feat: configurable traffic threshold and Feishu bot alerts

frontend/src/locales/zh-CN.json

@@ -778,6 +778,30 @@
     "verifySuccess": "验证成功",
     "codeError": "验证码错误，请重试"
   },
+  "alertSettings": {
+    "title": "飞书告警",
+    "hint": "速率阈值用于识别突发流量；专线配额仍在专线详情设置。飞书通知默认关闭。",
+    "threshold": "突发速率阈值（Mbps）",
+    "webhook": "飞书 / Lark 群机器人 Webhook",
+    "secret": "签名密钥（可选）",
+    "optional": "机器人开启签名校验时填写",
+    "keepWebhook": "已配置，留空保持原地址",
+    "keepSecret": "已配置，留空保持原密钥",
+    "enabled": "自动推送流量告警",
+    "secretHint": "Webhook 和签名密钥保存后不回显；同一专线的同类通知 5 分钟内不重复发送。",
+    "configure": "设置告警",
+    "logHint": "突发流量按平台阈值记录；配额超额由专线流量策略触发。",
+    "save": "保存设置",
+    "clear": "清除机器人",
+    "clearConfirm": "清除后停止推送并删除机器人凭据，站内告警仍保留。继续？",
+    "cleared": "机器人配置已清除",
+    "saved": "告警设置已保存",
+    "test": "发送测试消息",
+    "testSent": "测试消息已发送，请到群内确认",
+    "loadFailed": "读取告警设置失败",
+    "saveFailed": "保存告警设置失败",
+    "testFailed": "测试消息发送失败"
+  },
   "ipsecPeer": {
     "localParams": "本端 IPSec 参数",
     "loadTemplate": "载入设备模板",