Change design of confirmation modals in web UI (#30884)

Co-authored-by: Renaud Chaput <renchap@gmail.com>

app/javascript/mastodon/features/ui/components/confirmation_modals/unfollow.tsx

@@ -0,0 +1,50 @@
+import { useCallback } from 'react';
+
+import { defineMessages, FormattedMessage, useIntl } from 'react-intl';
+
+import { unfollowAccount } from 'mastodon/actions/accounts';
+import type { Account } from 'mastodon/models/account';
+import { useAppDispatch } from 'mastodon/store';
+
+import type { BaseConfirmationModalProps } from './confirmation_modal';
+import { ConfirmationModal } from './confirmation_modal';
+
+const messages = defineMessages({
+  unfollowTitle: {
+    id: 'confirmations.unfollow.title',
+    defaultMessage: 'Unfollow user?',
+  },
+  unfollowConfirm: {
+    id: 'confirmations.unfollow.confirm',
+    defaultMessage: 'Unfollow',
+  },
+});
+
+export const ConfirmUnfollowModal: React.FC<
+  {
+    account: Account;
+  } & BaseConfirmationModalProps
+> = ({ account, onClose }) => {
+  const intl = useIntl();
+  const dispatch = useAppDispatch();
+
+  const onConfirm = useCallback(() => {
+    dispatch(unfollowAccount(account.id));
+  }, [dispatch, account.id]);
+
+  return (
+    <ConfirmationModal
+      title={intl.formatMessage(messages.unfollowTitle)}
+      message={
+        <FormattedMessage
+          id='confirmations.unfollow.message'
+          defaultMessage='Are you sure you want to unfollow {name}?'
+          values={{ name: <strong>@{account.acct}</strong> }}
+        />
+      }
+      confirm={intl.formatMessage(messages.unfollowConfirm)}
+      onConfirm={onConfirm}
+      onClose={onClose}
+    />
+  );
+};