consistent background color in notes (#10097)

fixes #10086 

![image](https://github.com/user-attachments/assets/c8233d63-9020-457f-9ce1-4c88d6dc2019)

![image](https://github.com/user-attachments/assets/3deeb644-eeb1-4073-9ee8-dd08745282f6)

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Co-authored-by: ehconitin <nitinkoche03@gmail.com>

packages/twenty-front/src/modules/ui/layout/show-page/components/ShowPageSubContainer.tsx

@@ -38,6 +38,7 @@ const StyledTabListContainer = styled.div<{ shouldDisplay: boolean }>`
 const StyledContentContainer = styled.div<{ isInRightDrawer: boolean }>`
   flex: 1;
   overflow-y: auto;
+  background: ${({ theme }) => theme.background.primary};
   padding-bottom: ${({ theme, isInRightDrawer }) =>
     isInRightDrawer ? theme.spacing(16) : 0};
 `;