031 — Notification settings in tray

[archae0pteryx]

031 — Notification settings in tray

Parent PRD

PRD.md §FR7 (configuration)

What to build

Expose per-source notification toggles in the tray menu, using the NotificationSource interface from 029. Designed to slot into the future settings window (026) without rework.

Tray structure

Settings
  ├── Displays          (existing)
  ├── Window
  │     └── Always on Top  (existing)
  └── Notifications
        └── Timer expired  ✓/✗  (toggleable, sourced from TimerExpiredSource::label())

• Toggle reads/writes NotificationSettings::sources["timer_expired"]
• Persists immediately to settings.yaml
• Adding a new NotificationSource implementation automatically appears here — no hardcoded list

Implementation note

The tray submenu builder should iterate registered NotificationSource implementations (or a static list for now) rather than hardcoding menu items. This makes the submenu extensible when new sources are added.

Completion promise

User can enable/disable timer expiry notifications from the tray without editing settings.yaml. The mechanism is generic enough that new notification sources appear automatically.

Acceptance criteria

• Tray → Settings → Notifications submenu exists
• "Timer expired" toggle reflects current notifications.sources["timer_expired"] value
• Toggling updates settings.yaml and takes effect immediately (no restart needed)
• Existing Settings submenus (Displays, Window) unaffected
• Adding a second NotificationSource requires no changes to tray menu builder
• task check green

Blocked by

029 (NotificationSource trait + NotificationSettings in domain)