feat(channel): 支持安全删除渠道并保留历史数据

web/src/pages/agent/Settings.tsx

@@ -2,7 +2,7 @@ import { useEffect, useMemo, useState } from 'react'
 import { Button, Form, message } from 'antd'
 import { PlusOutlined } from '@ant-design/icons'
 import {
-  createChannel, createStaff, deleteStaff,
+  createChannel, createStaff, deleteChannel as deleteChannelApi, deleteStaff,
   getChannels, getCustomerTags, getStaff, getTenantSettings,
   updateChannel, updateStaff, updateTenantSettings,
   type Channel, type CustomerTag, type StaffUser, type TenantSettings, type WelcomeSegment,
@@ -288,6 +288,17 @@ const Settings = () => {
     }
   }
 
+  const handleDeleteChannel = async (channel: Channel) => {
+    try {
+      await deleteChannelApi(channel.id)
+      setChannels(previous => previous.filter(item => item.id !== channel.id))
+      message.success('渠道已删除，原嵌入代码立即失效')
+    } catch (e) {
+      message.error(e instanceof Error ? e.message : '删除失败')
+      throw e
+    }
+  }
+
   const addChannelType = async (t: string) => {
     try {
       await createChannel({ type: t, name: typeMeta[t].label })
@@ -410,6 +421,7 @@ const Settings = () => {
                 ensureWebChannel={addWebChannel}
                 addChannelType={addChannelType}
                 updateChannelMeta={updateChannelMeta}
+                deleteChannel={handleDeleteChannel}
               />
             )}
 

web/src/pages/agent/settings/ChannelsSection.tsx

@@ -1,6 +1,6 @@
 import { useState } from 'react'
-import { Button, Empty, Form, Input, Modal, Spin, Switch, message } from 'antd'
-import { CopyOutlined, EditOutlined, LinkOutlined, PlusOutlined } from '@ant-design/icons'
+import { Button, Empty, Form, Input, Modal, Popconfirm, Spin, Switch, message } from 'antd'
+import { CopyOutlined, DeleteOutlined, EditOutlined, LinkOutlined, PlusOutlined } from '@ant-design/icons'
 import type { Channel } from '@/services/api'
 import { typeMeta } from './channelMeta'
 
@@ -27,6 +27,7 @@ interface ChannelsSectionProps {
   ensureWebChannel: () => void
   addChannelType: (t: string) => void
   updateChannelMeta: (id: number, data: { name?: string; site_domain?: string }) => Promise<void>
+  deleteChannel: (channel: Channel) => Promise<void>
 }
 
 /** 渠道管理：接入渠道列表与嵌入代码 */
@@ -39,6 +40,7 @@ const ChannelsSection = ({
   ensureWebChannel,
   addChannelType,
   updateChannelMeta,
+  deleteChannel,
 }: ChannelsSectionProps) => {
   const [form] = Form.useForm()
   const [editing, setEditing] = useState<Channel | null>(null)
@@ -108,12 +110,30 @@ const ChannelsSection = ({
                           {enabled ? '已启用' : '未启用'}
                         </span>
                       </div>
-                      <Switch
-                        checked={enabled}
-                        size="small"
-                        loading={togglingId === ch.id}
-                        onChange={v => toggleChannel(ch, v)}
-                      />
+                      <div className="flex items-center gap-2 shrink-0">
+                        <Switch
+                          checked={enabled}
+                          size="small"
+                          loading={togglingId === ch.id}
+                          onChange={v => toggleChannel(ch, v)}
+                        />
+                        <Popconfirm
+                          title={`删除「${ch.name || meta.label}」？`}
+                          description="删除后原渠道 Key 和嵌入代码立即失效，历史会话仍会保留。"
+                          okText="删除"
+                          cancelText="取消"
+                          okButtonProps={{ danger: true }}
+                          onConfirm={() => deleteChannel(ch)}
+                        >
+                          <Button
+                            type="text"
+                            size="small"
+                            danger
+                            icon={<DeleteOutlined />}
+                            title="删除渠道"
+                          />
+                        </Popconfirm>
+                      </div>
                     </div>
                     {ch.type === 'web' && (
                       <div className="flex items-center gap-2 text-xs mb-2">