v1.2.0

Flux Hourglass 1.2.0

Two ergonomic improvements that make the timer feel less like a one-shot
demo and more like a tool you reach for repeatedly.

Highlights

• Completion chime. When the timer finishes, a soft three-note chime
  plays on the notification audio stream alongside the existing vibration
  pulse. Volume is intentionally subdued so it does not intrude on
  meditation or focus sessions; if the device is silent, only the
  vibration fires.
• Remembers your last duration. A small DataStore Preferences file
  persists the most recent H R / M I N / S E C the user pressed
  S T A R T with. The next time the app launches, the pickers are
  pre-seeded with that value — no extra preset tap needed.

Implementation notes

• TimerPreferences is a thin wrapper over a Preferences DataStore
  named timer_prefs. Reads are clamped to the same ranges as the picker
  (0..99 hours, 0..59 minutes/seconds) so corrupt or out-of-range
  storage cannot crash the UI.
• The chime uses ToneGenerator(STREAM_NOTIFICATION, 70) so it respects
  the user's silent/DnD profile and does not require any new permission.
• Seed reads happen with runBlocking { observe(context).first() }
  during composition. The first launch hits the disk once; everything
  after that is in the Compose state.