fix: даты «только дата» больше не сдвигаются на день назад

SharePoint хранит поле «только дата» как полночь по поясу сайта (UTC+5)
в UTC: «05.10» приходит из REST как 2026-10-04T19:00:00Z. Формы брали
первые 10 символов и показывали 04.10, а каждое пересохранение (полное
право, исполнитель, повторная отправка) записывало дату ещё на день раньше.

Чтение всех дат идёт через spDateOnlyToIso (округление до ближайшей
полуночи UTC), «сегодня» — через todayIsoDate вместо toISOString, который
до 05:00 давал вчерашнее число. Уже сдвинутые записи в SP не исправляются.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/webparts/requestPortal/forms/BusinessTrip/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA } from './model';
 import { parseTasks } from './tripData';
 import { parseRoute } from './route';
@@ -42,8 +43,7 @@ export async function loadBusinessTripRequest(itemId: number, listId?: string):
 
   const data: IFormData = {
     ...EMPTY_DATA,
-    // Колонка «только дата» — время в ответе нулевое, берём дату как есть.
+    SubmitDate: spDateOnlyToIso(item.SubmitDate),
-    SubmitDate: typeof item.SubmitDate === 'string' ? item.SubmitDate.slice(0, 10) : '',
     Employee: employee?.EMail || '',
     Position: (item.Position as string) || '',
     Organization: (item.Organization as string) || '',

src/webparts/requestPortal/forms/Clearance/ClearanceForm.tsx

@@ -30,6 +30,7 @@ import {
 import { IRequestFormProps } from '../../models/types';
 import { getEmployeeOrganizations, formatEmployeeOrganizations } from '../../shared/dictionary';
 import { friendlyErrorMessage } from '../../shared/diagnostics';
+import { todayIsoDate } from '../../shared/dateUtils';
 import {
   approvalListTitle,
   approvalListTitleForListId,
@@ -109,7 +110,7 @@ const ClearanceForm: React.FC<IRequestFormProps> = ({
     if (editId) {
       return;
     }
-    const today = new Date().toISOString().slice(0, 10);
+    const today = todayIsoDate();
     setData((prev) => ({ ...prev, TerminationDate: prev.TerminationDate || today }));
   }, [editId]);
 

src/webparts/requestPortal/forms/Clearance/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA } from './model';
 
 /** Число или '' (SharePoint отдаёт null для незаполненного Number). */
@@ -60,7 +61,7 @@ export async function loadClearanceRequest(itemId: number, listId?: string): Pro
     Employee: employee?.EMail || '',
     Position: (item.Position as string) || '',
     Department: (item.Department as string) || '',
-    TerminationDate: termination.slice(0, 10), // ISO → YYYY-MM-DD для input type=date
+    TerminationDate: spDateOnlyToIso(termination),
     ParkingCard: !!item.ParkingCard,
     AccessCard: !!item.AccessCard,
     // Хранится в WriteOffTrainingAmount, не в одноимённом TrainingAmount — см.

src/webparts/requestPortal/forms/ConcreteRequest/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, IConcreteItem, EMPTY_DATA } from './model';
 
 export interface ILoadedRequest {
@@ -53,7 +54,7 @@ export async function loadConcreteRequest(itemId: number, listId?: string): Prom
 
   const data: IFormData = {
     ...EMPTY_DATA,
-    RequestDate: requestDate.slice(0, 10), // ISO → YYYY-MM-DD для input type=date
+    RequestDate: spDateOnlyToIso(requestDate),
     SiteChiefEmail: (item.SiteChiefEmail as string) || '',
     SiteChiefName: (item.SiteChiefName as string) || '',
     ForemanEmail: (item.ForemanEmail as string) || '',

