add api for update is paid to expense

internal/modules/expenses/controllers/expense.controller.go

@@ -481,6 +481,27 @@ func (u *ExpenseController) CompleteExpense(c *fiber.Ctx) error {
 		})
 }
 
+func (u *ExpenseController) Pay(c *fiber.Ctx) error {
+	expenseID := c.Params("id")
+	id, err := strconv.Atoi(expenseID)
+	if err != nil {
+		return fiber.NewError(fiber.StatusBadRequest, "Invalid expense ID")
+	}
+
+	expense, err := u.ExpenseService.Pay(c, uint(id))
+	if err != nil {
+		return err
+	}
+
+	return c.Status(fiber.StatusOK).
+		JSON(response.Success{
+			Code:    fiber.StatusOK,
+			Status:  "success",
+			Message: "Pay expense successfully",
+			Data:    expense,
+		})
+}
+
 func ensureExpenseBulkApprovalPermission(c *fiber.Ctx, targetStep approvalutils.ApprovalStep) error {
 	requiredPerms := []string{}