| T3-01 | Admin/HR opens notification settings | Settings load successfully | |
| T3-02 | Non-Admin/HR opens settings APIs | Returns 403 | |
| T3-03 | Disable global email toggle | No event sends email even if event email is enabled | |
| T3-04 | Disable internal channel for one event | That event creates no internal notification | |
| T3-05 | Disable email channel for one event | That event sends no email, internal still works if enabled | |
| T3-06 | Re-enable channels and trigger event | Delivery resumes as configured | |
| T3-07 | Save invalid payload/event key | Returns 422 validation error | |