feat(modules): 帮助中心、工单、工作流与多渠道接入

补齐 FAQ、帮助中心、工单、可视化工作流及 Telegram/WhatsApp/Slack 等渠道模块。

frontend/src/utils/channelAccounts.ts

@@ -0,0 +1,31 @@
+/*
+Copyright 2024-2026 ChatterMate
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import type { ChannelAccount } from '@/services/channels'
+
+/** The integration-card warning for accounts whose platform stopped accepting
+ *  their credentials, or undefined when every account is healthy. */
+export const reconnectWarning = (accounts: ChannelAccount[]): string | undefined => {
+  const expired = accounts.filter(a => a.needs_reconnect)
+  if (!expired.length) return undefined
+  const names = expired.map(a => a.display_name || a.external_account_id).join(', ')
+  return `以下账号的访问权限已过期：${names}，请重新连接以恢复回复。`
+}
+
+/** The account a card's Manage opens: one that needs reconnecting first, so
+ *  the card's warning leads to its fix, else the first connected. */
+export const accountToManage = (accounts: ChannelAccount[]): ChannelAccount | null =>
+  accounts.find(a => a.needs_reconnect) ?? accounts[0] ?? null