Guide Feishu app setup and surface tenant lookup codes

frontend/src/locales/en-US.json

@@ -575,6 +575,7 @@
   },
   "identity": {
     "tab": "Feishu identity", "title": "Built-in Feishu identity service", "description": "Issue OIDC identities for VPN using your existing HTTPS domain. Feishu app credentials stay upstream; this platform creates separate VPN client credentials.",
+    "guideTitle": "Configure your Feishu app", "guideApp": "In Feishu Open Platform → Enterprise apps, open your app. Copy the App ID and App Secret from Credentials & Basic Information into the fields below. Use enterprise app credentials.", "guidePermission": "In Permissions, request read access to enterprise information (search for tenant:tenant:readonly or 'get enterprise information'; use the actual name shown by Feishu) for automatic tenant lookup. Allow the user_profile scope for browser sign-in user info.", "guidePublish": "Publish or enable the new app version, complete administrator review if required, and add VPN users to the app's availability scope. Creating the app or adding a permission alone does not activate it.", "guideCallback": "In Security Settings → Redirect URLs, add this exact Feishu sign-in callback:", "guideCallbackPending": "Configure the HTTPS domain under Public Gateway first to see the callback URL.", "guideVerify": "Save and enable the identity service here, then sync its public routes and try a user in the app's availability scope. The Feishu callback differs from the VPN client callback below.", "guideManual": "If automatic lookup fails, enter a tenant_key verified from user information in the same enterprise. The Feishu error code appears below the field; retry after changing credentials or permissions.",
     "appId": "Feishu App ID", "appSecret": "Feishu App Secret", "secretPlaceholder": "Leave blank to retain the secret; use a rotated secret for new setup", "tenant": "Allowed Feishu tenant_key", "tenantPlaceholder": "Fetch automatically or enter manually", "fetchTenant": "Fetch tenant ID", "tenantFetched": "Feishu tenant ID retrieved", "tenantFailed": "Could not fetch Feishu tenant", "enabled": "Enable built-in issuer", "httpsOnly": "Enter app credentials only through the HTTPS management site. Switch to its secure address.", "openHttps": "Open HTTPS management site",
     "httpsRequired": "Configure and activate your public HTTPS site and certificate first.", "gatewayPending": "The identity provider is saved but Nginx does not yet route /id/; sync the gateway.",
     "addresses": "Addresses and client credentials", "issuer": "OIDC issuer", "feishuCallback": "Callback registered in Feishu", "vpnCallback": "VPN client callback", "clientId": "VPN Client ID",

frontend/src/locales/zh-CN.json

@@ -575,6 +575,7 @@
   },
   "identity": {
     "tab": "飞书身份", "title": "内置飞书身份服务", "description": "使用现有 HTTPS 域名签发 VPN 所需 OIDC 身份令牌。飞书 App 凭据仅用于飞书上游，VPN 客户端凭据由本平台生成。",
+    "guideTitle": "飞书开放平台配置步骤", "guideApp": "在飞书开放平台 → 企业自建应用中打开你的应用；在「凭证与基础信息」复制 App ID 和 App Secret，填入下方。不要使用商店应用或智能体的其他凭据。", "guidePermission": "在「权限管理」申请企业信息读取权限（搜索 tenant:tenant:readonly 或“获取企业信息”，以飞书控制台实际名称为准），供“自动获取企业标识”使用；网页授权还需允许 user_profile 范围以读取登录用户信息。", "guidePublish": "按企业要求发布/启用新版本，等待管理员审核，并在「应用可用范围」加入需要登录 VPN 的用户；只创建应用或添加权限不代表已生效。", "guideCallback": "在飞书应用的「安全设置 → 重定向 URL」添加飞书登录回调（完整地址）：", "guideCallbackPending": "先在「公网入口」完成 HTTPS 域名配置，页面才会显示回调地址。", "guideVerify": "保存并启用本页身份服务，再同步身份公网路由；用应用可用范围内的账号试登录。飞书回调地址与下方 VPN 客户端回调地址不同。", "guideManual": "自动获取失败时可手填 tenant_key；请从同一企业的飞书用户信息核对。错误码会显示在输入框下方，凭据或权限变更后可重试。",
     "appId": "飞书 App ID", "appSecret": "飞书 App Secret", "secretPlaceholder": "留空保持当前密钥；新配置请输入轮换后的密钥", "tenant": "允许的飞书 tenant_key", "tenantPlaceholder": "可自动获取，也可手动填写", "fetchTenant": "自动获取企业标识", "tenantFetched": "已读取飞书企业标识", "tenantFailed": "读取飞书企业信息失败", "enabled": "启用内置发行者", "httpsOnly": "应用密钥只能通过 HTTPS 管理入口填写；请切换到安全地址。", "openHttps": "打开 HTTPS 管理入口",
     "httpsRequired": "请先完成公网域名 HTTPS 证书和站点配置，再启用身份服务。", "gatewayPending": "身份服务已保存，但 Nginx 尚未转发 /id/；请同步公网入口。",
     "addresses": "接入地址与客户端凭据", "issuer": "OIDC 发行者", "feishuCallback": "登记到飞书应用的回调", "vpnCallback": "VPN 客户端回调", "clientId": "VPN Client ID",