Fix workspace dropdown truncation and center auth titles (#18869)

# Before

<img width="543" height="315" alt="CleanShot 2026-03-23 at 18 37 17"
src="https://github.com/user-attachments/assets/3a8233f8-507d-40e3-b4f0-0aae325bc4a8"
/>


# After

<img width="230" height="167" alt="CleanShot 2026-03-23 at 18 38 06"
src="https://github.com/user-attachments/assets/dda637d8-766a-4dc4-9909-78edef866c88"
/>

+ video: (long & short title)


https://github.com/user-attachments/assets/5373d168-6ffc-495b-909c-27fc1e68e712


also fixed text not centered in onboarding

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-front/src/modules/auth/components/Title.tsx

@@ -15,6 +15,7 @@ const StyledTitle = styled.div<Pick<TitleProps, 'noMarginTop'>>`
   margin-bottom: ${themeCssVariables.spacing[4]};
   margin-top: ${({ noMarginTop }) =>
     !noMarginTop ? themeCssVariables.spacing[4] : '0'};
+  text-align: center;
 `;
 
 export const Title = ({