feat: 支持从此处运行、单独运行与单次运行任务

[overflow65537]

新增任务右键菜单与三态复选框，允许从指定任务启动、仅运行单个任务，以及通过右键设置单次运行标记；左键复选框仅在启用与禁用间切换。

Summary by Sourcery

添加三态任务选择（tri-state）与“仅运行一次”语义以及新的运行模式，以改进任务执行控制。

新特性：

• 允许通过任务上下文菜单从特定任务开始执行，或仅运行单个任务。
• 为任务引入“仅运行一次”标记，使任务只参与下一次运行，完成后自动清除。
• 添加任务的三态复选框界面，用于区分启用、禁用和仅运行一次三种状态。

增强：

• 优化任务选择和过滤逻辑，使运行时能够考虑已启用和“仅运行一次”的任务，并通过任务启动服务支持外部启动请求。
• 调整紧凑显示模式和任务名称样式，更准确地反映“仅运行一次”参与状态和未运行任务。
• 为新的任务运行选项和“仅运行一次”提示扩展 i18n 字符串，覆盖所有受支持的语言环境。

Original summary in English

Summary by Sourcery

Add tri-state task selection with run-once semantics and new run modes to improve task execution control.

New Features:

• Allow starting execution from a specific task or running a single task via the task context menu.
• Introduce a run-once flag for tasks that includes them only in the next run and clears automatically after completion.
• Add a tri-state checkbox UI for tasks to distinguish enabled, disabled, and run-once states.

Enhancements:

• Refine task selection and filtering logic so runs consider enabled and run-once tasks and support external start requests via a task start service.
• Adjust compact display and task name styling to reflect run-once participation and non-running tasks more accurately.
• Extend i18n strings for new task run options and run-once hints across supported locales.

[sourcery-ai]

Hey - 我在这里给了一些高层面的反馈：

• 在 toggleTaskEnabled 中，当某个任务 runOnce=true 时，你目前会把它重置为 enabled:false/runOnce:false。这意味着对一个“只运行一次”的任务左键单击时，并不会真正把它切换到启用状态；可以考虑在清除 runOnce 时将 enabled 设置为 true，这样复选框就会像描述中的那样，充当一个简单的启用/禁用切换。
• 条件 isInstanceRunning || isIncompatible 在多个处理函数中被重复使用（复选框点击/上下文菜单、run-from-here/run-single、上下文菜单项）；可以考虑抽取一个小的辅助函数或布尔变量来集中这段逻辑，从而降低未来出现不一致行为的风险。
• TaskList 使用 t.enabled || t.runOnce 来计算 hasEnabledTasks，而 Toolbar 使用 isTaskSelectedForRun；为了避免之后出现行为偏差，你可以在 TaskList 中也复用 isTaskSelectedForRun，这样运行选择的语义就可以集中在一个地方。

给 AI 代理的提示

Please address the comments from this code review:

## Overall Comments
- In toggleTaskEnabled, when a task has runOnce=true you currently reset it to enabled:false/runOnce:false, which means a left-click on a ‘run once’ task does not actually toggle it to enabled; consider setting enabled to true when clearing runOnce so the checkbox behaves as a simple enabled/disabled toggle as described.
- The condition `isInstanceRunning || isIncompatible` is duplicated in several handlers (checkbox click/context menu, run-from-here/run-single, context menu items); consider extracting a small helper or boolean to centralize this logic and reduce the risk of future inconsistencies.
- TaskList uses `t.enabled || t.runOnce` to compute `hasEnabledTasks` while Toolbar uses `isTaskSelectedForRun`; to avoid divergence over time you could reuse `isTaskSelectedForRun` in TaskList as well, keeping the run-selection semantics in one place.

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Original comment in English

Hey - I've left some high level feedback:

• In toggleTaskEnabled, when a task has runOnce=true you currently reset it to enabled:false/runOnce:false, which means a left-click on a ‘run once’ task does not actually toggle it to enabled; consider setting enabled to true when clearing runOnce so the checkbox behaves as a simple enabled/disabled toggle as described.
• The condition isInstanceRunning || isIncompatible is duplicated in several handlers (checkbox click/context menu, run-from-here/run-single, context menu items); consider extracting a small helper or boolean to centralize this logic and reduce the risk of future inconsistencies.
• TaskList uses t.enabled || t.runOnce to compute hasEnabledTasks while Toolbar uses isTaskSelectedForRun; to avoid divergence over time you could reuse isTaskSelectedForRun in TaskList as well, keeping the run-selection semantics in one place.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- In toggleTaskEnabled, when a task has runOnce=true you currently reset it to enabled:false/runOnce:false, which means a left-click on a ‘run once’ task does not actually toggle it to enabled; consider setting enabled to true when clearing runOnce so the checkbox behaves as a simple enabled/disabled toggle as described.
- The condition `isInstanceRunning || isIncompatible` is duplicated in several handlers (checkbox click/context menu, run-from-here/run-single, context menu items); consider extracting a small helper or boolean to centralize this logic and reduce the risk of future inconsistencies.
- TaskList uses `t.enabled || t.runOnce` to compute `hasEnabledTasks` while Toolbar uses `isTaskSelectedForRun`; to avoid divergence over time you could reuse `isTaskSelectedForRun` in TaskList as well, keeping the run-selection semantics in one place.

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