feat(schedule): support KOL subscription targets and random time windows

Extend schedule tasks to dispatch KOL subscription prompts in addition
to prompt rules, add daily/weekly scheduling with fixed or random time
windows, and track dispatch outcomes (last run, status, consecutive
failures).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/shared-types/src/index.ts

@@ -1675,15 +1675,31 @@ export interface PromptRuleStatusRequest {
 
 // --- Schedule Tasks ---
 
+export type ScheduleTargetType = 'prompt_rule' | 'kol_subscription_prompt'
+export type ScheduleKind = 'daily' | 'weekly'
+export type ScheduleTimeMode = 'fixed' | 'random_window'
+export type ScheduleDispatchStatus = 'success' | 'failed' | string
+
 export interface ScheduleTask {
   id: number
   workspace_id: number | null
-  prompt_rule_id: number
+  target_type: ScheduleTargetType
+  prompt_rule_id: number | null
   prompt_rule_name: string | null
+  subscription_prompt_id: number | null
+  subscription_prompt_name: string | null
+  subscription_package_name: string | null
+  subscription_kol_name: string | null
   brand_id: number | null
   brand_name: string | null
   name: string
   cron_expr: string
+  schedule_kind: ScheduleKind
+  schedule_days: string[]
+  schedule_time_mode: ScheduleTimeMode
+  random_window_start: string
+  random_window_end: string
+  generation_input: Record<string, JsonValue>
   auto_publish: boolean
   publish_account_ids: string[]
   auto_publish_platforms: string[]
@@ -1695,6 +1711,10 @@ export interface ScheduleTask {
   end_at: string | null
   next_run_at: string | null
   status: 'enabled' | 'disabled'
+  last_run_at: string | null
+  last_dispatch_status: ScheduleDispatchStatus | null
+  last_dispatch_error: string | null
+  consecutive_failures: number
   generation_status?: string | null
   execution_time?: string | null
   generated_articles?: GeneratedArticleLink[] | null
@@ -1703,10 +1723,18 @@ export interface ScheduleTask {
 }
 
 export interface ScheduleTaskRequest {
-  prompt_rule_id: number
+  target_type?: ScheduleTargetType
+  prompt_rule_id?: number | null
+  subscription_prompt_id?: number | null
   brand_id?: number | null
   name: string
-  cron_expr: string
+  cron_expr?: string
+  schedule_kind?: ScheduleKind
+  schedule_days?: string[]
+  schedule_time_mode?: ScheduleTimeMode
+  random_window_start?: string
+  random_window_end?: string
+  generation_input?: Record<string, JsonValue>
   auto_publish?: boolean
   publish_account_ids?: string[]
   cover_asset_url?: string | null
@@ -1721,6 +1749,8 @@ export interface ScheduleTaskListParams {
   page?: number
   page_size?: number
   prompt_rule_id?: number
+  subscription_prompt_id?: number
+  target_type?: ScheduleTargetType
   status?: string
   keyword?: string
   created_from?: string