feat(web): restore legacy channel editor

apps/web_v1/scripts/structure-check.mjs

@@ -136,8 +136,12 @@ for (const required of ['status-online-dot', 'status-upgrade', 'status-system',
   if (!statusbarSource.includes(required)) failures.push(`project statusbar must restore ${required}`)
 }
 
+const newChannelSource = readFileSync('src/pages/projects/project-new-channel.tsx', 'utf8')
+for (const required of ['保存频道', '频道名称', '频道类型', '链接地址', '创建后可接入的内容']) {
+  if (!newChannelSource.includes(required)) failures.push(`new channel page must restore ${required}`)
+}
+
 const unsupportedControls = [
-  { file: 'src/pages/projects/project-new-channel.tsx', required: '暂未开放', forbidden: ['保存频道', '<Input', '<Select', '<TextArea'] },
   { file: 'src/pages/projects/project-topbar.tsx', forbidden: ['停靠左边', '停靠右边', 'DockIcon', 'isDesktopRuntime'] },
 ]
 for (const check of unsupportedControls) {

apps/web_v1/scripts/visual-check.mjs

@@ -229,6 +229,8 @@ for (const channel of [
       foundPage: Boolean(pageNode),
       heading,
       activeChannel,
+      inputCount: pageNode?.querySelectorAll('input, textarea').length ?? 0,
+      hasSaveChannel: [...(pageNode?.querySelectorAll('button') ?? [])].some((button) => button.textContent?.includes('保存频道')),
     }
   }, channel))
 }
@@ -403,6 +405,9 @@ for (const check of channelPageChecks) {
   if (!check.activeChannel.includes(check.label)) {
     failures.push(`expected ${check.label} sidebar button to stay active, got ${JSON.stringify(check.activeChannel)}`)
   }
+  if (check.label === '新建频道' && (check.inputCount < 4 || !check.hasSaveChannel)) {
+    failures.push(`expected legacy new channel editor, got inputs=${check.inputCount}, save=${check.hasSaveChannel}`)
+  }
 }
 
 if (failures.length) {

apps/web_v1/src/pages/projects/project-new-channel.tsx

@@ -1,7 +1,9 @@
-import { Card, Empty, Typography } from '@arco-design/web-react'
+import { Button, Card, Input, Select, Space, Tag, Typography } from '@arco-design/web-react'
+import { IconApps, IconLink, IconPlus } from '@arco-design/web-react/icon'
 import type { ProjectWorkspace } from './project-types'
 
 const { Title, Text } = Typography
+const { TextArea } = Input
 
 export function ProjectNewChannel({ activeWorkspace }: { activeWorkspace: ProjectWorkspace }) {
   return (
@@ -9,11 +11,51 @@ export function ProjectNewChannel({ activeWorkspace }: { activeWorkspace: Projec
       <div className="overview-head">
         <div>
           <Title heading={4}>新建频道</Title>
-          <Text type="secondary">{activeWorkspace.project.name} 暂不支持自定义频道或外部链接接入。</Text>
+          <Text type="secondary">{activeWorkspace.project.name} 的频道入口配置，用于接入外部页面、资料集合或项目流程。</Text>
         </div>
+        <Button type="primary" icon={<IconPlus />}>保存频道</Button>
       </div>
+
+      <Card className="queue-section channel-editor-card" bordered>
+        <Space direction="vertical" size={12} className="action-form">
+          <label>
+            <Text>频道名称</Text>
+            <Input placeholder="例如：客户研究频道" />
+          </label>
+          <label>
+            <Text>频道类型</Text>
+            <Select defaultValue="link">
+              <Select.Option value="link">外部链接</Select.Option>
+              <Select.Option value="source">资料集合</Select.Option>
+              <Select.Option value="workflow">项目流程</Select.Option>
+            </Select>
+          </label>
+          <label>
+            <Text>图标</Text>
+            <Input placeholder="例如：link / user / file" prefix={<IconApps />} />
+          </label>
+          <label>
+            <Text>链接地址</Text>
+            <Input placeholder="https://example.com/channel" prefix={<IconLink />} />
+          </label>
+          <label>
+            <Text>说明</Text>
+            <TextArea rows={4} placeholder="频道用途、维护规则或采集说明" />
+          </label>
+        </Space>
+      </Card>
+
       <Card className="queue-section" bordered>
-        <Empty description="自定义频道暂未开放" />
+        <div className="section-header">
+          <Title heading={6}>创建后可接入的内容</Title>
+          <Tag color="gray">配置预览</Tag>
+        </div>
+        <Space wrap>
+          <Tag color="arcoblue">外部资料库</Tag>
+          <Tag color="green">项目流程页</Tag>
+          <Tag color="orange">RSS/探索结果</Tag>
+          <Tag color="purple">AI 对话上下文</Tag>
+        </Space>
       </Card>
     </div>
   )