Add Progress over time and a targets and reminders setup

Progress gives a Day/Week/Month view of routines held against a weekly
target, compared with the same point of the previous period, with active
time and the daily streak. Targets & reminders sets routines and minutes
per week and schedules a heads-up before each routine. The runner's summary
now shows today's held count and streak. Finished runs are mirrored to a
device run log that feeds both.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KhQh614DMeYoQEH9SoMRUw

frontend/pubspec.yaml

@@ -46,6 +46,7 @@ dependencies:
 
   # ── Notifications ───────────────────────────────────────────────────────
   flutter_local_notifications: ^21.0.0
+  timezone: ^0.11.1
   local_notifier: ^0.1.6
 
   # ── UI ──────────────────────────────────────────────────────────────────