Fix aggregate bar (#11620)

Closes https://github.com/twentyhq/twenty/issues/10943

Also adds stories:
<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/377059b1-f6b5-4d8c-b7d1-e74e70448445"
/>

packages/twenty-ui/src/layout/animated-placeholder/components/AnimatedPlaceholder.tsx

@@ -12,6 +12,7 @@ const StyledContainer = styled.div`
   align-items: center;
   justify-content: center;
   position: relative;
+  min-height: 100px;
 `;
 
 interface StyledImageProps {