Desktop: GTK3 + matplotlib app tracking arbitrary events (button ->
timestamp -> CSV), with per-event stats, trend charts, settings
(rename/add events, relocate data file), and a reset-with-backup flow.
Portable desktop launcher via a .desktop.in template + install script,
no machine-specific paths baked in.
Android: minimal Kivy v1 companion reading/writing the same CSV format,
plus buildozer build tooling isolated in a venv and a local p4a recipe
override for kivy (see CLAUDE.md for why).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