src/webparts/requestPortal/forms/Dismissal/createClearance.ts

@@ -16,6 +16,7 @@ import {
   dataListTitleForListId
 } from '../../shared/listTitles';
 import { requestLinkUrl } from '../../shared/routing';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID as CLEARANCE_FORM_ID, EMPTY_DATA as CLEARANCE_EMPTY, IFormData as IClearanceData } from '../Clearance/model';
 import { clearanceApprovalService, saveClearanceRequest } from '../Clearance/submit';
 import { FORM_ID, primaryPosition, zipOrganization } from './model';
@@ -136,7 +137,7 @@ export async function ensureClearanceForDismissal(
     Position: position,
     Department: department,
     // Последний рабочий день заявления = дата расторжения договора в обходном листе.
-    TerminationDate: ((item.LastWorkingDay as string) || '').slice(0, 10),
+    TerminationDate: spDateOnlyToIso(item.LastWorkingDay),
     Organization: organizationText
   };
 

src/webparts/requestPortal/forms/Dismissal/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA, zipOrganization } from './model';
 
 export interface ILoadedRequest {
@@ -47,7 +48,7 @@ export async function loadDismissalRequest(itemId: number, listId?: string): Pro
   const data: IFormData = {
     ...EMPTY_DATA,
     Employee: employee?.EMail || '',
-    LastWorkingDay: lastDay.slice(0, 10), // ISO → YYYY-MM-DD для input type=date
+    LastWorkingDay: spDateOnlyToIso(lastDay),
     Phone: (item.Phone as string) || '',
     Comment: (item.Comment as string) || '',
     Organization: zipOrganization(item.Organization, item.Department, item.Position),

src/webparts/requestPortal/forms/EmployeeTransfer/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA } from './model';
 
 export interface ILoadedRequest {
@@ -47,7 +48,7 @@ export async function loadEmployeeTransferRequest(itemId: number, listId?: strin
     Employee: employee?.EMail || '',
     Position: (item.Position as string) || '',
     Organization: (item.Organization as string) || '',
-    TransferDate: transferDate.slice(0, 10), // ISO → YYYY-MM-DD для input type=date
+    TransferDate: spDateOnlyToIso(transferDate),
     NewPosition: (item.NewPosition as string) || '',
     NewDepartment: (item.NewDepartment as string) || '',
     NewDepartmentId: (item.NewDepartmentId as string) || '',

src/webparts/requestPortal/forms/RecruitingHire/load.ts

@@ -1,6 +1,7 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { ICompany } from '../../shared/dictionary';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { IFieldChange, parseFieldChanges } from '../../shared/fieldChanges/fieldChanges';
 import { FORM_ID, IFormData, EMPTY_DATA, ICompanyShare, LEGACY_HIRE_TYPES } from './model';
 import { APPROVER_CHANGES_FIELD } from './changeTracking';
@@ -76,7 +77,7 @@ export async function loadHireRequest(itemId: number, listId?: string): Promise<
     if (value === null || value === undefined) {
       writable[key] = '';
     } else if (key === 'HireHireDate' && typeof value === 'string') {
-      writable[key] = value.slice(0, 10); // ISO → YYYY-MM-DD для input type=date
+      writable[key] = spDateOnlyToIso(value);
     } else {
       writable[key] = String(value);
     }

src/webparts/requestPortal/forms/RecruitingSelection/load.ts

@@ -1,6 +1,7 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { ICompany } from '../../shared/dictionary';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { IFieldChange, parseFieldChanges } from '../../shared/fieldChanges/fieldChanges';
 import { FORM_ID, IFormData, EMPTY_DATA, ILanguageLevel } from './model';
 import { APPROVER_CHANGES_FIELD } from './changeTracking';
@@ -103,7 +104,7 @@ export async function loadSelectionRequest(itemId: number, listId?: string): Pro
       if (value === null || value === undefined) {
         writable[key] = '';
       } else if (DATE_FIELDS.indexOf(key) !== -1 && typeof value === 'string') {
-        writable[key] = value.slice(0, 10); // ISO → YYYY-MM-DD для input type=date
+        writable[key] = spDateOnlyToIso(value);
       } else {
         writable[key] = String(value);
       }

src/webparts/requestPortal/forms/Referral/load.ts

@@ -1,6 +1,7 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { ICompany } from '../../shared/dictionary';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA } from './model';
 
