Add scheduled task automation skill with worker execution pipeline.

Introduce scheduled-task-automation for H5 and WeChat, persist tasks in h5_scheduled_tasks, and run due jobs via a dedicated worker that executes agent tasks and delivers results.

Co-authored-by: Cursor <cursoragent@cursor.com>

chat-skills.mjs

@@ -1,7 +1,10 @@
 // Keep browser-safe: do not import user-publish.mjs (uses node:fs/path/url).
+import { shouldUseScheduledTaskAutomation } from './scheduled-task-intent.mjs';
+
 const PUBLISH_SKILL_NAME = 'static-page-publish';
 export const PAGE_DATA_COLLECT_SKILL_NAME = 'page-data-collect';
 export const EXCEL_ANALYST_SKILL_NAME = 'excel-analyst';
+export const SCHEDULED_TASK_AUTOMATION_SKILL_NAME = 'scheduled-task-automation';
 export const AIDER_DEVELOPMENT_SKILL_NAME = 'aider-development';
 export const SKILL_ROUTER_V2_ENV = 'TKMIND_SKILL_ROUTER_V2';
 
@@ -297,6 +300,12 @@ export function buildChatSkillPrompt(promptKey, skillName) {
         '只有用户明确要求 Word / docx 下载时，才先 `load_skill` → `docx-generate`，生成 `public/*.docx` 并确认文件已存在，再写 HTML 并用同目录相对路径链接该文档。' +
         '只有用户明确要求长图下载时，才先 `load_skill` → `long-image-download`，调用 `generate_long_image` 生成 `public/*.long.png` 并确认文件已存在，再给长图预览链接和 `?download=long-image` 下载链接。不要在没有明确需求时强制生成伴生文件。'
       );
+    case 'scheduled-task-automation':
+      return (
+        `请使用 ${skillName ?? SCHEDULED_TASK_AUTOMATION_SKILL_NAME} 技能：这是定时自动任务（Scheduled Automation），不是待办提醒。` +
+        '先澄清缺失的执行时间或 taskSpec，再调用 scheduled_task_create / scheduled_task_list / scheduled_task_cancel。' +
+        '禁止在当前对话立即执行长任务；工具成功返回后才能确认已设置。一次性任务用 runAtLocal，循环任务用 hour/minute/weekday。我的需求是：'
+      );
     default:
       return '';
   }
@@ -407,6 +416,12 @@ function buildManifestSkillPrompt(route) {
 }
 
 function buildLegacyAutoChatSkillPrefix(trimmed, grantedSkills) {
+  if (
+    grantedSkills.includes(SCHEDULED_TASK_AUTOMATION_SKILL_NAME) &&
+    shouldUseScheduledTaskAutomation(trimmed)
+  ) {
+    return buildChatSkillPrompt('scheduled-task-automation', SCHEDULED_TASK_AUTOMATION_SKILL_NAME);
+  }
   if (
     grantedSkills.includes(EXCEL_ANALYST_SKILL_NAME) &&
     isExcelAnalysisIntent(trimmed)