refactor(ProviderAvatar): update props for clarity and consistency

- Changed the `name` prop to directly use `providerName` for better readability.
- Updated the `getInitials` prop to use `getFirstCharacter` for improved clarity in the component's functionality.

These changes enhance the maintainability and understanding of the ProviderAvatar component.

src/renderer/src/components/ProviderAvatar.tsx

@@ -73,7 +73,8 @@ export const ProviderAvatarPrimitive: React.FC<ProviderAvatarPrimitiveProps> = (
         color,
         ...style
       }}
-      name={getFirstCharacter(providerName)}
+      getInitials={getFirstCharacter}
+      name={providerName}
     />
   )
 }