 /** Безопасный разбор JSON-массива из Note-колонки (пустой при ошибке/пустом). */
@@ -72,7 +73,7 @@ export async function loadReferralRequest(itemId: number, listId?: string): Prom
 
   const data: IFormData = {
     ...EMPTY_DATA,
-    SubmitDate: submitDate.slice(0, 10), // ISO → YYYY-MM-DD для input type=date
+    SubmitDate: spDateOnlyToIso(submitDate),
     Referrer: referrer?.EMail || '',
     ReferrerPosition: (item.ReferrerPosition as string) || '',
     ReferrerDepartment: (item.ReferrerDepartment as string) || '',

src/webparts/requestPortal/forms/ServiceRequest/ServiceRequestForm.tsx

@@ -35,6 +35,7 @@ import {
 import { effectiveUserEmail } from '../../shared/impersonation';
 import { getEmployeeOrganizations, formatEmployeeOrganizations } from '../../shared/dictionary';
 import { friendlyErrorMessage } from '../../shared/diagnostics';
+import { todayIsoDate } from '../../shared/dateUtils';
 import { IRequestFormProps } from '../../models/types';
 import {
   approvalListTitle,
@@ -82,7 +83,7 @@ const ServiceRequestForm: React.FC<IRequestFormProps> = ({
       return;
     }
     const user = context.pageContext.user;
-    const today = new Date().toISOString().slice(0, 10);
+    const today = todayIsoDate();
     const requesterEmail = effectiveUserEmail(context);
     setData((prev) => ({
       ...prev,

src/webparts/requestPortal/forms/ServiceRequest/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { parseGroupedJson } from './cost';
 import { FORM_ID, IFormData, EMPTY_DATA, EMPTY_ANNEX_ROW, IAnnexRow } from './model';
 
@@ -57,7 +58,7 @@ function parseRows<T>(raw: unknown): T[] {
 
 /** ISO-дата из SharePoint → YYYY-MM-DD для input type=date. */
 function toDateInput(raw: unknown): string {
-  return typeof raw === 'string' ? raw.slice(0, 10) : '';
+  return spDateOnlyToIso(raw);
 }
 
 /**

src/webparts/requestPortal/forms/SkudExplanation/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA } from './model';
 import { parseMissedDays } from './missedDaysJson';
 import { toDateKey } from './skud/skudDays';
@@ -52,8 +53,7 @@ export async function loadSkudExplanationRequest(itemId: number, listId?: string
 
   const data: IFormData = {
     ...EMPTY_DATA,
-    // Колонка «только дата» — время в ответе нулевое, берём дату как есть (как в Referral/load.ts).
+    SubmitDate: spDateOnlyToIso(item.SubmitDate),
-    SubmitDate: ((item.SubmitDate as string) || '').slice(0, 10),
     Employee: employee?.EMail || '',
     EmployeeFio: (item.SkudEmployeeFio as string) || employee?.Title || '',
     Position: (item.Position as string) || '',

src/webparts/requestPortal/forms/SkudExplanation/skud/holidays.service.ts

@@ -1,6 +1,7 @@
 import { SPHttpClient } from '@microsoft/sp-http';
 import { WebPartContext } from '@microsoft/sp-webpart-base';
 import { HOLIDAYS_LIST_TITLE, HOLIDAYS_SITE_URL } from '../../../shared/config';
+import { spDateOnlyToIso } from '../../../shared/dateUtils';
 
 interface IHolidayItem {
   Title?: string;
@@ -25,7 +26,7 @@ async function fetchHolidays(context: WebPartContext): Promise<Map<string, strin
   const body = (await response.json()) as { value?: IHolidayItem[] };
   const map = new Map<string, string>();
   (body.value || []).forEach((item) => {
-    if (item.holidayDate) map.set(item.holidayDate.slice(0, 10), stripParens(item.Title || ''));
+    if (item.holidayDate) map.set(spDateOnlyToIso(item.holidayDate), stripParens(item.Title || ''));
   });
   return map;
 }

