Merge pull request #3258 from bwliangc/feat/channel-monitor-jitter

feat(渠道监控): 检测间隔支持正负随机抖动配置

frontend/src/api/admin/channelMonitor.ts

@@ -28,6 +28,8 @@ export interface ChannelMonitor {
   group_name: string
   enabled: boolean
   interval_seconds: number
+  /** 每次调度在 interval 基础上 ± [0, jitter] 的随机偏移（秒），0 = 固定间隔 */
+  jitter_seconds: number
   last_checked_at: string | null
   created_by: number
   created_at: string
@@ -80,6 +82,7 @@ export interface CreateParams {
   group_name?: string
   enabled?: boolean
   interval_seconds: number
+  jitter_seconds?: number
   template_id?: number | null
   extra_headers?: Record<string, string>
   body_override_mode?: BodyOverrideMode