kunkka19xx/look

v0.4.4 — Pomodoro lag hotfix

Fixes a CPU/main-thread leak in the menu-bar Pomodoro timer that caused progressive UI lag during long sessions.

What was wrong

The menu-bar status item was accumulating SwiftUI observation trackers over time. Two compounding sources:

• A 1 Hz heartbeat Timer installed a fresh tracker every second on top of the existing one.
• Each fired tracker scheduled another refresh(), which installed yet another tracker — so per tick the work multiplied instead of staying flat.
• On every refresh, button.image was reassigned to a brand-new NSImage(systemSymbolName:), forcing CoreUI to re-rasterize the SF Symbol from the catalog each time.

Result:

After hours of running, the main thread spent the majority of its time inside PomoMenuBarItem.refresh() → CUICatalog glyph resolution. Pressing Space to start the timer made it suddenly visible
because that's when ticks resume and the backlog re-fires.

What changed

• Removed the 1 Hz Timer heartbeat — Observable already drives refreshes on demand.
• Cached the SF Symbol NSImage once at install; no more per-tick re-rasterization.
• Added a single-flight guard so overlapping onChange firings coalesce into one refresh().

Effect

Exactly one observation tracker live at any time, one refresh per state change, no symbol re-resolution. CPU cost of the menu-bar timer is now flat regardless of session length.

Full Changelog: https://github.com/kunkka19xx/look/compare/v0.4.3.2...v0.4.4