Full-featured workout tracker with session persistence, auto A/B cycling,
warmup weights (4/5 of target), settings weight stepper, history + progress
graph, HTTP sync server, and crash-safe active session resume.
Removed per-set break timers per user preference. Dropped audioplayers and
vibration dependencies; updated permission_handler to 12.x to eliminate
two of three KGP build warnings (shared_preferences_android is an upstream issue).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
