Manual automations can be disabled even though they remain runnable

testing #335507

- A manual automation can be marked **Disabled**, but it can still be run manually. Since it has no schedule or
cron job to suspend, the disabled state has no clear meaning.

### Steps to reproduce

1. Create or import a manual automation.
2. Open its overflow menu and choose **Disable**.
3. Observe the automation card and run action.

- **Expected:** Manual automations do not offer a **Disable** action or show a disabled state. Disabling should apply only to automations with a schedule that can be suspended.
- **Actual:** The manual automation is labeled **Disabled**, but its run button remains available and the automation can still be started.