feat(expenses): add edit amount and due date for pending expenses

apps/frontend/src/lib/api.ts

@@ -154,6 +154,11 @@ export type PayExpenseInput = {
   paymentDate?: string;
 };
 
+export type UpdateExpenseInput = {
+  amount: number;
+  dueDate: string;
+};
+
 export function getPeriodicExpenses(): Promise<PeriodicExpense[]> {
   return fetcher<PeriodicExpense[]>("/api/periodic-expenses");
 }
@@ -263,6 +268,13 @@ export function payExpense(
   return mutator<Expense>(`/api/expenses/${id}/pay`, "PUT", data);
 }
 
+export function updateExpense(
+  id: number,
+  data: UpdateExpenseInput,
+): Promise<Expense> {
+  return mutator<Expense>(`/api/expenses/${id}`, "PUT", data);
+}
+
 export type ImportResult = {
   imported: number;
   skipped: number;