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/workflow/workflow-steps/workflow-actions/components/WorkflowEditActionSendEmail.tsx

@@ -6,6 +6,7 @@ import { useCommandMenu } from '@/command-menu/hooks/useCommandMenu';
 import { useFindManyRecords } from '@/object-record/hooks/useFindManyRecords';
 import { FormTextFieldInput } from '@/object-record/record-field/ui/form-types/components/FormTextFieldInput';
 import { useTriggerApisOAuth } from '@/settings/accounts/hooks/useTriggerApiOAuth';
+import { SettingsPath } from '@/types/SettingsPath';
 import { Select } from '@/ui/input/components/Select';
 import { GenericDropdownContentWidth } from '@/ui/layout/dropdown/constants/GenericDropdownContentWidth';
 import { useRecoilComponentValue } from '@/ui/utilities/state/component-state/hooks/useRecoilComponentValue';
@@ -18,7 +19,7 @@ import { WorkflowVariablePicker } from '@/workflow/workflow-variables/components
 import { useTheme } from '@emotion/react';
 import { useEffect, useState } from 'react';
 import { useRecoilValue } from 'recoil';
-import { ConnectedAccountProvider, SettingsPath } from 'twenty-shared/types';
+import { ConnectedAccountProvider } from 'twenty-shared/types';
 import { assertUnreachable, isDefined } from 'twenty-shared/utils';
 import { IconPlus, useIcons } from 'twenty-ui/display';
 import { type SelectOption } from 'twenty-ui/input';