refactor: replace ignored numeric literals with constants

src/modules/banking/bank-cards/application/bank-card-input.ts

@@ -5,6 +5,7 @@ import {
 } from '@nestjs/common';
 import { createHash } from 'node:crypto';
 
+import { ISO_DATE_LENGTH, ISO_DATE_START } from '../../../../common/time';
 import {
   MAX_CARD_NAME_LENGTH,
   MAX_OPERATION_DESCRIPTION_LENGTH,
@@ -18,6 +19,9 @@ import {
   CreateBankOperationDto,
 } from '../presentation/bank-card.dto';
 
+const NEXT_MONTH_OFFSET = 1;
+const PREVIOUS_MONTH_LAST_DAY = 0;
+
 export const BankErrorCode = {
   InvalidInput: 'BANK_INVALID_INPUT',
   VersionConflict: 'BANK_VERSION_CONFLICT',
@@ -45,8 +49,8 @@ export function periodBounds(query: BankPeriodQueryDto) {
     const from = `${query.month}-01`;
     if (!isCalendarDate(from)) return fail();
     const end = new Date(`${from}T00:00:00Z`);
-    end.setUTCMonth(end.getUTCMonth() + 1, 0);
-    return { from, to: end.toISOString().slice(0, 10) };
+    end.setUTCMonth(end.getUTCMonth() + NEXT_MONTH_OFFSET, PREVIOUS_MONTH_LAST_DAY);
+    return { from, to: end.toISOString().slice(ISO_DATE_START, ISO_DATE_LENGTH) };
   }
   if (
     query.month ||