fix: Enable Lingui recommended rules and fix all translation violations (#14133)

- Enable lingui/no-single-variables-to-translate and all other
recommended Lingui rules
- Fix single variable translation patterns (t`${variable}` → variable)
- Fix expression-in-message violations by extracting variables
- Fix t-call-in-function violations by moving translations inside
functions
- Update ESLint configs to use linguiPlugin.configs['flat/recommended']
- Clean up unused imports and improve translation patterns

packages/twenty-front/src/modules/error-handler/components/AppRootErrorFallback.tsx

@@ -100,7 +100,7 @@ const StyledIcon = styled(IconReload)`
 
 export const AppRootErrorFallback = ({
   resetErrorBoundary,
-  title = 'Sorry, something went wrong',
+  title = t`Sorry, something went wrong`,
 }: AppRootErrorFallbackProps) => {
   return (
     <StyledContainer>
@@ -117,7 +117,7 @@ export const AppRootErrorFallback = ({
             />
           </StyledImageContainer>
           <StyledEmptyTextContainer>
-            <StyledEmptyTitle>{t`${title}`}</StyledEmptyTitle>
+            <StyledEmptyTitle>{title}</StyledEmptyTitle>
             <StyledEmptySubTitle>
               {t`Please refresh the page.`}
             </StyledEmptySubTitle>