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/command-menu/components/CommandMenuRouter.tsx

@@ -8,12 +8,12 @@ import { commandMenuPageState } from '@/command-menu/states/commandMenuPageState
 import { CommandMenuPageComponentInstanceContext } from '@/command-menu/states/contexts/CommandMenuPageComponentInstanceContext';
 import { objectMetadataItemsState } from '@/object-metadata/states/objectMetadataItemsState';
 import { CoreObjectNameSingular } from '@/object-metadata/types/CoreObjectNameSingular';
+import { SettingsPath } from '@/types/SettingsPath';
 import { useTheme } from '@emotion/react';
 import styled from '@emotion/styled';
 import { motion } from 'framer-motion';
 import { useLocation } from 'react-router-dom';
 import { useRecoilValue } from 'recoil';
-import { SettingsPath } from 'twenty-shared/types';
 import { isDefined } from 'twenty-shared/utils';
 
 const StyledCommandMenuContent = styled.div`

packages/twenty-front/src/modules/command-menu/components/CommandMenuTopBar.tsx

@@ -20,7 +20,6 @@ import { AnimatePresence, motion } from 'framer-motion';
 import { useRef } from 'react';
 import { useLocation } from 'react-router-dom';
 import { useRecoilState, useRecoilValue } from 'recoil';
-import { AppBasePath } from 'twenty-shared/types';
 import { isDefined } from 'twenty-shared/utils';
 import { IconChevronLeft, IconX } from 'twenty-ui/display';
 import { Button } from 'twenty-ui/input';
@@ -106,8 +105,8 @@ export const CommandMenuTopBar = () => {
 
   const location = useLocation();
   const isButtonVisible =
-    !location.pathname.startsWith(`${AppBasePath.Root}objects/`) &&
-    !location.pathname.startsWith(`${AppBasePath.Root}object/`);
+    !location.pathname.startsWith('/objects/') &&
+    !location.pathname.startsWith('/object/');
 
   const backButtonAnimationDuration =
     contextChips.length > 0 ? theme.animation.duration.instant : 0;