src/webparts/requestPortal/forms/TmcTransfer/TmcTransferForm.tsx

@@ -50,6 +50,7 @@ import { requestLinkUrl } from '../../shared/routing';
 import { writeDemandLinePortalLink } from '../../shared/dataverse/demandLine.service';
 import { resolveLzkProjectId } from '../../shared/dataverse/lzkPosition.service';
 import { friendlyErrorMessage } from '../../shared/diagnostics';
+import { todayIsoDate } from '../../shared/dateUtils';
 import { IRequestFormProps } from '../../models/types';
 import {
   approvalListTitle,
@@ -120,7 +121,7 @@ const TmcTransferForm: React.FC<IRequestFormProps> = ({
       return;
     }
     const user = context.pageContext.user;
-    const today = new Date().toISOString().slice(0, 10);
+    const today = todayIsoDate();
     const requesterEmail = effectiveUserEmail(context);
     setData((prev) => ({
       ...prev,

src/webparts/requestPortal/forms/TmcTransfer/load.ts

@@ -1,6 +1,7 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { ILineItem } from '../../shared/ui';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA } from './model';
 
 export interface ILoadedRequest {
@@ -70,7 +71,7 @@ export async function loadTmcTransferRequest(itemId: number, listId?: string): P
     Department: (item.Department as string) || '',
     DepartmentId: (item.DepartmentId as string) || '',
     Subject: (item.Subject as string) || '',
-    RequestDate: requestDate.slice(0, 10), // ISO → YYYY-MM-DD для input type=date
+    RequestDate: spDateOnlyToIso(requestDate),
     SourceProject: (item.SourceProject as string) || '',
     SourceProjectId: (item.SourceProjectId as string) || '',
     SourceProjectManager: (item.SourceProjectManager as string) || '',

src/webparts/requestPortal/forms/UnpaidLeave/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA } from './model';
 
 export interface ILoadedRequest {
@@ -51,8 +52,8 @@ export async function loadUnpaidLeaveRequest(itemId: number, listId?: string): P
     ...EMPTY_DATA,
     Employee: employee?.EMail || '',
     Position: (item.Position as string) || '',
-    StartDate: start.slice(0, 10), // ISO → YYYY-MM-DD для input type=date
+    StartDate: spDateOnlyToIso(start),
-    EndDate: end.slice(0, 10),
+    EndDate: spDateOnlyToIso(end),
     Reason: (item.Reason as string) || '',
     Substitute: substitute?.EMail || '',
     Organization: (item.Organization as string) || '',

src/webparts/requestPortal/forms/Vacation/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { FORM_ID, IFormData, EMPTY_DATA } from './model';
 
 export interface ILoadedRequest {
@@ -50,7 +51,7 @@ export async function loadVacationRequest(itemId: number, listId?: string): Prom
     ...EMPTY_DATA,
     Employee: employee?.EMail || '',
     Position: (item.Position as string) || '',
-    StartDate: start.slice(0, 10), // ISO → YYYY-MM-DD для input type=date
+    StartDate: spDateOnlyToIso(start),
     DaysCount: days === null || days === undefined ? '' : String(days),
     Substitute: substitute?.EMail || '',
     Organization: (item.Organization as string) || '',

src/webparts/requestPortal/forms/WorkplaceSetup/load.ts

@@ -1,5 +1,6 @@
 import { getSP } from '../../shared/pnp/pnpjs';
 import { dataListTitle } from '../../shared/listTitles';
+import { spDateOnlyToIso } from '../../shared/dateUtils';
 import { ICompany } from '../../shared/dictionary';
 import { COMPANIES_JSON_FIELD, FORM_ID, IFormData, EMPTY_DATA } from './model';
 
@@ -52,7 +53,7 @@ export async function loadWorkplaceRequest(itemId: number, listId?: string): Pro
     if (value === null || value === undefined) {
       writable[key] = '';
     } else if (key === 'StartDate' && typeof value === 'string') {
-      writable[key] = value.slice(0, 10);
+      writable[key] = spDateOnlyToIso(value);
     } else {
       writable[key] = String(value);
     }

