feat(web): restore legacy explore workspace

apps/web_v1/scripts/structure-check.mjs

@@ -121,8 +121,12 @@ for (const forbidden of ['DeepSeek V4.0 Flash', '给 DeepSeek 发送消息', 'Ic
   if (aiPageSource.includes(forbidden)) failures.push(`project AI page contains unsupported chat control ${forbidden}`)
 }
 
+const explorePageSource = readFileSync('src/pages/workspace-explore.tsx', 'utf8')
+for (const required of ['explore-source-card', 'explore-reader-layout', '同步数据源', '添加数据源', 'detectSource']) {
+  if (!explorePageSource.includes(required)) failures.push(`workspace explore page must restore ${required}`)
+}
+
 const unsupportedControls = [
-  { file: 'src/pages/workspace-explore.tsx', required: '暂未开放', forbidden: ['同步数据源', '添加数据源', 'IconRefresh', 'IconEdit', 'IconDelete'] },
   { 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-statusbar.tsx', forbidden: ['升级', '支付', 'billing-plan', '152GB', 'AI 空闲', '服务已连接', 'IconCheckCircle'] },
   { file: 'src/pages/projects/project-topbar.tsx', forbidden: ['停靠左边', '停靠右边', 'DockIcon', 'isDesktopRuntime'] },