feat(admin): adapt new config system (#11360)

feat(server): add test mail api

feat(admin): adapt new config system

packages/frontend/admin/src/modules/settings/operations/send-test-email.tsx

@@ -0,0 +1,32 @@
+import { Button } from '@affine/admin/components/ui/button';
+import { useMutation } from '@affine/admin/use-mutation';
+import { notify } from '@affine/component';
+import type { UserFriendlyError } from '@affine/error';
+import { sendTestEmailMutation } from '@affine/graphql';
+import { useCallback } from 'react';
+
+import type { AppConfig } from '../config';
+
+export function SendTestEmail({ appConfig }: { appConfig: AppConfig }) {
+  const { trigger } = useMutation({
+    mutation: sendTestEmailMutation,
+  });
+
+  const onClick = useCallback(() => {
+    trigger(appConfig.mailer.SMTP)
+      .then(() => {
+        notify.success({
+          title: 'Test email sent',
+          message: 'The test email has been successfully sent.',
+        });
+      })
+      .catch((err: UserFriendlyError) => {
+        notify.error({
+          title: 'Failed to send test email',
+          message: err.message,
+        });
+      });
+  }, [appConfig, trigger]);
+
+  return <Button onClick={onClick}>Send Test Email</Button>;
+}