Decouple twenty-ui Avatar from app server-URL config (#21968)

Makes `twenty-ui`'s `Avatar` render the `avatarUrl` it receives instead
of building it from `window._env_`/`window.location` at module load, so
the library no longer depends on the app environment. URL resolution
moves to `twenty-front` via a `getAbsoluteImageUrl` helper applied at
the call sites.

Part of making twenty-ui a standalone library.

packages/twenty-front/src/modules/auth/sign-in-up/components/SignInUpGlobalScopeForm.tsx

@@ -34,6 +34,7 @@ import {
   GetWorkspaceCreationDefaultsDocument,
 } from '~/generated-metadata/graphql';
 import { getWorkspaceUrl } from '~/utils/getWorkspaceUrl';
+import { getAbsoluteImageUrl } from '~/utils/image/getAbsoluteImageUrl';
 
 const StyledWorkspaceContainer = styled.div`
   background-color: ${themeCssVariables.background.secondary};
@@ -172,9 +173,9 @@ export const SignInUpGlobalScopeForm = () => {
                   <StyledWorkspaceContent>
                     <Avatar
                       placeholder={availableWorkspace.displayName || ''}
-                      avatarUrl={
-                        availableWorkspace.logo ?? DEFAULT_WORKSPACE_LOGO
-                      }
+                      avatarUrl={getAbsoluteImageUrl(
+                        availableWorkspace.logo ?? DEFAULT_WORKSPACE_LOGO,
+                      )}
                       size="lg"
                     />
                     <StyledWorkspaceTextContainer>