src/webparts/requestPortal/shared/dateUtils.test.ts

@@ -0,0 +1,51 @@
+import { spDateOnlyToIso } from './dateUtils';
+
+// SharePoint хранит поле «только дата» как полночь по поясу САЙТА, переведённую
+// в UTC, — поэтому «5 октября» приходит из REST как предыдущий день по UTC.
+describe('spDateOnlyToIso', () => {
+  it('сайт в UTC+5 (Астана с 2024): 04T19:00Z → 5-е', () => {
+    expect(spDateOnlyToIso('2026-10-04T19:00:00Z')).toBe('2026-10-05');
+  });
+
+  it('сайт в UTC+6 (старый пояс Астаны): 04T18:00Z → 5-е', () => {
+    expect(spDateOnlyToIso('2026-10-04T18:00:00Z')).toBe('2026-10-05');
+  });
+
+  it('сайт в UTC: 05T00:00Z → 5-е', () => {
+    expect(spDateOnlyToIso('2026-10-05T00:00:00Z')).toBe('2026-10-05');
+  });
+
+  it('переход через месяц и год', () => {
+    expect(spDateOnlyToIso('2026-09-30T19:00:00Z')).toBe('2026-10-01');
+    expect(spDateOnlyToIso('2026-12-31T19:00:00Z')).toBe('2027-01-01');
+  });
+
+  it('високосный год: 28 февраля → 29-е', () => {
+    expect(spDateOnlyToIso('2028-02-28T19:00:00Z')).toBe('2028-02-29');
+  });
+
+  it('строку без времени возвращает как есть', () => {
+    expect(spDateOnlyToIso('2026-10-05')).toBe('2026-10-05');
+  });
+
+  it('пустое/отсутствующее значение → пустая строка', () => {
+    expect(spDateOnlyToIso('')).toBe('');
+    expect(spDateOnlyToIso(null)).toBe('');
+    expect(spDateOnlyToIso(undefined)).toBe('');
+  });
+
+  it('повторное сохранение не сдвигает дату (запись → чтение → запись)', () => {
+    // Имитация: SP вернул 04T19:00Z, мы прочитали, сохранили обратно «как есть»,
+    // SP снова хранит 04T19:00Z — дата обязана остаться 5-м, а не уехать на 4-е.
+    const firstRead = spDateOnlyToIso('2026-10-04T19:00:00Z');
+    expect(firstRead).toBe('2026-10-05');
+    const secondRead = spDateOnlyToIso(`${addDays(firstRead, -1)}T19:00:00Z`);
+    expect(secondRead).toBe(firstRead);
+  });
+});
+
+function addDays(isoDate: string, days: number): string {
+  const d = new Date(`${isoDate}T00:00:00Z`);
+  d.setUTCDate(d.getUTCDate() + days);
+  return d.toISOString().slice(0, 10);
+}

src/webparts/requestPortal/shared/dateUtils.ts

@@ -25,6 +25,30 @@ export function isoDatePlusMonths(months: number): string {
   return `${d.getFullYear()}-${pad2(d.getMonth() + 1)}-${pad2(d.getDate())}`;
 }
 
+/** Сегодня по МЕСТНОМУ времени в формате YYYY-MM-DD (toISOString дал бы дату по UTC — до 05:00 вчерашнюю). */
+export function todayIsoDate(): string {
+  return isoDatePlusDays(0);
+}
+
+const HALF_DAY_MS = 12 * 60 * 60 * 1000;
+
+/**
+ * Значение поля SharePoint «только дата» → YYYY-MM-DD для input type=date.
+ *
+ * REST отдаёт такие поля в UTC: «5 октября» на сайте с поясом UTC+5 приходит
+ * как «2026-10-04T19:00:00Z», и `slice(0, 10)` давал 4-е число (а каждое
+ * пересохранение сдвигало дату ещё на день назад). Округляем до ближайшей
+ * полуночи UTC (+12 ч) — так верно для любого пояса сайта в пределах ±11 ч и
+ * не зависит от пояса браузера.
+ */
+export function spDateOnlyToIso(value: unknown): string {
+  if (typeof value !== 'string' || value === '') return '';
+  if (value.indexOf('T') < 0) return value.slice(0, 10);
+  const ms = Date.parse(value);
+  if (isNaN(ms)) return value.slice(0, 10);
+  return new Date(ms + HALF_DAY_MS).toISOString().slice(0, 10);
+}
+
 /** YYYY-MM-DD → дд.мм.гггг, для текста ошибок валидации. Невалидную строку возвращает как есть. */
 export function formatIsoDate(iso: string): string {
   const [y, m, d] = iso.split('-');