Merge pull request #2958 from AaronZ345/feat/scheduler-run-now

feat(scheduler): add user-confirmed run-now controls

docs/tools/scheduler.mdx

@@ -35,6 +35,17 @@ Create and manage scheduled tasks with natural language:
 - "Remind me about the meeting tomorrow at 3 PM"
 - "Show all scheduled tasks"
 
+## Test-run an existing task
+
+Open the task in the authenticated Web console or Desktop app and click **Run
+now**. After you confirm the delivery, CowAgent queues one immediate execution
+to the task's configured channel and receiver. This user-initiated action is not
+exposed to the agent's scheduler tool.
+
+Manual execution works for disabled tasks and does not enable, delete, or
+reschedule the task. Its original `next_run_at` remains unchanged. A task cannot
+be run manually while the same task is already executing on schedule.
+
 <Frame>
   <img src="https://cdn.link-ai.tech/doc/20260202195402.png" width="800" />
 </Frame>

docs/zh/tools/scheduler.mdx

@@ -35,6 +35,12 @@ description: 创建和管理定时任务
 - "明天下午 3 点提醒我开会"
 - "查看所有定时任务"
 
+## 测试执行已有任务
+
+在经过身份认证的 Web 控制台或 Desktop 应用中打开任务，点击 **立即执行**。确认发送后，CowAgent 会立即按任务已配置的通道和接收者执行一次。这个入口只允许用户手动触发，不会暴露给 Agent 的 scheduler tool。
+
+禁用状态的任务也可手动执行，且不会因此被启用、删除或重新调度，原有 `next_run_at` 保持不变。同一任务正在按计划执行时，不允许重复手动执行。
+
 <Frame>
   <img src="https://cdn.link-ai.tech/doc/20260202195402.png" width="800" />
 </Frame>