if (year) params.set("year", String(year));
+  if (month) params.set("month", String(month));
+  return fetcher<MonthlyTotals>(`/api/expenses/totals?${params}`);
 }
 
 export function createNonPeriodicExpense(data: CreateNonPeriodicExpenseInput): Promise<Expense> {