[Permissions][FE] Design followup 5 (#12793)

## Context
- We now display workspace member full name and email in role assignment
picker
- Replaced Forbidden by "Not shared" with lock icon
- Fix Disabled for Danger accent
- Fix avatar URL

<img width="575" alt="Screenshot 2025-06-23 at 16 38 56"
src="https://github.com/user-attachments/assets/08430bfe-29c4-4ac4-821c-9062dfad7150"
/>
<img width="756" alt="Screenshot 2025-06-23 at 16 21 36"
src="https://github.com/user-attachments/assets/c19f31bd-fe9d-415d-aa55-62fa3e228c49"
/>
<img width="373" alt="Screenshot 2025-06-23 at 17 13 08"
src="https://github.com/user-attachments/assets/e2f7878c-7c5a-40b4-a482-8e99292257c3"
/>
<img width="342" alt="Screenshot 2025-06-23 at 17 37 49"
src="https://github.com/user-attachments/assets/04169e85-14dd-4aed-bd71-7aefd601a894"
/>
<img width="434" alt="Screenshot 2025-06-23 at 17 37 35"
src="https://github.com/user-attachments/assets/7caf0967-c4dd-4d0f-90c8-259a85182b19"
/>

packages/twenty-ui/src/input/button/components/Button/Button.tsx

@@ -293,7 +293,9 @@ const StyledButton = styled('button', {
                   }`
                 : 'none'};
               color: ${!inverted
-                ? theme.font.color.danger
+                ? !disabled
+                  ? theme.font.color.danger
+                  : theme.color.red20
                 : theme.font.color.inverted};
               &:hover {
                 background: ${!inverted