v2.6.0

Install: download tab-out-v2.6.0.zip below.
GitHub also auto-attaches Source code (zip/tar.gz) — those are
repo snapshots without the compiled dist/ output, so they will
not load as an unpacked extension. Ignore them.

Header widgets round 2: the dashboard picks up two new opt-in readouts
that share the widget contract introduced in v2.1.0. A Weather pill
shows current temperature + condition (Open-Meteo, no account
required) next to the clock; a Countdown timer lets you start a
Pomodoro-style run from the header that keeps going across tabs and
reloads, posts a desktop notification on completion, and chimes a
three-note triad when the dashboard is focused. Both widgets are
disabled-by-default / off-by-default respectively so the header stays
quiet until you configure them in Settings.

Added

• Weather widget — temperature + 8-bucket WMO condition icon
  (clear / partly-cloudy / cloud / fog / rain / snow / shower /
  storm) in the dashboard header. Disabled by default. Enable from
  Settings → Weather, enter a city (Open-Meteo geocoding returns
  lat/lon), and pick Celsius or Fahrenheit. The service worker polls
  Open-Meteo every 30 minutes and on demand when the dashboard
  notices cached data older than 30 min. Unit switches are
  display-only — no re-fetch for a C↔F flip.
• Countdown timer widget — single-timer MVP with a 2×3 preset
  grid (5/10/15/25/45/60 min) plus a 1–600 minute custom input.
  State persists in chrome.storage.local['tabout:countdownState']
  so reloading the dashboard mid-countdown resumes the running
  timer, and two dashboard tabs stay in lockstep via
  chrome.storage.onChanged. Completion fans out via
  chrome.notifications (seen from any tab) plus an in-page toast
  and a C5-E5-G5 triad when the dashboard is focused; multi-tab
  users don't get stacked effects. Reset/pause/resume wire into
  chrome.alarms.{create,clear} so the SW can fire the completion
  alarm even if every Tab Out tab is suspended.
• playCompletionSound() in animations.ts — three-note triad
  reusing the shared AudioContext pool already behind
  playCloseSound().
• Weather + Countdown sections on the Options page, complete with
  dirty-state tracking + Save.

Changed

• tabout:settings picks up two new top-level keys: weather
  (enabled, locationLabel, latitude, longitude, unit) and
  countdown (enabled, soundEnabled). setSettings(patch)
  extends the spread-merge pattern so a partial patch like
  { weather: { unit: 'F' } } doesn't clobber siblings;
  normalizeSettings() clamps lat/lon to ±90 / ±180 and rejects
  non-finite values.
• manifest.json picks up the "notifications" permission and two
  Open-Meteo host_permissions (api.open-meteo.com,
  geocoding-api.open-meteo.com). Chrome will prompt for
  notifications on extension reload (standard MV3 flow).
• background.js gains fetchWeatherNow() (Open-Meteo poller with
  SW-side 30-min alarm + on-demand chrome.runtime.sendMessage
  trigger on location/enabled edges) and handleCountdownComplete()
  (alarm-driven notification + 24h stale guard so a browser restart
  doesn't fire "your timer is done" for a timer that ended yesterday).