Prevent csv export injections (#14347)

**Small Security Issue:** CSV exports were vulnerable to formula
injection attacks when users entered values starting with =, +, -, or @.
(only happens if a logged-in user injects corrupted data)

Solution:
- Added ZWJ (Zero-Width Joiner) protection that prefixes dangerous
values with invisible Unicode character
- This is the best way to preserve original data while preventing Excel
from executing formulas
- Added import cleanup to restore original values when re-importing
 
Changes:
- New sanitizeValueForCSVExport() function for security
- Updated all CSV export paths to use both security + formatting
functions
- Added comprehensive tests covering attack vectors and international
characters
- Also added cursor rules for better code consistency

---------

Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>

packages/twenty-front/src/modules/users/components/UserProvider.tsx

@@ -3,9 +3,9 @@ import { useRecoilValue } from 'recoil';
 
 import { isCurrentUserLoadedState } from '@/auth/states/isCurrentUserLoadedState';
 import { dateTimeFormatState } from '@/localization/states/dateTimeFormatState';
+import { AppPath } from '@/types/AppPath';
 import { UserContext } from '@/users/contexts/UserContext';
 import { useLocation } from 'react-router-dom';
-import { AppPath } from 'twenty-shared/types';
 import { UserOrMetadataLoader } from '~/loading/components/UserOrMetadataLoader';
 import { isMatchingLocation } from '~/utils/isMatchingLocation';
 

packages/twenty-front/src/modules/users/components/UserProviderEffect.tsx

@@ -17,6 +17,7 @@ import { detectTimeFormat } from '@/localization/utils/detectTimeFormat';
 import { detectTimeZone } from '@/localization/utils/detectTimeZone';
 import { getDateFormatFromWorkspaceDateFormat } from '@/localization/utils/getDateFormatFromWorkspaceDateFormat';
 import { getTimeFormatFromWorkspaceTimeFormat } from '@/localization/utils/getTimeFormatFromWorkspaceTimeFormat';
+import { AppPath } from '@/types/AppPath';
 import { getDateFnsLocale } from '@/ui/field/display/utils/getDateFnsLocale.util';
 import { coreViewsState } from '@/views/states/coreViewState';
 import { type CoreViewWithRelations } from '@/views/types/CoreViewWithRelations';
@@ -25,7 +26,7 @@ import { enUS } from 'date-fns/locale';
 import { useEffect } from 'react';
 import { useLocation } from 'react-router-dom';
 import { type APP_LOCALES, SOURCE_LOCALE } from 'twenty-shared/translations';
-import { AppPath, type ObjectPermissions } from 'twenty-shared/types';
+import { type ObjectPermissions } from 'twenty-shared/types';
 import { isDefined } from 'twenty-shared/utils';
 import {
   type WorkspaceMember,