fix(web): sync group member nicknames

web/tests/group-member-name.test.ts

@@ -0,0 +1,13 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import { groupMemberDisplayName } from '../src/lib/messages/group-member-name.ts';
+
+test('group nickname wins over a viewer remark or public nickname', () => {
+  assert.equal(groupMemberDisplayName({ user_id: 'usrA', group_nickname: '群里小王', display_name: '好友备注' }), '群里小王');
+});
+
+test('empty group nickname falls back to the usual member name', () => {
+  assert.equal(groupMemberDisplayName({ user_id: 'usrA', group_nickname: ' ', display_name: '公开昵称' }), '公开昵称');
+  assert.equal(groupMemberDisplayName({ user_id: 'usrA' }), 'usrA');
+});