update

server.js

@@ -867,6 +867,29 @@ app.delete('/api/chat/conversations/:id', (req, res) => {
   res.json({ success: true, message: conv.type === 'group' ? '群组已解散' : '会话已删除' });
 });
 
+// 移除群成员（群主可移除任意成员，群主本人不可被移除）
+app.delete('/api/chat/conversations/:id/members/:userId', (req, res) => {
+  const conv = db.prepare('SELECT * FROM conversations WHERE id = ?').get(req.params.id);
+  if (!conv || conv.type !== 'group') {
+    return res.status(404).json({ success: false, message: '群聊不存在' });
+  }
+  if (!isConversationMember(conv.id, req.user.id)) {
+    return res.status(403).json({ success: false, message: '您不是该群聊的成员' });
+  }
+  const targetId = req.params.userId;
+  if (targetId === conv.creator_id) {
+    return res.status(400).json({ success: false, message: '群主不能被移除' });
+  }
+  if (!isConversationMember(conv.id, targetId)) {
+    return res.status(404).json({ success: false, message: '该用户不在群聊中' });
+  }
+  if (req.user.id !== conv.creator_id) {
+    return res.status(403).json({ success: false, message: '只有群主可以移除群成员' });
+  }
+  db.prepare('DELETE FROM conversation_members WHERE conversation_id = ? AND user_id = ?').run(conv.id, targetId);
+  res.json({ success: true, message: '已将该成员移出群聊' });
+});
+
 // ==================== 认证 API ====================
 
 // 登录